Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION:
The door key cylinder unlock feature is inoperative when unlocking doors using
the door key cylinder.
|
1
| Refer to the service parts identification label for RPO
UA6. Refer to General Information.
Is the vehicle equipped with the content theft deterrent (RPO UA6)?
| --
| Go to
Step 2
| Go to
Step 5
|
2
|
- Disconnect the inoperative key cylinder lock switch electrical
connector.
- Connect a test lamp between B+ and the key cylinder lock switch
harness connector terminal C.
Does the test lamp light?
| --
| Go to
Step
3
| Go to
Step 6
|
3
|
- Turn the ignition switch to the LOCK position.
- Disconnect the BCM connector C2.
- Use a J 39200
in order to measure the resistance between the key cylinder lock switch harness
connector terminal D (terminal B when checking the liftgate
lock) and the BCM harness connector C2 terminal C5.
Is the resistance less than the specified value?
| 10ohms
| Go to
Step 4
| Go to
Step 7
|
4
|
- Insert a key in the inoperative door cylinder lock. Rotate the
lock to the unlock position.
- Use a J 39200
in order to measure the resistance between the door lock cylinder switch connector
terminal C and terminal D (terminals B and C when checking
the liftgate lock cylinder).
Is the resistance less than the specified value?
| 2ohms
| Go to
Step 8
| Go to
Step 9
|
5
| The door key unlock feature is only available on vehicles
equipped with the content theft deterrent (RPO UA6).
| --
| --
| --
|
6
| Repair the
poor connection or the open in CKT 750.
Is the repair complete?
| --
| Go to
Step
10
| --
|
7
| Repair the poor connection or the open in CKT 781.
Is the repair complete?
| --
| Go to
Step
10
| --
|
8
|
- 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 Systems.
Is the repair complete?
| --
| Go to
Step
10
| --
|
9
| Replace the key cylinder lock switch. Refer to
Door Lock Cylinder Replacement
in Doors.
Is the repair complete?
| --
| Go to
Step
10
| --
|
10
|
- Turn the ignition switch to the LOCK position.
- Re-install the connectors/components that were 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).
- Turn the ignition switch from the ACC position, to the LOCK position
and back to the ACC position within 1 second. (The BCM sounds any DTCs
stored).
Are there any BCM DTCs present?
| --
| Go to
Diagnostic System Check - Body Control System
| Go to
Automatic Door Locks System Check
|
