Ecu sensor ground. This is likely what is feeding back into the ECU.

Ecu sensor ground 2-0. Ok , now I've got ground pins off my ECU and two 0v ref pins. Ignition 12V Hey guys. Connection To ECU. TPS-->ECU-->Engine block/chasis. Ecu-->Engine block/chasis. Car engine computer unit is connected with the electrical system of your vehicles. They are designed to be a "clean" ground, so that your sensor does not receive noise via its ground wiring. Remember Me? Join us now! Site Navigation. 3V peak to peak max 27 Power Ground 28 Ecu Ground 29 Sensor Ground 30 Analog In #4 31 Analog In #1 32 IAT In 33 WBO VGND 34 +5V supply 35 Analog In #5 36 Switch #3 In 37 Analog In #6 38 Sensor Ground 39 Sensor Ground Black 39pin connector Grey 24pin connector. 9 hours ago, One Armed Bandit said: - Each sensor seems to have its own signal ground to the stock ECU but Am i right in assuming with the Link I can just connect them together to a single gnd out. Frank @ Elegant Drift Shop Francis Grenier-Desbiens. MX-5 Miata Forum > NA/NB (1990-2005) Miata > NA/NB Power Mods > ECUs, ECU Tuning and Programming > NB2 ECU sensor ground. I believe the advice about grounding the shields to the sensor ground stems from some OEM wiring where the shield is used as the reference ground conductor, for example a 2 wire knock sensor may be run with a single core shielded wire, and the shield is used as the A best practice when wiring up sensors, is to connect the sensor grounds directly back to the ECU, rather than using your star ground point. Not boost cut, fuel cut or ignition cut etc no where near those limits. To piggy back can I ignore the Fury's +5/Gnd wires and just connect the sensor wire or should I be using An Volt inputs as per the eng. As for the sensor ground it does not matter which you use. Preventing Ground Offset Issues: When sensors are grounded to Sensors like the MAF, O2, and CKP have multiple wires that serve functions such as power supply, grounding, and signal transmission to the ECU. 4: Injector Output 1: Controls the first fuel injector, managing the fuel delivery to the engine. In modern vehicles, sensors play a critical role in monitoring and controlling I just bought a pre-made A Loom which had all the "sensor ground" pins terminated to a "shield ground" pin. Ignition 2 Ignition 3 Ignition 4 The ECU should be fitted inside the vehicle cabin in a location that avoids exposure to excessive temperatures and the risk of water ingress. Yellow - TDC Sensor Signal 12. Step 9. Blue - TDC Sensor Power 6. , 0-5 V, depending on the sensor) or 0-1 V. Posted November 5, 2019. Corrosion. Our ECU doesnt use the TDC P/M. This can be engine, chassis, negative battery terminal. today i put the ecu back in the car and started a data log and my coolant temps are reading -74 may map sensors reading 38 psi and my tps volts are 4. Using a couple of these ZF sensors below for crank and cam position. 928sg. I connected one end to IAT input and the other to “Sensor Ground”. There is always going to be some electical noise in the engine bay ECM sensors should be tested for ground integrity by connecting the sensor ground pin to the engine block. *Connect wiring to one side of the thermistor device, connect the other side of a thermistor device to a sensor ground input pin to the ECU (same input pins as a 0-5v sensor) • “S” – Inductive Speed Input – Designed for an For sensor ground (Pin B on coils) to ECU I've used 20AWG coming from each coil joined into a single 18AWG that will go to ECU sensor ground pin. The picture below shows the location and proper repair of a blown sensor ground trace on a 2G DSM ECU. The location of the ECU Note that the ECU is shown, so the number represent the ‘back’ of the wiring harness connectors, or ‘wire-side’. Yes, the 4 "Gnd 3 wire pressure sensors you can usually share the signal - so for instance the one oil pressure sensor could be connected to both the gauge and the ecu. The polarity will need to be checked. 15+ Looking at the EMU classic manual (Not exactly the same as the black but more simplified with less pins) for VR sensors the pins are B7 (primary trigger) and B18 (sensor ground) so your correct with the sensor ground but if doesn't show a thing about power going to it, and neither does the pinout for the 7mgte stock ECU the pins that go to the CPS are "G-, G1, G1, EC on the engine valve cover (main ECU/sensor ground) Those are the actual harness grounds. benjames; 1 Quote; benjames. g. 1 - I have CRANK, CAM, KNOCK with shieldcan I join the three shield and connect these to pin A7 (Shield/Gnd) of Thunder ? 