Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Lock Status Indicator Control | 1 | 1 | 1 | -- |
Passenger Door Lock Status Indicator Control | 1 | 1 | 1 | -- |
Driver Door Lock Status Indicator Low Reference | -- | 1 | 1 | -- |
Passenger Door Lock Status Indicator Low Reference | -- | 1 | 1 | -- |
1. Door Lock Indicator Malfunction | ||||
Circuit/System Description
The driver door module (DDM) and front passenger door module (PDM) control the door lock status indicators for their respective doors. The DDM and PDM provide power and ground to the indicators to illuminate when the lock system is activated. The indicators only illuminate for approximately 5 seconds after lock switch activation or a door handle has been operated. When the door is open, the door lock status indicators cycle ON/OFF. The remote control door lock receiver (RCDLR) receives RFA transmissions and communicates with the door control modules for lock and unlock commands.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the door lock indicators ON and OFF with a scan tool. The indicators should turn ON and OFF when changing between the commanded states.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate door lock status indicator.
- Verify that a test lamp illuminates between the low reference circuit terminal B and B+.
- Ignition ON, verify that a test lamp does not illuminate between the low reference circuit terminal B and ground.
- Connect a test lamp between the control circuit terminal A and the low reference circuit terminal B.
- Command the lock switch indicator ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If all circuits tests normal, test or replace the door lock status indicator.
| ⇒ | If the test lamp does not illuminate, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the appropriate door control module. |
| ⇒ | If the test lamp illuminates, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the door control module. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the door control module. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the door control module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for DDM or PDM replacement, setup and programming |
