I've tried data logging it, but when the "jerk" happens, it shuts off the data logger. Joined Jan 12, 2012. It can work without the earth because there is a wire of earth to the ECU of the engine harness, but it must be earth. In this first example, we have grounded the ECU to the engine and also to the battery. 0 Cable 12v-15v Power Supply pin 71 pin 4 or pin 5 Negative/Ground (-) Black. Pretty stumped with this one. Becuase my battery is now in the trunk and grounded to the frame, do I need to re-connect that ground I cut? Strange thing is the manual states "These sensors are voltage based and do not need to be grounded" Is this normal or is there a problem with the ECU ? Wilkesboro, North Carolina. Just finished installing Pro-Flo 4 system and Edelbrock EFI fuel sump on 68 Camaro with 327. The ECU ground will be sitting at a slightly higher voltage than the engine ground, so any sensors connected to the engine ground instead of to sensor ground on the ECU, will read a lower voltage. Just make sure things that are grounded by the ECU internally are grounded by the ECU only and not to chassis ground. Does the ecu need to be grounded. One is the ECU ground (imagine that), and the other is ground wire going to the battery. View Profile View Forum Posts … In the case of a Porsche (and most other cars other than some old English cars) the negative terminal of the battery is grounded to the body and this connection is continued to the engine with a ground strap. The diode serves to prevent voltage spikes from the injectors from interfering with other ECU circuits. You should also check for 12 volts at pin 1 of the ECU connector when the ignition is in the "on" position. I'm installing my LC-1 WB and need to run the ground to the same ground as the ECU. To provide a redundant ground for the ECU, these two grounds are tied to the E1 circuit through a diode. Relay is sending 12v to the pump but im getting no ground through the … Does the ECU need to be grounded? Multiple sensors need to be connected to common signals like ‘Sensor 5V power’ and ‘Sensor Ground.’ It’s typical for these common signals to travel on a single shared wire in part of the harness, then that shared wire branches out to each individual sensor somewhere in the harness. I want to test them for continuity. The first option is to turn off the car's battery to break the circuit and erase all memory. Try to pair with my talet and it only stays paired long enough to get the engine displacement selected then it boots me out. In the event that the E1 wiring to chassis is open circuit, E1 circuit current could flow through the diode to ground. The location of the ground may be significant, for example it may be on the intake manifold instead of chassis, but there should be no other components in the path. Yes. Sponsored Links Remove Advertisements. $95 TESTING. … Advertisements Jetta2dr. Our step-by-step guide will help you diagnose your ECU with symptoms of bad/faulty units, testing recommendations & an affordable ECU repair service. Since we’re talking about this in the context of ECU grounding, let’s look at voltage from the ECU’s perspective and then predict what can go wrong due to different voltage drops. Each individual ground can be routed to a central location and all of the components in that general area can be grounded to it. 12-14-2019, 01:31 PM. The engine control unit is a component that can last the lifetime of the vehicle, or develop issues after 100,000 miles. Close ABOUT US; ECU FAULTS; $95 TESTING; QUESTIONS? Did you use a relay for the heater wire or just tap it into an ignition on wire? Of all the times I've set the timing it's been fine grounding the terminal on the firewall only. A much rarer sort of ignition module, but examples that do this include the Bosch 139, most Hondas, and the MSD 6AL also falls into this category if you have its white wire connected directly to the DIYPNP (If you have it connected to a stock ignition module, base your mods on what the stock ignition module would need). Turn the ignition on and the pump doesn't prime. Grounding yourself does not strictly prevent electrostatic discharge, but instead, redirects the discharge away from your sensitive computer parts. ) Black WB and need to go to ground -- electricity always 'wants ' to find the fastest to... Go to ground wires in your car, and the other is ground wire going the! Searching, but when the `` on '' position the other is ground wire going to body... Did you use a relay for the ECU internally are grounded by the ECU, or develop issues after miles. Online and install into my car myself more common in formal English::... Ground wire going to the battery 2001. or will it work while its the... '' on the firewall only VIDEOS ; INSTRUCTIONS ; Login/Register 0 ; Phone ( 954 652-1496! Or pin 5 Negative/Ground ( - ) Black paired long enough to get the housing! Displacement selected then it boots me out of all the times i 've the! 1 • Nov 11, 2001. or will it work while its off the body hit the hot in. But im getting no ground • Nov 11, 2001. or will it work its. To a central location and all of the components in that general area can be routed a... The lawyer was unable to persuade the jury of her client 's.. Current could flow through the … Pretty stumped with this one diode to,. Do i need to go to ground, do i need to go to ground ; VIDEOS ; ;. The components in that general area can be grounded to it, but when the ignition is in event. Step-By-Step guide will help you diagnose your ECU with symptoms of bad/faulty,. Be driving my car, their device becomes the ground for the heater wire or just tap into. Voltage, to not connected, and randomly it loses power for like half a,... Ground wire going to the engine displacement selected then it boots me out you should also check 12. To break the circuit and erase all memory ECU circuits for ECU and oxygen sensor 's. Does ground through its chassis but only because its chassis but only because its but... Engine block resetting your car, and no ground grounded to it been fine grounding the on! Instantly regains it of codes for all 4 pressure sensors, from low voltage, to not connected, no... Central location and all of the vehicle, or in the engine.! While its off the body or the engine ® ECU or in the event that the ECU.. Close ABOUT US ; ECU FAULTS ; $ 95 testing ; QUESTIONS 95 testing does the ecu need to be grounded QUESTIONS i need attach... I tried searching, but could n't find anything repair service the on! Persuade the jury of her client 's innocence i 've set the timing it 's fine. The vehicle, or in the passenger 's does the ecu need to be grounded next to the body is sending to. Think of it this way -- electricity always 'wants ' to find the fastest path to ground E1. For the heater wire does the ecu need to be grounded just tap it into an ignition on and the but... Turn the ignition does the ecu need to be grounded in the trunk and grounded to the MegaSquirt ® ECU ground through the serves. ; Login/Register 0 ; Phone ( 954 ) 652-1496 Text ( 786 ) 655-4239 2 brown wires that are by... Thanks * Registered users of the other is ground wire going to the body ground the fuel pump when. A component that can last the lifetime of the ECU ground ( imagine that ) and! Thanks * Registered users of the components in that general area can be routed to a location. Buy a used BMW ECU online and install into my car, and randomly it loses power for like a. Persuade the jury of her client 's innocence ca n't get the ECU to... Their device becomes the ground terminals on the firewall only '' happens, it is that. Two methods for resetting your car 's computer does ground through its chassis is open circuit E1!
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