2- One sensor ground cable and one shield cable : can I join both and connect these to pin A7 (Shield/Gnd) The E2 circuit serves as a signal return or sensor ground. Sensor Grounds: Use the sensor ground pins on the ECU, not the engine block. Should I ignore the +5, and connect the gauge signal ground to ECU signal ground? Reading the instructions with the AEM X-Series GPS Speedo it looks like there are two wires on connector B - A yellow and a violet wire. Sensor Ground. I read to only keep 5v sensors on the sensor grounds. I see you used four shielded lines and this can become a real challenge getting the four shield bundles all back to a single pin on the ecu an I would be keen on Hi, I recently got a Bosch AIT for my emu black. I believe grounding the O2 sensor body was instrumental in reducing CO caused by rich running. I believe the sensors should all go to this 0v reference pin. Fuel level sensor a bit off, who cares, crank position a bit off = badness. Disconnect the harness from the ECU. benjames. The connection between the ECU and the vehicle’s chassis can become corroded due to exposure to moisture, salt, and other The analog ground and the heater ground are likely internally connected, if you connect the analog ground to ecu sensor ground and the heater ground to some other point then you will potentially cause a variable voltage offset on the ecu sensor ground that changes depending on electrical load. These allow current from the injectors, coils, DBW system and low-side switches to flow back to ground (battery negative). Depending on If the ECU is using the same reference point for ground as the sensor, then any ground offset is minimized. If your wideband controller only has a single ground wire then you dont want to connect it to ecu sensor ground - the best option The reason is the transistor on these coils is quite sensitive so you only need about a 1V offset between the signal ground wire and the trigger wire to cause the coils to start charging. Ross Honnor Ross Honnor . The best way to prevent unwanted signal noise is to ground the sensors at the MegaSquirt ECU, and ground the MegaSquirt ECU directly at the engine block. Connecting this to an aftermarket ECU sensor ground can create a ground loop causing signal noise. Sensor Voltage Limits. All your analog sensors need to be grounded to the ECU's sensor ground. Clean or replace sensors like the oxygen sensor, mass airflow sensor, or throttle position sensor if needed. Does that sound right? No, the green Ground out/sensor ground wires on both looms are only to be connected to sensors etc. But yes, I didnt look to see that they both grounded together at the block. The coil signal ground connected to ecu sensor ground is the most correct so that is fine if your wiring is already done that way. Two wire temperature sensors are a ground and a signal wire with a pullup on the signal wire at the ecu/gauge end. Check Ground Connections: Ensure that all ground connections are clean and secure. Is this correct? Do I snip or splice into this pin#4? Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU) Knock inputs 1. Throttle pin 6 to any ECU AN Volt input Throttle module White/Brown to ECU aux output 1 or 3. If significant conductance (10 ohms or below) can be measured from a sensor ground pin to the vehicle’s chassis ground when the ECU is disconnected from the harness then that indicates a wiring Im not convinced the trigger is happy though. and the other goes to one of the ECU's sensor ground pins. Check for voltage drops across the ECU’s power and ground connections using a multimeter. Inadequate grounding for 5V referenced sensors can result in noisy signals, leading to erroneous sensor readings and compromised engine performance. This sensor ground circuit affects the CTS, TPS, IAT, MAP, ECU and diagnostic connector grounds. pin 15-19 These are the grounds for the ECU, coming off multiple pins to minimise resistance. For proper connection, the Ground terminal (3) should be linked to the ECU sensor ground. This should be correct then ? Usually signal ground comes from the Engine ECU, diagnostic gateway or nearest ecu/module, signal ground always ends up to ground through either a cleverly designed ground plain in the ECU/Module or through a number of One thing worth noting is that even when the sensor ground wires were unhooked from the sensor ground pin of the ECU, they still report values - aka, they are getting a ground source from someplace else. Chassis Grounding: If relocating the battery, ensure a clean chassis ground connection near the engine bay and another from the chassis These sen-sor grounds return to the computer itself, rather than to the engine block or the vehicle’s body or chassis. There are no questions yet, be the first to ask something for this product. From my knowledge I should ground the shield to the chasis close to the ECU, then one wire to signal on ECU and the 2nd wire should go to a sensor ground from the ECU as well. I tried hooking a jumper cable from battery negative to one part of the engine that showed 170 mV, and that solved the grounding kind of (it was at 0), but in turn the battery potential dropped because of NB2 ECU sensor ground ECUs, ECU Tuning and Programming. Sensors, if they have the ground isolated from the sensor body (for example TPS, pressure, temperature sensors), they must be grounded to the sensor ground on the ECU, not the engine ground. PDA. Red - +12V Ign Input 11. – Identify sensors: Find the sensors that are connected to the ECU, such as the oxygen (O2), TPS (throttle position sensor), and MAF (bulk air flow). They should be earthed directly to the chassis. I did a lot of research. chris davey. Posted October 31, 2020. Quote; 928sg. Wire to pin 72 for 1G, 92 for 2G. Do not ground these directly, or wire them as a additional grounds to anything that has a direct engine/battery grounding. 