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 PCM that it is OK to turn "ON" the fuel injectors because the CCM has seen a valid key match.

DTC WILL SET WHEN

This DTC will set after a valid key match, IGN 1 is "ON," and CKT 229 stays "low" (2.5 volts or less) 2 seconds or more after the CCM has enabled the fuel to turn "ON."

ACTION TAKEN

DTC 33 will set. Vehicle can still start

DTC WILL CLEAR WHEN

This DTC will clear after IGN 1 is turned

DTC CHART TEST DESCRIPTION

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

1. This test checks for 5 volts at the CCM, supplied by the PCM on CKT 229.

2. This test checks for a short to ground or open in CKT 229.

DIAGNOSTIC AIDS

If the DTC is a history DTC, the problem may be intermittent. Try performing the test shown while "wiggling" wiring and connectors; this can often cause the fault to appear. Check for poor connections at both the CCM and the PCM connector; these could cause an open or an intermittent fault. Refer to "Intermittents/History DTCs". Intermittents/History DTCs A Tech 1 can be used to monitor the fuel enable circuit.