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Old 04-20-2002, 06:48 PM   #2
PKRWUD
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Hi Bob,
Code 15 means there is a problem with either the ROM or the KAM. If it was a KOEO code, it's the ROM, and if it was in continuous, it's the KAM. The test is simple. Disconnect the 60 pin connector from the ECM, turn the key "on" (do not try to start it), and measure the voltage between pin 1 (pos. test lead) and either pin 40 or 60 (neg. test lead) in the ECM harness connector. If you have 10.5 vdc or more, the ECM is bad, and needs to be replaced. If you do not have 10.5 vdc, you need to trace the wires and find out why.

Code 85 means there is a problem with the solenoid that controls the flow from the charcoal canister. Check the wires.

The code 15 is likely being caused by an electrical short, which may have damaged the ECM, and is most likely creating your drivability problem.

Take care,
-Chris
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