5: Sensor Ground: Provides a ground reference for various sensors connected to the Common fault codes related to a bad ECU include issues with the oxygen sensor, fuel injection system, or ignition system. Does it go to sensor ground or splice to a typical chassis ground? Can't recall how mine is hooked up, going to check on it today. Green - Water Temp Sensor 8. Wiring wideband afr to an volt 7 through rear o2 sensor harness 2005 forester xt into the g4x confusion with the ground point for the brown 0-5v analog output negative my tuner sent this my question is where to ground to "ecu ground" could this be expansion 1 ground signal or something like taping into D3 D7 B12 or any of the ground similar or do i just ground to the Power Grounds. Referring to an EWD, you will notice that the throttle position sensor, water and air temperature sensors, and air flow meter all flow current to ground through thanks for the reply, from what I can tell is this the correct way to ground it? 1: ecu sensor ground pin, wire, solder heat shrink, shield wire. Pin 3 should be connected to ECU sensor ground, it wont spark without it and it has a relatively low switching threshold hence its not recommended not connect to engine or chassis ground as any ground offset could cause random sparks. You will potentially lose a little accuracy as the sensor is not referencing the ECU 5V or sensor ground but for oil pressure high accuracy is not usually critical. See how it's dome using a 20 OHM resistor and how to stress the The factory ECU might have separate ground planes, one for switched power outputs and another decoupled sensor ground or whatever makes sense, but the UA4C uses a common ground for all circuits. From the help files, the cam & crank sensor ground is spliced together with the cable shielding to Shield/Gnd. Bad ground connections can cause electrical Red : Sensor ground (to ECU sensor ground pin) Black : Ground/shield to gearbox (same place as the ECU Ground and knock sensor shield's, being nut on the gearbox) Same with the knock sensors; 1 signal(ECU), 1 sensor ground(ECU) and 1 grounded to the gearbox. The other signal ground , should this go to 0v pin or the ground pin on my ECU ? Ecu/sensor ground is a ground provided by the ecu (circuit goes through ECU to ground ) e. For O2 wires identification: Sensor wiring and shielding, what's the go?This question, which has been taken from a free live motorsport wiring webinar, asks for advice on crank and cam a ECU grounding might be confusing to you, but knowing some engine grounding tips can make it simple and easy. s The Ecumaster 400 kPa MAP sensor features three terminals: +5V (1), MAP out (2), and Ground (3). Perform a Voltage Drop Test. 4 K ohm. Top. This is likely what is feeding back into the ECU. I checked the resistance of the wheel speed sensors and they are within spec 1. 3-1. For sensors it is best to use sensor ground as there will be an offset between chassis ground and ecu ground depending on how much current is passing through the chassis connections and the ecu wiring. ECU Sensor ground are pins B11 & B15. But in the case of my coils (LS style) I've got one pin out of the coil going to cyl head. These pins must not be connected to any other grounds in the vehicle. It acts like the grounds on TPS, CLT, and MAP, all of which should connected to the ECU sensor ground pin. Check battery 4. Ensure that the MAP sensor is securely The factory ECU used a water temp sensor, and the factory dash used a separate temp sensor for the the water temp gauge. Some important ECU grounding tips: Every grounding wire has to be resistant. I'd Blue - TPS Sensor 3. I know on the Megasquirt the logic ground is tied into some shields but a lot of other ECUs use sensor ground/sensor return for of course dedicated clean ground for sensors and also use the sensor ground for a grounding point for shields. **Please note DO NOT USE Inaccurate sensor readings due to signal noise are not only a nuisance, but a hazard. DI is in place, so is 14v power. I was told to connect the white wire to Pin #4 (Currently on Pin #15). not connected to the harness or its junction blocks). It has to know where #1 TDC is and it has to know when the valves are on Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU) Knock input 1 50 k input impedance; Sampled at 80 kHz (12-bit resolution, 3. The ECU sensor ground must not be connected to ground in the harness / outside the ECU Throttle pin 3 to ECU sensor ground. 2x0 Posts: 91 Joined: Sun Feb 05, 2017 1:51 am Page 58 Diagnostics Suspect Fault Blink Component Description Cause Repair Information Code Function and Location (FMI) Wheel Shorted to Continuity between - Check sensor, sensor cable Speed Ground the sensor and connectors to verify no Sensor F connection and loose or damaged connection. It is useful to point out that newer cars use grounding straps or 4 wire O2 sensors to eliminate the electrical resistance problem in aging exhaust systems. , above. People will ground the sensor to "fix" voltage readings, but since it's not getting back via logic ground, they continue to read incorrectly. *2 – There was a change to the tacho circuit in 1994 cars. Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU) Knock inputs: 1: 50 k input impedance; Sampled at 80 kHz (12-bit resolution, 3. HI gents, I need to confirm my understanding of the sensor ground/gournd out and shield grounds for a Link Fury G4X. 3: ecu sensor ground pin, shield wire. Is the table below correct? I’m running an EMU black on an older Porsche 911 with turbo. Consult your factory wiring diagram (or check with a multimeter on the stock Following the wiring guide that comes with the sensor, we wire up +12V, signal and sensor ground to the ECU wiring harness. BLACK *be sure to install flyback diodes if needed on LS lines. The 5V regulator is capable of 400mA at its rated accuracy and most common sensors require about 5mA, so I wouldnt normally even start to consider sensor ground current until you have more than say 30 sensors connected. Green - Trigger Sensor Signal ECU Universal Thanks, I see it now. 50 k input impedance; Sampled at 80 kHz (12-bit resolution, 3. Send this to your Factory VSS pin on your ECU wiring or to a Digital Pulsed input if using an aftermarket ECU. I have personally always wired the earths to the head even engines around 2000+hp with no issue . 33 Sensors Ground (Knock, Coolant, Throttle, Exhaust Gas Temp, Intake Air Temp, RPM, Manifold Pressure, Acceleration Sensors) Brown - NO signal 55 Ground Brown/Black - good signal 56 Ground Brown/White - good signal 58 Ground (OBD1 Automatic Only), Oxygen Sensor 2 Sensor Ground (OBD2) White - good signal 67 Engine RPM Sensor 2 - INPUT SIGNAL FROM ECU 3- EMPTY 4 - GROUND TO ENGINE BLOCK WITH BATTERY GROUNDED IN THE SAME SPOT 5 - EMPTY 6 - OUTPUT TO IGNITION COIL PIN 1 Verify spark, then timing if you have spark, then the cam sensor to ECU RAM correlation for fueling. Join Date Oct 2005 Location QLD Sensor ground A pin on the ECU meant for grounding sensors to. and the gauge ground wire I would connect to chassis ground rather than the ECU sensor ground. Install 1 sensor to ecu knock sensor 1, and the other to knock sensor 2. The 2G ECUs almost always blow the The sensor ground is only for ANALOGUE VOLT/TEMP SENSORS. It’s very important and not something to overlook in diagnosing your Renix Jeep as it is common for the harnesses to Also I was considering switching to the taarks came sync kit that just provides a home signal and getting rid of the stock CAS all together. My problem is that even if I connect the wires the other way around, I still get a The Ecumaster 400 kPa MAP sensor features three terminals: +5V (1), MAP out (2), and Ground (3). I connected the wheel speed sensor to a digital input and the other to the ECU sensor ground. 88 and 98% or so And an email from AEM saying do as per manual, sensor ground back to ECU, and power ground back to battery. The sensor ground should never be linked with the other grounds. Members; 28 ECU model: G4+ Serial Number: 307; Author ECU model: Link fury; Serial Number: 0000; Report; flex fuel sensor, two speed hall sensors (front wheel and rear axle) Should all these go to sensor ground even though some are 5v 12v or internal pullup powered? Many thanks Quote; Adamw. We will talk more about ground loops another time, those deserve their own entire post. My last challenge is trying to get a vehicle speed from the wheel speed sensors. Attacking Issue #3B: Signal Ground Issues. I should take a screenshot of the engine bay ground locations. Typically you'd want that sensor grounded directly to your ECU, not the engine, so you'd end up with three pins at the ECU: sensor ground, sensor signal, and shield ground (connected to an ECU ground). Assuming you have a VR wheel speed sensor, then its two wires connect to the "VR and Gnd" pads on the back end of the PCB. I read and I need to keep my 12v sensors (Flex Fuel,sr20 CAM sensor) off of the sensor ground on the ecu and to ground those sensors to the engine ground. Blue - Map Sensor 4. Significant drops can indicate wiring problems Ideally you want the wideband controller sensor ground to be the same as the ecu sensor ground or you will get different AFR readings between the two. View Full Version : NB2 ECU sensor ground. Do not use the negative terminal of the battery. UEGO controller sensor output harness analog voltage output and sensor ground should go to the ECU or logging Verified all Black/Brown ground connectors connected to the ECU, OK (these are the sensor grounds that are faulty) Measured directly on the ECU pins from where B/W and B/Br are connected. I was also told to keep my speed sen Gnd Out TPS and MAP sensor ground For sensor grounds. Quote; so ive followed the instructions on the AEM unit and its says that the brown oxy ground goes to the ecu sensor ground which i have done and the black guage ground is just wired onto a ground im using for my other guages behind the dash, can anyone confirm that this is the right way or should i be connecting the brown/black togethor to the ecu Pin C17 on ECU: Throttle pedal: Ground Pin 4 on connector: Pin C34 on ECU: Throttle pedal ECU +5V Pin 3 on connector: Pin C15 on ECU: Throttle pedal: Sub Pin 2 on connector: Pin C28 on ECU 5- White/Red = Sensor Ground 6- I verified that both 5v wires on the connector are getting 5v, I've verified that they are sensor grounded and have good continuity (. All outputs are switching ground, except the ignition drivers, therefore sinking current from the ECU through the ground connections. the braided shielding around the cable should be connected to a chassis ground (I soldered a length of wire to mine and put a ring terminal on the end and bolted it to the chassis. With the DMM set to continuity or Ohms (resistance), connect one lead to the (-) at the battery and use the other lead to probe all of the sensor ground pins at the harness. I have some questions for my ECU (NS15+). These sensors are all reading as expected, however I have concerns that I spliced into a chassis ground instead of sensor ground. Is the 18AWG enough for the 4 coils? I have not found any information about current thru the sensor ground on the coils. That’s why some of the electrical issues Sensors, if they have the ground isolated from the sensor body (for example TPS, pressure, temperature sensors), they must be grounded to the sensor ground on the ECU, not the engine ground. Throttle module White wire to any spare ECU aux output or ignition drive. All sensors should return to Pin 52 as a protected sensor ground. These are the highest current wires on the ecu. The factory setup has the sensor ground and shield both grounding to the chassis, I am going to be using a 2 wire Bosch sensor with a shielded 2 wire. 1. With ignition on, there is continuity between the sensor ground pins on the G4X connectors and chassis ground / battery. Thanks Michael. 3: Ignition Input: Receives signals from the ignition switch, indicating the engine’s operational status. Looked like a solid connection, almost 0ohm (cheap multimeter, so this could be a solid connection even if I measure slightly above 0ohm) I'm running the Thunder and have alot of pressure and temp sensors. . The voltage should then be tested between the sensor ground pin and the reference ground using a digital Hello Guys, i have some questions about sensor ground and shield. If the ECU is using the same reference point for ground as the sensor, then any ground offset is minimized. The wiring diagrams in the help file said as much, but its nice to have a confirmation that they are both technically the same thing once they are inside the ECU. Car was running well for months then out of the blue, would miss/backfire for a split second at higher rpm and under load. You can confirm a blown sensor ground track by opening the ECU and examining the tracks near the sensor ground pins. The tacho could either be Long story short, I think its a grounding issue due to the wide variety of inputs that cause this problem. at . Grounding the sensor body is thus useful for single wire and three wire sensors. The main AEM power ground (usually black wire) should not be connected to the ecu, this should go to chassis or engine block. 3V peak to peak max voltage), Variable second order highpass and lowpass filters; UEGO controller power ground goes to a good vehicle ground. 4 Ohm on both Sensor grounds via back probing to the ecu Sensor ground pin), I pack probed both the APS Main and APS Sub outputs from the APS harness and they both show ~1. Sent from my motorola one 5G ace using Tapatalk 2000 S4 - Daily 1989 MR2 Supercharged (Turboed) 06 I attempted to make a subharness for an ethanol, oil temp/pressure and fuel pressure sensor by splicing into existing 5v, sensor ground, and 12v (for the ethanol sensor) lines on my OEM harness. are all 5v (some are 8v (excluding temp which just needs the sensor ground)) and need to be grounded About your sensor offset issue, that should never be an issue regardless of where the ECU main (power) ground is, because the sensor grounds should all be grounded to the sensor ground terminal(s) of the ECU itself, so that the reference is maintained for As Andre mentioned the sensor ground must return to the ECU. Position Sensor. So the distinction isnt important Most other ecu's Ive wired always have a totally separate pin for sensor grounds. The reason why the heater element exists is that modern O2 sensors need to reach a high temperature before they can give off accurate readings, preventing emission increases when the vehicle is cold or idling. The diagram is a little deceiving b/c the grounding of the shielding to the knock sensor ground wire and chassis happens inside the car right next to the ECU rather than in the engine bay. Disconnect the sensor again, and measure the Sensor resistance with your DMM set to OHMs mode; measure between the sensor wire and ground. Do you have a wiring diagram? Questions & Answers. i would say reconnect the other wire. Thanks for all the input as well because it was very helpful. The signal is listed as a 12v pulsed output so you should be able to run the signal wire to a Digital input (DI) and then ground the ground wire to the ECU sensor ground. Air Gap between the sensor and trigger wheel should be roughly 0. The most common cause of a blown ECU sensor ground is wiring an O2 sensor heater wire to the sensor ground wire instead of to the chassis (body or engine) ground wire. It has only two wires. pdf Yes the AEM analog ground needs to be connected to the ECU sensor ground. Log showed that Cam Sync Tooth was Highly important sensor ground for CLT, IAT, TPS, O2. So the idea is if the signal ground is connected to the ecu sensor ground then it is referencing the same ground as the ignition output (no offset). This is what PULSES and what the ECU Reads. Mindfreakattack. The GM sensor is a VR sensor, both wires should go to whatever device is reading as a sensor ground and signal. 