Code 46, Pass-Key Circuit: Notes

The PASS-Key system is designated to disable vehicle operation if the incorrect key or starting procedure is used. PASS-Key decoder module sends a signal to the PCM if the correct key is being used. If the proper signal does not reach the PCM, the PCM will not pulse the injectors, thus not allowing the vehicle to start. Code 46 will set if proper signal is not being received on fuel enable signal circuit to PCM when ignition is turned on.

1. If engine cranks but does not start, it indicates the portion of the module which generates the signal to the PCM is not operating or fuel enable signal circuit is open, shorted to ground or possibly shorted to voltage. If decoder module is found to be okay, PCM may be at faulty, but this not a likely condition.
2. If Code 46 is stored and engine will not crank, it indicates that there is a Pass-Key problem or incorrect key or starting procedure is being used.