Diagnostic Aids

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

When diagnosing CKP sensors, it may be necessary to enable a specific decode mode (ANGLE, TIME A or TIME B). In order to enable a specific crank decode, use scan tool and perform the following:

Turn ignition on.
Select ENGINE OUTPUT CONTROLS.
Select CRANK POSITION SENSING DECODE mode.
Select desired mode (ANGLE, TIME A or TIME B) by pressing SELECT STATE.
Command decode mode by pressing COMMAND STATE.

The commanded state remains valid for current ignition cycle. A specific decode mode cannot be commanded with engine running, or after commanding a desired decode mode. In order to command a different decode mode, ignition must be cycled off and on. For intermittent faults, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.