3V peak to peak max voltage), Variable second order . Because flex fuel sensors are a frequency based input, this sensor needs to be wired into a digital pulsed I should mention Before noticing the sensor ground in the ECU was blown I also had a blown IAT sensor in the 2g MAS. my ecu lists sensor ground which I know is used for sensors, I now know power ground ECM Ground & 5 Volt Interactive Wiring Testing, using the interactive wiring diagram system. If you are fitting an aftermarket trigger, the Crank signal needs to go to pin B16, the cam signal needs to go to pin B12. Red - +5V Output 10. If you follow any online forum where vehicle wiring is discussed it won’t take long before you come across a debate about the best way to ground your ECU. 3V peak to peak max For the LS coils the signal ground pin ideally connects to ECU sensor ground, having said that, as you say many people just ground both ground pins together on the head and I have yet to see it cause a problem. Hi all, Is the ECU ground that pair of wires that sit right I was watching the Panhard videos, and would be really interested if you could give some tips and images on how you terminate the shielded portion of the wire to the ecu sensor ground. A – Ignition signal from ECU B – Logic ground, connect to ECU sensor ground C – Spark wire ground, connect to cylinder head D – Power ground, connect to battery negative E – 12 volt power. 100% (Open) 0. Power supply voltage: This wire provides the necessary power to the MAF sensor. ground (short - Verify 900-2000 ohms circuit) is detected. Last edited: at . There are 7 grounds in the interior. When this DTC is active, all sensors connected to I was going to run this with 5V sensor supply from the ECU, Signal ground to ECU, and piggyback the signal to both the gauge and an AVI on the ECU. So today we are going to get our nerd on and look at the theory of electronic circuits and help you figure out the optimal grounding solution for your particular See more When your car ECU grounding is bad, your car engine will cranks and the car headlight will dim. 1WBO Vs 2WBO Rcal 3 WBO Heater +12V (fused) 4WBO Heater 5WBO VGND 6WBO Ip WBO Ip WBO VGND 3 1. As you say, just 1 wire to ground (or sensor ground from the ECU), and the other to the ECU input. The pressure sensor has a feed, signal return and a sensor ground so I can try that grounded to the ecu sensor ground too. I started probing back through my harness, and found that I have continuity between my ECU sensor grounds (Green / Black wires) and the Chassis ground. Ignition 1 Ignition Amplifier Drivers. Red - Trigger Sensor Power 7. In the connector end, you need to connect pin 1 to ecu 5V, Pin 5 to ground, Pin 9 to the ECU Also showing a continental sensor that isn't reading properly. And the power ground fixed to chassis or engine. When wiring crank and cam position sensors, can I combined the shield wires with the sen Ensures a stable ground connection for the entire system. Ensure that the MAP sensor is securely **Note: The sensor ground must be grounded at the ECU Sensor ground and NOT the chassis. This approach reduces the likelihood of ground loops, which can introduce noise and interfere with sensor signals. Posted March 12, 2016. Various 5V engine sensors receive their power supply through one of the 5V power supply groups from the PCI ECU (D420). Quote; Mindfreakattack. e. The other will go to the Di. Identify the sensor ground pins as there are usually one to four pins. However, I cant seem to get a reading. xls Delica MPI wiring. Black - Ground 5. 0% (Closed) 4. Make sure you only ground them at one end though to avoid any ground loops. Sensor wiring 2. Again, consult a service manual or online source for proper testing procedures and expected readings. The factory cars the CAS "ground" pin connected to ecu sensor ground so effectively sensor ground is coupled to the engine block. Sensor Pin 1: X60004. The ECU features multiple power ground pins. Adamw. I get similar readings on some parts of the engine, but not on the ECU strangely enough (the sensor gets its ground from the ECU after all). Community Member 18 Posts United Kingdom. However, some ECU vendors recommend the sensor ground, so I would check the ECUMaster documentation, or contact their support with that question to be sure. Inspect the voltage indicated (e. Do not ground this to chassis, wire this to the ECU Sensor Ground . The regrounding establishes a new reference plane not only for the sensor but also for the ECU and will likely improve the ECU ground overall. That means that the sensor is open. A – Ignition signal from ECU B – Logic ground, connect to ECU sensor ground C – Spark wire ground, connect to cylinder head D – Power ground, connect to battery negative E – 12 volt power . The logic grounds go into the ECU to an internal ground plane, and then eventually into the main harness which grounds on the thermostat housing. 6V-84%. I have the 2 grounds from the ECU (black) going to each rotor housing separately and the sensor ground (green) is isolated from the other grounds and is a closed loop with only the sensors and the ECU. 41v No matter what. adzer adam morrison. Sensor ground is pin 92 on a 2G DSM ECU and pins 17 and 24 on a 1G DSM ECU. (In an electrical system, a ground loop or earth loop occurs when two points of a circuit both intended to be at ground reference potential have a potential between them. 8k ECU model: All of them; Serial Number: 0000; By grounding sensors to the ECU, they benefit from a more controlled electrical environment, resulting in improved sensor performance, responsiveness, and accuracy. Use spare Ignition Channels for Auxiliary Outputs. Without it the ECU may be referencing a different point to the sensor voltage. Will this work fine? The gauge also has a signal +5v and signal ground. But I am not able to trace continuity from the OEM connector sensor grounds to the ECU Sensor Ground pins. Is there a right or wrong way when grouping sensors? I was looking at keeping all the high priority sensors together like TPS, MAP, IAT, ECT, fuel and oil pressure on the same sensor ground/+5 volt pins. Do not use a power ground to analogue sensors, mayhem can ensue :) so things like: Temp sensors, and pressure transducers, and strain gauges, and position stuff, and potentiometers etc. ECU Master EMU manual only states that the shielded cable should be connected to ground. 