Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION:
The LOCK and UNLOCK functions of the automatic are inoperative when using
the door lock switches, the key cylinder lock switch or the keyless entry
transmitter. The automatic door lock features are all inoperative.
|
1
| Was the BCM diagnostic system check performed?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Body Control System
|
2
|
- Remove the PWR LOCK fuse.
- Inspect the PWR LOCK fuse.
Is the PWR LOCK fuse open?
| --
| Go to
Step
3
| Go to
Step 4
|
3
|
- Replace the PWR LOCK fuse.
- Press lock, then unlock on either door lock switch.
- Remove the PWR LOCK fuse.
- Inspect the PWR LOCK fuse.
Is the PWR LOCK fuse open?
| --
| Go to
Step
6
| Go to
Step 4
|
4
| Backprobe between the BCM connector C1 terminal H and
ground.
Does the test lamp light?
| --
| Go to
Step
5
| Go to
Step 11
|
5
|
- Manually lock all of the vehicle doors.
- Disconnect the BCM connector C1.
- Connect a 25A fused jumper between the BCM harness connector C1
terminal C and ground.
- Momentarily connect a jumper between B+ and the BCM harness connector C1
terminal A, while observing the driver door lock.
- Momentarily connect a jumper between B+ and the BCM harness connector C1
terminal B, while observing the passenger door lock(s).
Do all of the vehicle doors unlock?
| --
| Go to
Step 10
| Go to
Step 11
|
6
|
- Disconnect the BCM connector C1.
- Connect between B+ and the BCM connector C1 terminal H.
Does the test lamp light?
| --
| Go to
Step
12
| Go to
Step 7
|
7
| Connect a test lamp between B+ and the BCM connector C1 terminal C.
Does the test lamp light?
| --
| Go to
Step
13
| Go to
Step 8
|
8
| Connect a test lamp between the BCM connector C1 terminal C
and ground.
Does the test lamp light?
| --
| Go to
Step
14
| Go to
Step 10
|
9
| Repair the poor connection or open in circuit 1540.
Is the repair complete?
| --
| Go to
Step
15
| --
|
10
|
- Inspect the BCM connector C1 terminal E for a poor
terminal contact. Repair the terminal as needed.
- If the BCM connector C1 terminal E is OK, replace
the BCM. Refer to
Body Control Module Replacement
in Body Control Systems.
Is the repair complete?
| --
| Go to
Step
15
| --
|
11
| Repair a short to ground in circuit 1540.
Is the repair complete?
| --
| Go to
Step
15
| --
|
12
| Repair a short to ground in circuit 1540.
Is the repair complete?
| --
| Go to
Step
15
| --
|
13
| Repair a short to ground in circuit 294 and/or circuit 295.
Is the repair complete?
| --
| Go to
Step
15
| --
|
14
| Repair a short to B+ in circuit 294 and/or circuit 295.
Is the repair complete?
| --
| Go to
Step
15
| --
|
15
|
- 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
|
