11-19-2018, 09:00 AM
Ok i think i have found the problem. After finding 0v at TPS and MAP, and .45mv at ECM pin A5. I disconnected the grey/red wire from the harness at the ECM, and reference (pin A5) voltage popped up to a, steady clean 5.00v.
I have reference voltage back!!!
I have a couple questions for you, if you dont' mind.
Would a, short or disconnected pin A5 to TPS ( no supply voltage) cause the ECM kill the fuel pump relay ? Or is that going to be a separate problem?
Knowing that the grey/red wire to the TPS or MAP sensor is shorted, should I
A) run a new wire to the TPS and MAP,
B) pull the harness from the ECM to the sensors, and inspect/repair?
I'm crossing my fingers that the grey/red shorted caused the ECM to fail to energize the FP relay.
Thank you again for all you're documentation.
I've read near every page i found on the obdii 16v and it has been a blessing. understanding how the 16v circuits work and the ecm logic makes it much less frustrating
I have reference voltage back!!!
I have a couple questions for you, if you dont' mind.
Would a, short or disconnected pin A5 to TPS ( no supply voltage) cause the ECM kill the fuel pump relay ? Or is that going to be a separate problem?
Knowing that the grey/red wire to the TPS or MAP sensor is shorted, should I
A) run a new wire to the TPS and MAP,
B) pull the harness from the ECM to the sensors, and inspect/repair?
I'm crossing my fingers that the grey/red shorted caused the ECM to fail to energize the FP relay.
Thank you again for all you're documentation.
I've read near every page i found on the obdii 16v and it has been a blessing. understanding how the 16v circuits work and the ecm logic makes it much less frustrating