Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step determines if the unlock control circuit between the splice and the liftgate door lock relay may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Unlock, test the Unlock control circuit for a short to battery positive voltage.
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This step determines if the lock control circuit between the splice and the liftgate door lock relay may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Lock, test the Lock control circuit for a short to battery positive voltage.
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This step determines if the unlock circuit between the liftgate door lock relay and the liftgate door latch assembly may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Unlock, test the Unlock circuit for a short to battery positive voltage. If the 10-amp Rear Hatch Fuse opens when the lock is operated to Unlock, test the Unlock circuit for a short to ground.
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This step determines if the lock circuit between the liftgate door lock relay and the liftgate door latch assembly may be the cause of the malfunction. If the test lamp is already illuminated before operating the lock to Lock, test the Lock circuit for a short to battery positive voltage. If the 10-amp Rear Hatch Fuse opens when the lock is operated to Lock, test the Lock circuit for a short to ground.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: This test is used when only the power door lock system of the endgate/liftgate is inoperative. This test assumes that all DTCs have been diagnosed. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Verify that the Power Door Locks Inoperative - Endgate/Liftgate complaint is present. Does the power door lock liftgate system operate as described in the Description and Operation? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Observe the left rear door lock while operating either one of the door lock switches to both the lock and unlock positions. Does the left rear door lock and unlock as expected? | Go to Step 4 | |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 16 |
5 | Connect the test lamp between the battery positive voltage circuit and the ground circuit of the harness connector. Does the test lamp illuminate? | Go to Step 6 | Go to Step 17 |
Does the test lamp flash once upon operating the switch to UNLOCK? | Go to Step 7 | Go to Step 15 | |
Does the test lamp flash once upon operating the switch to LOCK? | Go to Step 8 | Go to Step 15 | |
Does the test lamp flash once upon operating the switch to UNLOCK? | Go to Step 9 | Go to Step 11 | |
Does the test lamp flash once upon operating the switch to LOCK? | Go to Step 10 | Go to Step 11 | |
10 |
Does the test lamp flash once upon operating the switch to LOCK and once upon operating the switch to UNLOCK? | Go to Step 14 | Go to Step 13 |
11 | Test the Lock and Unlock circuits between the liftgate door lock relay and the liftgate door latch assembly for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 12 |
12 | Test the Lock and Unlock circuits between the liftgate door lock relay and the liftgate door latch assembly for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 13 |
13 | Inspect for poor connections at the harness connector of the liftgate door lock relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
14 | Inspect for poor connections at the harness connector of the inoperative liftgate door latch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
15 | Repair the open or high resistance in the appropriate Lock or Unlock control circuit, between the splice and the liftgate door lock relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
16 | Repair the open or short to ground in the battery positive voltage circuit of the liftgate door lock relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Repair the open ground circuit of the liftgate door lock relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
18 | Replace the liftgate door lock relay. Did you complete the replacement? | Go to Step 20 | -- |
19 | Replace the inoperative liftgate door latch assembly. Refer to Liftgate Latch Replacement in Body Rear End. Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