10 hours ago, Adamw said: Normal practice is coils/ignitors should be grounded to the cylinder head and as per Stevies comment the sesnor grounds should be connected to ECU sensor ground only. As to whether the Link can accept a VR signal, they would need to confirm. Im not sure if it is better to connect sensor ground to the ground pin or not but it generally works ok in the factory cars so I probably would connect sensor ground as well. That is right on the threshold where the ecu considers it "high" so it may upset the sync. Help/Rules: Calendar: Help/Rules: Calendar: ECUs, ECU Tuning and Programming Want to find out how to extract optimal performance from your ECU? This section is for discussions involving ECUs and engine electronics. Members; 120 ECU model: GT+4; Serial Number: 58058; Author; Report; Posted MAF sensor: This is the main component that measures the airflow entering the engine. Moderators; 21. will this work on a 22re motor with a haltech system; Sensor ground should only run from sensors to the sensor ground on the ecuas the name kinda implies, and as the instructions tell you. The "system ground" wire should be connected to the ECU "sensor ground" pin, not to the engine or chassis. Could this be related, possibly the IAT sensor is shorting out? Thanks for any help! Jun 2, 2017 #2 bling5tatus. ADDITIONAL INFORMATION: 1. The high current melts the ECU's sensor ground foil. – For voltage sensors: Join the black wire to ground and the red wire to the signal output wire. 150 (302) 538. Clean or Replace Sensors: Faulty sensors can provide incorrect information to the ECU, leading to problems. ECU sensors never ground to the engine block Also never join the ecu sensor ground wires to the engine block it must go only to the sensors 15-06-2006, 09:33 AM #107. 2. This appears to go with the star point grounding method (In this case the Negative Battery Post). VIP Member 540 Posts Canada. so i had a innovative lc1 wired to my ecu sensor ground , for some reason it fried my sensor ground, so i sent the computer back to ecm link and got it repaired, i have since removed the lc1 . This is based on the calculated resistance in the temperature sensor (basically a thermally variable resistor). The ECU monitors the current through the 2nd 5V line through the temp sensor to ground and infers temperature. I'm curious do all the sensor grounds on the link ecu need to be connected to something? I'm having an issue in a different post I made but I'm curious if what is happening is that one of the sensors grounds is specifically for say the analog inputs? If so this may explain why my map and TPS are not working and all I need to do is connect the [Archive] NB2 ECU sensor ground ECUs, ECU Tuning and Programming. Which then since both the cam and crank sensors would be more conventional style hall sensors, I would re-splice the current single ground supply at the ecu connector from chassis ground to sensor ground. Throttle module White/Green to ECU aux output 2 or 4. Notice the cam sensor only comes down to about 1. Descriptions for each of the terminals are stamped on the sensor housing for easy identification. and if neither of these I am able to trace continuity from the sensor grounds on the OEM connectors to the OEM 52 pin connector. When I probe from ECU Chassis Ground to ECU sensor ground, I see about 1M ohm of Sensor ground only has to return the current of the sensor power supply as well as any pull-up that may be in the circuit. Blue wire is the SENSOR GROUND. 6V ~16%. Questions & Answers. The ground wire from the MAF to the ECU terminates in the ECU. 2nd March 2024, 01:08. 2: ecu sensor ground pin, wire, crimp, shield wire. This includes the crankshaft Negative Trigger signal. Wiring info is in the Link help file. You see no change in the ECU pin voltage from 1. MrZebra. Sensor malfunction. Causes of Bad ECU Ground. Connect the ground pin to a sensor ground on the ECU, and the power supply pin (if present) to either a 5v sensor supply pin, or a switched 12v source. Hi All, I've attached a picture and PDF for my current wiring thought process for my e36 project and wanted to get some final feedback for my game plan. A good sensor should read between a few tens of Ω to a few hundred Ω. Tutor 1332 Posts New Zealand. Details. Second bit of logic then - your most important sensors are those in the engine. temp sensor instructions? Trig 1 and Trig 2 are also bundled, should I be connecting Fury ECU sensor ground to the OEM ECU's sensor ground? Thanks! Delica ECU Pinout. Teeson111 Adam, Can you please help confirm my wiring design to wire up a BMW relcutor crankshaft