Join Date: Jul 2006
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i have detailed wiring diagrams with me
checked BAT+ at Connector 1157 pin 14DG/LG wire, 11.48v present.
checked for ground at C1157 pin 26 BK/W, ground good.
measured resistance from PCM C154 pin 48 GY/W to IDM C1157 pin 4, 0 ohms.
measured resistance between PCM C154 pin 48 and common ground wires pins 51,76,77,& 103. infinitity found.
measured resistance between pcm C154 pin 48 and common 12V wires pins 55,71,&97. 0 ohms measured on each wire with key on engine off, indicating a short to power on the EF feedback signal wire. I proceded down the circuit to the large square connector above center of engine held together with 10mm head bolt. disconnected connector with DVOM still connected and meter read infinity, indicating fused wires in harness leading to engine.
well, i reconnected large connector, and meter reads infinty. indicating no short. this is where i am stumped in my diagnosis. short of ripping the harness out to peel away sheathing, i find no short. telling me i my have a faulty pcm. harness costs as much as pcm.
What to do... what to do.... what to buy...?
sorry for long post, i thought if i read what i had done, i could see if ihad gone wrong somewhere in diagnosis.
thanks for any suggestions.