Power Door Latch System Malfunction
Power Door Latch System Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
When either exterior door handle is lifted, switched ground signals are sent to the driver door module (DDM) or front passenger door module (PDM) and the remote control door lock receiver (RCDLR) through the LF or RF door handle switch signal circuits. Upon receipt of these inputs, the DDM or PDM and the RCDLR will check the status of the power door lock system. Control of the power door latches is dependent on the door lock status. If the status of the door lock system is UNLOCK, the power door latches will electrically release after lifting the exterior door handle. If the status of the door lock system is LOCK, one of the following inputs will be required before the latch will release:
* A door unlock switch activation
* A door key cylinder unlock switch activation
* An active keyless entry unlock command
* A passive keyless entry unlock command message is received by the DDM or PDM from the RCDLR
Once the enable criteria has been met, the DDM or PDM will supply power and ground to the door latch motor control circuits and the door will release.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Power Door Latch Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Driver Door Module Driver Door Handle parameter while using the exterior driver door handle. The parameter should change between Active and Inactive.
• If the value does not change between the commanded states, refer to Door Handle Lift Switch Malfunction.
2. Observe the scan tool Passenger Door Module Passenger Door Handle parameter while using the exterior passenger door handle. The parameter should change between Active and Inactive.
• If the value does not change between the commanded states, refer to Door Handle Lift Switch Malfunction.
3. Observe the scan tool Remote Control Door Lock Receiver Ext. Driver Door Handle Switch parameter while using the exterior driver door handle. The parameter should change between Active and Inactive.
• If the value does not change between the commanded states, refer to Door Handle Lift Switch Malfunction.
4. Observe the scan tool Remote Control Door Lock Receiver Ext. Psgr. Door Handle Switch parameter while using the exterior passenger door handle. The parameter should change between Active and Inactive.
• If the value does not change between the commanded states, refer to Door Handle Lift Switch Malfunction.
5. Command the LF latch solenoid ON and OFF with a scan tool. The LF door latch should LOCK and UNLOCK when changing between commanded states.
• If the LF latch does not LOCK or UNLOCK, refer to Power Door Latch Malfunction.
6. Command the RF latch solenoid ON and OFF with a scan tool. The RF door latch should should LOCK and UNLOCK when changing between commanded states.
• If the RF latch does not LOCK or UNLOCK, refer to Power Door Latch Malfunction.
Circuit/System Testing
Door Handle Lift Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate exterior door handle switch assembly and the X1 harness connector at the RCDLR.
2. Test for less than 10.0 ohms between the ground circuit terminal 6 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Door Handle Switch parameter is Inactive.
• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the door module.
4. Install a 3A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Door Handle Switch parameter is Active.
• If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door module.
5. Connect the X1 harness connector at the RCDLR and disconnect the X2 harness connector at the door module.
6. Verify the scan tool Remote Control Door Lock Receiver Ext. Door Handle Switch parameter is INACTIVE.
• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the RCDLR.
7. Install a 3A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Remote Control Door Lock Receiver Ext. Door Handle Switch parameter is Active.
• If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the RCDLR.
8. If all circuits test normal, test or replace the exterior door handle switch assembly.
Door Handle Unlatch Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate exterior door handle switch.
2. Test for less than 10.0 ohms between the ground circuit terminal 3 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, doors UNLOCKED, verify a test lamp illuminates between the signal circuit terminal 4 and ground.
• If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the door control module.
4. Disconnect the X1 harness connector at the door module.
5. Verify a test lamp does not illuminate between the signal circuit terminal 13 and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage.
6. If all circuits test normal, test or replace the exterior door handle switch.
Power Door Latch Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
2. Test for less than 10.0 ohms between the control circuit terminal listed below and ground.
* RHD terminal 9
* LHD terminal 4
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door control module.
3. Test for less than 10.0 ohms between the control circuit terminal listed below and ground.
* RHD terminal 8
* LHD terminal 3
• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door module.
4. Connect a test lamp between the control circuit terminals listed below.
* RHD terminal 8 and terminal 9
* LHD terminal 3 and terminal 4
5. Command the Latch Solenoid ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
• If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the door module.
6. If all circuits test normal, test or replace the door latch assembly.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
2. Install a 15A fused jumper wire between one of the control terminals and 12V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the door latch should perform the LOCK/UNLOCK functions.
• If it does not perform as specified, replace the door latch
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Front Side Door Outside Handle Replacement (Service and Repair)
* Front Side Door Lock Replacement (Front Side Door Lock Replacement)
* Control Module References (Programming and Relearning) for DDM, PDM, or RCDLR replacement, setup, and programming