Central Control Module (CCM)

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The Delayed Interior Lighting (DIL) relay will be enabled once the CCM receives a wake-up signal. CKT 1393 is then pulled to ground at the CCM. Once the relay is turned "ON," voltage will appear on CKT 823 to the various courtesy lamps and systems using CKT 823. The relay will stay powered for 10 minutes after the ignition is shut "OFF." This is a separate function from the "Retained Accessory Power (RAP)" system.

TEST CONDITIONS

When the CCM is attempting to activate the DIL relay, CCM attempts to activate DIL relay whenever it gets a wake-up signal.

FAILURE CONDITIONS

CKT 1393 (delayed interior lights enable) is in a high state for more than 2 seconds while the CCM is attempting to activate (ground) the DIL relay. This fault may also set a DTC 25 because of the illuminated entry feature.

ACTION TAKEN

DTC 22 stored and possibly with a DTC 25 depending on when the fault occurs due to the dependency of the illuminated entry function on DIL.

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 1393.

2. This test checks for a shorted relay coil.

3. This test checks for a shorted relay or defective CCM.

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

If CKT 1393 is shorted to battery, the courtesy and roof rail, glove box, etc., lamps will not come "ON" as intended.

A Tech 1 can be used to activate the DIL relay.