Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION:
The door key cylinder lock feature is inoperative when locking doors using
the door key cylinder.
|
1
| Was the Body Control Module Diagnostic System Check performed?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Body Control System
in Body Control System
|
2
|
- Disconnect the inoperative key cylinder lock switch electrical
connector.
- Use a test lamp to backprobe between B+ and the key cylinder lock
switch harness connector terminal C.
Does the test lamp light?
| --
| Go to
Step
3
| Go to
Step 5
|
3
|
- Turn the ignition switch to the LOCK position.
- Disconnect BCM connector C2.
- Using a J 39200
DMM,
measure the resistance between the key cylinder lock switch harness connector
terminal A and the BCM harness connector C2 terminal C11.
Is the resistance less than the specified range?
| 10 ohms
| Go to
Step 4
| Go to
Step 6
|
4
|
- Insert key in inoperative door cylinder lock and rotate lock to
unlock position.
- Using a J 39200
DMM,
measure the resistance between the door lock cylinder switch connector terminals A
and C.
Is the resistance less that the specified range?
| 2 ohms
| Go to
Step 7
| Go to
Step 8
|
5
| Repair poor connection
or open in CKT 750.
Is the repair complete?
| --
| Go to
Step
9
| --
|
6
| Repair poor connection or open in CKT 780.
Is the repair complete?
| --
| Go to
Step
9
| --
|
7
|
- Inspect the BCM connector C2 terminal C5 for poor
terminal contact.
- If the BCM connector C2 terminal C5 is OK, replace
the BCM. Refer to
Body Control Module Replacement
in Body Control Systems.
Is the repair complete?
| --
| Go to
Step
9
| --
|
8
| Replace the key lock cylinder switch. Refer to
Door Lock Cylinder Replacement
in Doors or Lock
Cylinder Replacement - Liftgate in Body Rear End.
Is the repair complete?
| --
| Go to
Step
9
| --
|
9
|
- Turn the ignition switch to the LOCK position.
- Reinstall connectors/components removed.
- Turn the ignition switch to the RUN position for 6 seconds.
- Turn the ignition switch to the LOCK position.
- Remove the BCM PRGRM fuse.
- Turn the ignition switch to the ACC position. (The BCM sounds
the chime a number of times equivalent to the BCM type installed on the vehicle).
- Within one second, turn the ignition switch from the ACC position,
to the LOCK position, then back to the ACC position. (The BCM sounds and
DTCs stored).
Are there any BCM DTCs present?
| --
| Go to
Diagnostic System Check - Body Control System
in Body Control System
| System OK
|
