Step
| Action
| Value(s)
| Yes
| No
|
|
Important: A short to ground will cause an open fuse(s). Before performing this
diagnostic procedure, inspect the fuse(s) for an open.
|
1
| Was the system check performed?
| --
| Go to
Step 2
| Go to
Power Door Locks System Check
|
2
| Perform the body control module (BCM) diagnostic system check.
Are any door lock DTCs present?
| --
| Go to
Body Control Module System Check
| Go to
Step 3
|
3
|
- Connect a scan tool to the data link connector (DLC).
- Monitor the BCM door unlock relay output while activating the
door lock switch to the unlock position.
Does the output change from OFF to ON?
| --
| Go to
Step 4
| Go to
Step 12
|
4
|
- Remove the unlock relay at the left IP junction block.
- Connect a test lamp to ground and use J 35616
.
- Frontprobe the left IP junction block unlock relay terminal 85
(CKT 194).
- Activate the door lock switch to the unlock position.
Does the test lamp light?
| --
| Go to
Step 7
| Go to
Step 5
|
5
|
- Connect a test lamp to ground.
- Backprobe the left IP junction block connector C1 terminal F8.
- Activate the door lock switch to the unlock position.
Does the test lamp light?
| --
| Go to
Step 6
| Go to
Step 9
|
6
| Replace the left IP junction block.
Is the repair complete?
| --
| Go to
Power Door Locks System Check
| --
|
7
|
- Use J 39200
in order to measure resistance between the unlock relay terminal 86 CKT 150
and ground.
- Activate the door lock switch to the unlock position.
Does the measured resistance equal the specified value?
| <1 ohms
| Go to
Step 8
| Go to
Step 6
|
8
| Replace the door
lock relay.
Is the repair complete?
| --
| Go to
Power Door Locks System Check
| --
|
9
|
- Connect a test lamp to ground.
- Backprobe the BCM connector C3 terminal B3.
- Activate the door lock switch to the UNLOCK position.
Does the test lamp light?
| --
| Go to
Step 10
| Go to
Step 11
|
10
| Repair the open or short to ground in CKT 194 between the BCM
and the left IP junction block connector C1.
Is the repair complete?
| --
| Go to
Power Door Locks System Check
| --
|
11
|
- Inspect for a poor connection at the BCM connectors.
- Replace the BCM if there is no poor connection found at the BCM.
Is the repair complete?
| --
| Go to
Power Door Locks System Check
| --
|
12
|
- Use J 39200
connected to ground.
- Backprobe the BCM connector C2 terminal A2.
Does the measured voltage equal the specified value?
| 12--14V
| Go to
Step 13
| Go to
Step 11
|
13
|
- Use J 39200
connected to ground.
- Probe the BCM connector C2 terminal A2.
- Activate either lock switch to the UNLOCK position.
Does the DMM equal the specified value?
| 12--14V
| Go to
Power Door Locks System Check
| Go to
Step 14
|
14
| Replace the lock switch(es) which did not pull voltage to 4-7 volts.
Is the repair complete?
| --
| Go to
Power Door Locks System Check
| --
|
