LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> Power Door Locks Inoperative - Passenger Door

Power Door Locks Inoperative - Passenger Door

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Power Door Locks Inoperative - Passenger Door

Step Action Yes No
Schematic Reference:  Door Lock/Indicator Schematics  
Connector End View Reference: Power Door Systems Connector End Views 
DEFINITION: One or all 3 of the passenger door lock actuators do not operate, or, the front passenger door lock switch does not operate.
1 Did you perform the Door Systems Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Door Systems 
2 Verify that the Power Door Locks Inoperative - Passenger Door fault is present.
Do the door locks operate as described in the Power Door Locks Description and Operation?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 If the vehicle is a four door model, are all 3 of the passenger doors locks inoperative from both door lock switches? Go to Step 10  Go to Step 4 
4
  1. Install a scan tool.
  2. Close all of the vehicle doors.
  3. With the scan tool, observe the RF Door Lock Switch parameter in the Data Display, Inputs list of the body control module (BCM).
  4. Operate the front passenger door lock switch to both the lock and unlock positions.
Did the parameter change to both the Lock and Unlock states?		 Go to Step 7  Go to Step 5 
5
IMPORTANT: If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to voltage.
  1. Disconnect the harness connector of the front passenger door lock switch.
  2. Connect a 3-amp fused jumper wire between the lock switch lock signal circuit of the harness connector and a good ground.
  3. Observe the RF Door Lock Switch parameter.
  4. Connect the 3-amp fused jumper wire between the lock switch unlock signal circuit of the harness connector and a good ground.
  5. Observe the RF Door Lock Switch parameter.
Did the scan tool parameter change to the both the Lock and Unlock states?		 Go to Step 6  Go to Step 8 
6 Connect the 3-amp fused jumper wire between the lock switch lock signal circuit and the ground circuit of the harness connector while observing the appropriate scan tool parameter.
Did the scan tool parameter change to the Lock state?		 Go to Step 11  Go to Step 14 
7
  1. Disconnect the harness connector of the inoperative door lock actuator.
  2. Connect a test lamp between the door lock actuator lock control circuit and the door lock actuator unlock control circuit of the harness connector.
  3. Operate the front passenger door lock switch to the LOCK and UNLOCK positions.
Did the test lamp illuminate in both positions?		 Go to Step 13  Go to Step 9 
8 Test the signal circuits of the front passenger door lock switch for a short to ground or an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 12 
9 Test the lock control circuit of the suspect door lock actuator for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 10 
10
IMPORTANT: If all 3 passenger door locks are inoperative from both door lock switches, test the unlock control circuit between the splice and the body control module (BCM) for an open.
Test the unlock control circuit of the suspect door lock actuator for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.Did you find and correct the condition?		 Go to Step 18  Go to Step 12 
11 Inspect for poor connections at the harness connector of the front passenger door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 15 
12 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 16 
13 Inspect for poor connections at the harness connector of the inoperative door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 17 
14 Repair the open ground circuit of the front passenger door lock switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 18  -
15 Replace the front passenger door lock switch. Refer to Mirror, Window, and Door Lock Switch Replacement .
Did you complete the replacement?		 Go to Step 18  -
16 Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System.
Did you complete the replacement?		 Go to Step 18  -
17 Replace the inoperative door lock actuator. Refer to Lock Actuator Replacement - Front Door .
Did you complete the replacement?		 Go to Step 18  -
18 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
scientia non olet · About LEMON Manuals