DTC 46

Code 46 Chart:

Pass-Key Wiring Diagram Circuit:

CIRCUIT DESCRIPTION:

The PASS-Key system is designed to disable vehicle operation if the incorrect key or starting procedure is used. The PASS-Key decoder module sends a signal to the ECM if the correct key is being used. If the proper signal does not reach the ECM on CKT 229, the ECM will not pulse the injectors "ON" and thus not allow the vehicle to be started.

Code 46 will set, if the proper signal is not being received by the ECM on circuit 229 to the ECM when the ignition is turned "ON." Code 46 does not store in the ECM memory but is only present when the conditions stated above are met.


TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.

1. If the engine cranks, but doesn't start, it indicates that the portion of the module which generates the signal to the ECM is not operating or CKT 229 is open or shorted to ground. If the decoder module is found to be ok, as determined from Body Electrical section the ECM may be at fault. But this not a likely condition.

2. If a Code 46 is stored and the engine will not crank, it indicates that there is a PASS-Key problem or an incorrect key or starting procedure is being used.

DIAGNOSTIC AIDS:

- The fuse for the PASS-Key system is the ECM/IGN fuse.