Gentlemen,
REF: previous posts/threads were under the subject: "Help: where to buy GM style electrical connectors"
the car: 1994 Olds 88 Royale, 3800 engine, L27
Two scan codes are persistant/current:
- P0321 - 18X Interrupts Lost
- P0341 - Intermittent Cam Signal
I did the pertinent continuity/ohm tests on the wiring to cam and crank sensors, ICM, 8 way jumper harness, and PCM.
I tried a new crank position sensor: same codes. The cam position sensor was recently replaced by the owner.
I just performed the diagnostic procedure on the Spark Reference Circuit. The Spark Reference voltage at the PCM backplane, pin RB6, is 2.92V with engine running. GM Spec calls for 2.5V.
In a similar test, Fuel Control, pin RB8, is 2.45V. Spec calls for 2.5V. Seems ok here.
What do you think? Is the SWS/amp or Buffer/Amp in the ICM bad, requiring replacement of the ICM?
TIA Bill
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