Procedures For Selecting Crank Position Sensing Decode Mode

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

When you diagnose the crankshaft position 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, using the scan tool, perform the following steps:

Turn the ignition to the RUN/ON position.
Select Engine Output Controls.
Select Crank Position Sensing Decode Mode.
Select the desired mode (Angle, Time "A", or Time "B") by pressing SELECT STATE.
Command the decode mode by pressing COMMAND STATE.

The commanded state remains valid for the current ignition cycle. A specific decode mode can not be commanded with the engine running, or after commanding a desired decode mode. In order to command a different decode mode, you must cycle the ignition OFF and ON.