DTC 58

DTC 58 Chart:

PASS-Key II Fuel Enable Circuit:

CIRCUIT DESCRIPTION
DTC 58 is an indication that the fuel enable input has failed after a good signal was received in a given engine run cycle. The PASS-Key�II system enables engine operation by: 1. Allowing the starter motor to engage. 2. Issuing a fuel enable signal to the PCM. Once the engine is running the PCM continuously monitors the fuel enable signal, testing for a circuit or PASS-Key�II module failure that would prohibit a positive fuel enable on future ignition cycles. The PCM will not cancel fuel injection after it has been approved within a given ignition cycle. Therefore, stalling conditions cannot be the result of PASS-Key�II system failures.

DTC 58 WILL SET WHEN
- PASS-Key II fuel enable input is not correct but has been correct within this engine run cycle.
- Engine run indication asserted.
- PASS-Key II engine start timer expired.

ACTION TAKEN (PCM WILL DEFAULT TO)
- With a current DTC 58 set, the PCM will not illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).
- PASS-Key II system fail message on Driver Information Center (DIC).
- PCM will enable fuel injection on future ignition cycles regardless of the PASS-Key II enable input status.

DTC 58 WILL CLEAR WHEN
The fault no longer exists.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. If engine will crank, then part of the PASS-Key�II system is operating correctly.
2. Checking PCM output, there will be 2-3 volts present at PCM terminal C8 if the PCM is OK and CKT 229 is not open or shorted.
3. Checking if PCM is recognizing cranking fuel enable signal from the PASS-Key�II decoder module.
4. Checking CKT 229 for a short to voltage or an open. If CKT 229 is OK, PASS-Key�II decoder module is not able to produce a cranking fuel enable signal.

DIAGNOSTIC AIDS
- If DTC 58 is set intermittently the following could be a cause.
- Intermittent short to ground or voltage on CKT 229.
- Intermittent open in CKT 229.
- Intermittent loss of power or ground to the PASS-Key�II module. The PASS-Key�II module reads the ignition key once each ignition cycle when the ignition is first turned "ON," therefore faults in the key pellet and circuits to the ignition lock cylinder can cause a no start but cannot cause a stalling condition.