Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION:
The door key cylinder unlock feature is inoperative when unlocking the
doors using the door key cylinder.
|
1
| Did you perform the Automatic Door
Locks System Check?
| --
| Go to
Step 2
| Go to
Automatic Door Locks System Check
|
2
| Inspect the service parts identification label for RPO UA6. Refer
to
RPO Code List
in General
Information.
Is the vehicle equipped with the content theft deterrent (RPO UA6)?
| --
| Go to
Step 3
| Go to
Step 9
|
3
| Did you perform
the BCM Diagnostic System Check?
| --
| Go to
Step 4
| Go to
Diagnostic System Check - Body Control System
in Body Control System
|
4
|
- Open the drivers door.
- Manually lock the drivers door.
- Disconnect the body control module (BCM) connector C2.
- Insert a key in the drivers door cylinder lock.
- Connect a test light between the B+ and BCM harness connector C2
terminal C5.
- Rotate the key to unlock the door while observing the test light.
Does the test light illuminate?
| --
| Go to
Step 7
| Go to
Step 5
|
5
|
- Disconnect the left drivers door key cylinder lock switch electrical
connector.
- Connect a test light between the B+ and the key cylinder lock
switch harness connector terminal A.
Does the test light illuminate?
| --
| Go to
Step 6
| Go to
Step 10
|
6
|
- Connect a digital multimeter (DMM).
- Measure the resistance between the key cylinder lock switch harness
connector terminal B and the BCM harness connector C2 terminal C5.
Is the resistance less than the specified range?
| 2 ohms
| Go to
Step 12
| Go to
Step 13
|
7
|
- Remove the key from the left front door.
- Open the right front door.
- Manually lock the right front door.
- Insert the key into the right front door lock cylinder.
- Connect a test light between the B+ and the BCM harness connector C2
terminal C5.
- Rotate the key to unlock the door while observing the test light.
Does the test light illuminate?
| --
| Go to
Step 14
| Go to
Step 8
|
8
|
- Disconnect the passengers right door key cylinder lock switch
electrical connector.
- Connect a test light between the B+ and the key cylinder lock
switch harness connector terminal A.
Does the test light illuminate?
| --
| Go to
Step 6
| Go to
Step 11
|
9
| The door key cylinder unlock feature is only available on vehicles equipped
with the content theft deterrent (RPO UA6).
Is the action complete?
| --
| Go to
Step 15
| --
|
10
| Repair the poor connection or an open in circuit 750.
Is the repair complete?
| --
| Go to
Step 15
| --
|
11
| Repair the poor connection in circuit 350.
Is the repair complete?
| --
| Go to
Step 15
| --
|
12
| Repair the key cylinder lock switch.
Is the repair complete?
| --
| Go to
Step 15
| --
|
13
| Repair the poor connection or and open in circuit 781.
Is the repair complete?
| --
| Go to
Step 15
| --
|
14
|
- Inspect the BCM connector C2 terminal C5 for a poor
terminal contact.
- If the BCM connector C2 terminal C5 is good, replace
the BCM. Refer to
Body Control Module Replacement
in Body Control System.
Is the repair complete?
| --
| Go to
Step 15
| --
|
15
|
- Turn the ignition switch to the OFF position.
- Reinstall the connectors.
- Reinstall the components.
- Turn the ignition switch to the RUN position for 6 seconds.
- Turn the ignition switch to the OFF position.
- Remove the MALL PGM fuse.
- Turn the ignition switch to the ACC position. The BCM chimes the
same number of times to the BCM type installed in the vehicle.
- Within one second, turn the ignition switch from the ACC position
to the OFF position then back to the ACC position. The BCM will sound any
DTCs that are stored.
Are any BCM DTCs present?
| --
| Go to
Diagnostic System Check - Body Control System
in Body Control System
| Go to
Automatic Door Locks System Check
|
