Central Control Module (CCM)

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The fuel enable circuit is completed by the CCM whenever the PASS-Key(R)II portion in the CCM enables it. This circuit signals the ECM that it is OK to turn "ON" the fuel injectors because the system has seen a valid key match.

TEST CONDITIONS

This DTC will only set once the fuel enable circuitry inside the CCM has been enabled to turn the fuel "ON."

FAILURE CONDITIONS

This DTC will set after a valid key match, IGN 1 is "ON" and this CKT stays "high" most of the time."

ACTION TAKEN

DTC 32 will set.

TEST DESCRIPTION

Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test checks for a short to B+ in CKT 229.

2. This test checks for an internal short to B+ in the ECM.

DIAGNOSTIC AIDS

If the DTC is a history code, the problem may be intermittent. Try performing the test shown while "wiggling" wiring and connectors; this can often cause the fault to appear. Refer to "Intermittents/History Codes/Poor Connections". Intermittents/History DTCs

The Tech 1 can be used to monitor the fuel enable circuit.