Power Door Locks Inoperative (Rear)
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Power Door Locks Inoperative (Rear)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Vehicle Access Connector End Views |
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| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Activate the front door lock switches to the lock and unlock positions. Do both rear passenger doors lock and unlock? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Is there only one door lock actuator that is inoperative? | Go to Power Door Locks Inoperative - One Door or Switch | Go to Step 4 |
| 4 | Are the rear door lock actuators inoperative for both lock and unlock? | Go to Step 6 | Go to Step 5 |
| 5 | Do the rear door lock actuators lock? | Go to Step 17 | Go to Step 12 |
| 6 | Is the LOCKS fuse open? | Go to Step 24 | Go to Step 7 |
| 7 |
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Go to Step 8 | Go to Step 27 |
| 8 |
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Go to Step 10 | Go to Step 9 |
| 9 |
|
Go to Step 11 | Go to Step 27 |
| 10 |
|
Go to Step 22 | Go to Step 26 |
| 11 |
|
Go to Step 23 | Go to Step 25 |
| 12 |
|
Go to Step 13 | Go to Step 27 |
| 13 | With the test lamp connected to a good ground, probe the lock relay control circuit cavity in the fuse block. Does the test lamp illuminate? |
Go to Step 22 | Go to Step 14 |
| 14 |
|
Go to Step 15 | Go to Step 22 |
| 15 | With the test lamp connected to battery positive voltage, probe the door lock actuator lock control circuit cavity in the fuse block. Does the test lamp illuminate? |
Go to Step 25 | Go to Step 16 |
| 16 |
|
Go to Step 26 | Go to Step 27 |
| 17 |
|
Go to Step 18 | Go to Step 27 |
| 18 | With the test lamp connected to a good ground, probe the unlock relay control circuit cavity in the fuse block. Does the test lamp illuminate? |
Go to Step 23 | Go to Step 19 |
| 19 |
|
Go to Step 20 | Go to Step 23 |
| 20 | With the test lamp connected to battery positive voltage, probe the door lock actuator unlock control circuit cavity in the rear fuse block. Does the test lamp illuminate? |
Go to Step 25 | Go to Step 21 |
| 21 |
|
Go to Step 25 | Go to Step 27 |
| 22 | Test for an open short to ground or short to battery in the door lock relay lock control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 28 |
| 23 | Test for an open short to ground or short to battery in the door unlock relay lock control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 28 |
| 24 | Test for a short to ground in the door lock actuator lock and unlock control circuits. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 27 |
| 25 | Inspect for poor connections at the rear door lock relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 29 |
| 26 | Inspect for poor connections at the rear door unlock relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 30 |
| 27 | Inspect for poor connections at the fuse block. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 31 |
| 28 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 33 | Go to Step 32 |
| 29 | Replace the rear door lock relay. Did you complete the repair? |
Go to Step 33 | - |
| 30 | Replace the rear door unlock relay. Did you complete the repair? |
Go to Step 33 | - |
| 31 | Replace the rear fuse block. Did you complete the repair? |
Go to Step 33 | - |
| 32 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
Go to Step 33 | - |
| 33 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |