The numbers below refer to the step numbers on the diagnostic table.
This step determines if there is a lock actuator control circuit of one of the rear doors shorted to ground. This condition could open the RRDR MDL fuse located in the rear fuse block and simultaneously set DTCs U1162 and U1163 when the rear door lock actuator is actuated.
This step checks to see that the door module associated with the inoperative door lock recognizes the switch inputs.
Turning ON the headlamps in this step eliminates the possibility of the inoperative door lock switch finding an alternative path to ground through the switch illumination circuit, which could result in the scan tool displaying incorrect lock switch states.
This step determines if the lock switch or lock switch circuits are the cause of the malfunction.
If the 3-amp jumper wire fuse opens when the jumper wire is connected, test the appropriate switch signal circuits for a short to battery positive voltage.
This step determines if the unlock circuit may be the cause of the malfunction.
If the test lamp is already illuminated before operating the lock to Unlock, test the door lock actuator Unlock circuit for a short to battery positive voltage.
This step determines if the lock circuit may be the cause of the malfunction.
If the test lamp is already illuminated before operating the lock to Lock, test the door lock actuator Lock circuit for a short to battery positive voltage.
This step directs you to either, inspect for poor connections at the passenger door module , or, at the driver door switch assembly as a pre-requisite to replacing the passenger door module or driver door switch assembly. This is because lock switch signals for the driver door are detected and processed by the driver door switch assembly, while lock switch signals for the passenger door are detected and processed by the passenger door module.
This step directs you to, either replace the passenger door module or driver door switch assembly. This is because lock switch signals for the driver door are detected and processed by the driver door switch assembly, while lock switch signals for the passenger door are detected and processed by the passenger door module.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Door Lock/Indicator Schematics DEFINITION: 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 complaint is present. Does the power door lock 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 |
Did DTCs U1162 and U1163 simultaneously set current when you operated the lock switches? | Go to Step 14 | Go to Step 4 | |
Did the parameter change to both the Lock and Unlock states for a front door switch and (w/V4U)? | Go to Step 7 | Go to Step 5 | |
Did the parameter change state to, first the Lock, and then the Unlock as expected? | Go to Step 6 | Go to Step 10 | |
6 |
Did the parameter change state to Lock as expected? | Go to Step 15 | Go to Step 19 |
Does the test lamp flash once upon operating the switch to UNLOCK? | Go to Step 8 | Go to Step 11 | |
Does the test lamp flash once upon operating the switch to LOCK? | Go to Step 9 | Go to Step 11 | |
9 |
Does the test lamp flash once upon operating the switch to LOCK and once upon operating the switch to UNLOCK? | Go to Step 18 | Go to Step 13 |
10 |
Important:: If a power door lock switch signal circuit is found to be shorted to battery positive voltage, the lock switch may need to be replaced. Test the appropriate signal and ground circuits of the door lock switch for shorts to each other, a short to battery, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 16 |
11 | Test the control circuits of the door lock actuator 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 24 | Go to Step 12 |
12 | Test the control circuits of the door lock actuator 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 24 | Go to Step 17 |
13 | Test the appropriate module logic ground circuit of the C1 connector for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 17 |
14 | Test the control circuits of both rear door lock actuators for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 18 |
15 | Inspect for poor connections at the harness connector of the appropriate door lock switch. 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 24 | Go to Step 20 |
Inspect for poor connections at the harness connector of the appropriate passenger door module, or, if the inoperative lock is the driver door lock, at the harness connector of the driver door switch assembly (DDSA). 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 24 | Go to Step 21 | |
17 | Inspect for poor connections at the harness connector of the appropriate passenger door module or driver door module. 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 24 | Go to Step 22 |
18 | Inspect for poor connections at the harness connector of the inoperative door lock actuator. 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 24 | Go to Step 23 |
19 | Repair the open ground circuit of the appropriate door lock switch. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | -- |
20 | Replace the appropriate door lock switch. Refer to Door Lock Switch Replacement . Did you complete the replacement? | Go to Step 24 | -- |
Replace the appropriate passenger door module, or, if the inoperative lock is the driver door lock, replace the driver door switch assembly (DDSA). Refer to Door Control Module Replacement or Front Door Switch Replacement . Did you complete the replacement? | Go to Step 24 | -- | |
22 | Replace the appropriate passenger door module or driver door module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 24 | -- |
23 | Replace the inoperative door lock actuator. Refer to Front Side Door Latch Replacement or Rear Side Door Latch Replacement . Did you complete the replacement? | Go to Step 24 | -- |
24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |