Central Control Module (CCM)

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

Retained Accessory Power (RAP) is enabled anytime IGN 1 is turned to "RUN." RAP will continue operation of power windows, sunroof, trunk release, radio, and wipers. RAP will stay enabled for up to 10 minutes after an ignition cycle from "RUN" to "OFF" or will shut "OFF" immediately if any door is opened. RAP is enabled when the CCM grounds CKT 707.

DTC WILL SET WHEN

CKT 707 (RAP relay control) is in a low state for more than 2 seconds while the CCM is not enabling the RAP relay circuit. This happens when IGN 1 is "OFF" and a CCM wake-up signal (door handle input, RKE/TD input, door input, courtesy lamp switch input, or IGN 3) becomes active, or if a door is opened within 10 minutes after IGN 1 was turned "OFF."

ACTION TAKEN

DTC 21 stored. If CKT 707 is shorted to ground, the wipers, radio power windows, sunroof, and trunk release will have B+ at all times. If CKT 707 is open, the RAP function will be "OFF" as soon as the ignition is shut "OFF."

DTC WILL CLEAR WHEN

DTC 21 will clear if the fault goes away for 2 or more seconds.

DTC CHART TEST DESCRIPTION

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

1. This test checks for a short to ground in CKT 707.

2. This test checks for normal resistance of the relay coils.

3. This test checks for a shorted relay.

4. This test checks for B+ to relay coils.

5. This test checks for an open on CKT 707.

6. This test checks for poor or damaged connection at the CCM connector, and for normal CCM RAP function.

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 RAP relay connectors; these could cause an open or an intermittent fault. Refer to "Intermittents/History DTCs". Intermittents/History DTCs

A Tech 1 can be used to activate the RAP relays.