Help please: car won't start after installing wideband. **UPDATED! :)
Here's the story. Yesterday evening I installed my BNIB AEM UEGO. I finished up late in the evening and when I went to start the car the car wouldn't start. I examined what I thought might be a few problem areas but it was cold and late so I stopped. I resumed the search today, the first thing I did was open the ECU box to check my wiring as I had wired the 12V source from the wideband to pin #43/#38 which is ignition switch (B15/B14). Well somehow when I was working in there late last night I must have broken the connection. I fixed the broken wire and decided while I was in there that I would change the 12V power for the wideband from ignition switch to the Malfunction indicater lamp. With ignition switch the wideband gets power when the engine is cranking but with using the MIL pin #22/#18 (B15/B14) the wideband receives no power during engine cranking, which is what I want, yet still receives 11-14 volts with the engine running. Perfect! I closed everything up and the car still will not start.
- 2001 Sentra SE w/ PP
- SR20VE w/ B14 Calum R/T
- no issues with starting at all before this last AEM adventure
The car has full battery power/the starter is fine and the engine cranks. All accessories work. I have traced any and all wiring that I have done on the car.
I have checked:
- all relevant fuses (fuel/spark/ecm/engine control/electrical etc)
- fuel pump/fuel pump relay
- all relevant wiring/engine harness where I could
- has lots of fuel
- ECM relay
The only relay I think might be a problem is the ignition relay because the ignition switch wire was broken when I tried to start the car last night. I am not sure if it was partially touching or not. But the ECM relay and engine conrol fuses are all okay and the ECU appears to be working fine. I have not checked the ignition relay as it is in a near impossible place to get at behind the fuse block under the dash. I am really hoping not to have to take off the dash. So my question is, would the car crank if the ignition relay was toast? I am not even sure if the ignition switch pin is run through the ignition relay. I don't think it is as I believe it is only fused in the engine fuse box. I can not find it stated as such in the FSM for the B14 or B15.
Am I missing something here? Any suggestions would be appreciated!
Why won't my car start??
- 2001 Sentra SE w/ PP
- SR20VE w/ B14 Calum R/T
- no issues with starting at all before this last AEM adventure
The car has full battery power/the starter is fine and the engine cranks. All accessories work. I have traced any and all wiring that I have done on the car.
I have checked:
- all relevant fuses (fuel/spark/ecm/engine control/electrical etc)
- fuel pump/fuel pump relay
- all relevant wiring/engine harness where I could
- has lots of fuel
- ECM relay
The only relay I think might be a problem is the ignition relay because the ignition switch wire was broken when I tried to start the car last night. I am not sure if it was partially touching or not. But the ECM relay and engine conrol fuses are all okay and the ECU appears to be working fine. I have not checked the ignition relay as it is in a near impossible place to get at behind the fuse block under the dash. I am really hoping not to have to take off the dash. So my question is, would the car crank if the ignition relay was toast? I am not even sure if the ignition switch pin is run through the ignition relay. I don't think it is as I believe it is only fused in the engine fuse box. I can not find it stated as such in the FSM for the B14 or B15.
Am I missing something here? Any suggestions would be appreciated!
Why won't my car start??
Last edited by B15NEOVVL
on 2011-11-12
at 20-30-27.