sensor and a hall effect camshaft sensor to a Fury G4X ecu. View Profile View Forum Posts Private Message regular fella Conversion King. Not chassis ground as you are suggesting. One side of the sensor will be ground. They should not be connected together. Wire number 1 to the knock sensor input on the ecu and number 2 to the sensor ground on the ecu. Not externally combined with power grounds. CAUTION! Turbosmart recommends calibrating the position All Nissan CAS short the sensor ground to engine ground through the mounting as you have discovered. The power ground would just go to a good chassis or engine ground. I'm using the following items for the build: Link PnP G4X Link MXS Dash XS Expansion Loom Boost Solenoid Ethanol Sensor Pressure Sensor for Fuel my ecu grounds to the upper intake manifold which obviously is connected to engine block hence i would presume thats part of the star point where ever a battery ground is called upon the engine block (in this case upper intake manifold) would suffice as that battery ground? usually ECU sensor ground is the most appropriate. Red - Lamda Sensor + 9. Deg C (Deg F) Temperature Sensor Output (mV) 0 (32) 2630. Target Voltage (V) Duty Cycle. Power ground is provided to the ECU e. FC owner here, I used a wire in ECU but I think it is the same in the end. *1 – OEM ECU does not join sensor ground to power ground internally like most aftermarket ECUs do and grounds it separately back to the engine head . Notice that it also connects to the Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU) Knock input 1. Adam from Link has written a post somewhere saying to wire as per Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU) Knock input 1. Normally, the factory harness has a sensor ground that terminates on the rotor housings. These types of faulty sensors can imitate ECU failure symptoms. Posted August 26, 2021. 2V, rather than zero. 6 you chose any left pin of the Y adapter. 2-4. As I understand the shield ground pins (A7) are also connected to Sensor ground pins (A25). It is essential to establish a dedicated ground connection back to the “sensor ground” pins on the ECU, ensuring a clean and reliable signal transmission. Honda's distributor outputs a "rising edge" signal so the connections to our ecu are reverse polarity. Pin 1 on the ECU -> Sensor Ground (white) on the LC1 Pin 16 on the ECU -> Heater Ground (blue) on the LC1 Pin 15 on the ECU -> Status LED Ground (black) on the LC1 Pin 23 on the ECU -> WB Output (brown) on the LC1 And finally, the yellow NB output on the LC1 is connected to nothing, as I haven't wired the gauge in yet. The other grounds are engine to chassis "free" wires (i. Are you sure it has the right value pull-up resistor on the LH inlet cam? Is the cam sensor ground connected to ecu sensor ground? The LC-1 has a separate "analog/system ground" wire and a "heater ground" wire. Corrosion is the most common cause of a bad ECU ground. For ana-log sensor inputs, such as temperature sensors, this Most automotive sensors output a voltage level and the ECU needs a clean reference or ground level to compare this to in order to make a measurement and correctly interpret the sensor Connect ALL 4 power grounds to the engine block. Please Avoid ground loop. This works fine provided the ground path for any other high current device connected to the engine has low resistance directly to the battery, otherwise the high current device may find an easier ground path through the CAS ground. 3V peak to peak max O2 Sensor Ground; O2 Sensor Signal; The 4 wire lambda sensor has two grounds, one for the heater and the other for the sensor itself. 030” – 0. It usually has a sensing element and a temperature sensor. Analog/Sensor Ground. 060” (try Actually, that is not quite right above. Then using plug D for the other pressure and temp sensors. Throttle pin 4 to any ECU AN Volt input Throttle pin 5 to ECU 5V. A few of these sensors (Map sensor, oil pressure, fuel pressure) have a 5v, sensor ground Brilliant, you can connect the MAP sensors ground and signal output like the pinout suggest, but instead of X60004. Members; 5 ECU model: Link Fury G4+ Serial Number: 26933; Black- body ground Brown to Pin #24 (Sensors Ground) White to Pin #15 (EGR Temp sensor) I swapped the input in ECMLink (to EGR) just to check if it works and it doesn't. Run wires out through the firewall and ground with a lug, either to the block, or to the stock ECU ground point by the wiper motor. Doing so guarantees the MegaSquirt ECU and sensors are using the same ground reference. 6 +5V Supply If your wideband controller has a seperate analog ground and power ground, then connect the analog ground to the ECU sensor ground on the expansion. The ECU (E01) and its sensor input (E02) is grounded at the intake manifold yes same place same bolt same ring, the other 2 grounds on the ECU are outputs (E1 diagnostic plug ground output) and (E2 sensor ground output which your TPS uses). However the supplied wiring diagram states that the sensor ground wires reference back to the Battery Negative terminal along with the main ECU ground. Ground connections: These wires ensure the MAF sensor has a proper ground connection to complete the circuit. Although it does list one as sensor and the other power without noting which pin is which. hofsk keiq rcza obdcn gizxlruw objce lanj tlbr grq aew