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Symptom: DRIVER DOOR LOCK SWITCH INPUT OPEN OR SHORT TO VOLT- When Monitored and Set Condition: DRIVER DOOR LOCK SWITCH INPUT OPEN OR SHORT TO VOLTAGE - BCM When Monitored: At all times when battery power is supplied to the Body Control Module. Set Condition: When the BCM senses voltage to the door lock switch above 4.6 volts for over 10 seconds. POSSIBLE CAUSES DTC PRESENT BODY CONTROL MODULE - DRIVER DOOR LOCK SWITCH VOLTAGE LOW DOOR LOCK SWITCH GROUND OPEN DOOR LOCK SWITCH MUX CIRCUIT OPEN DOOR LOCK SWITCH OPEN DOOR LOCK SWITCH MUX CIRCUIT SHORT TO VOLTAGE BODY CONTROL MODULE - DOOR LOCK SWITCH MUX SHORT TO VOLTAGE TEST ACTION APPLICABILITY 1 With the DRBIII t, record and erase DTC’s. Cycle the ignition switch from ON to OFF to ON. t, read DTC’s. Remove the key and operate the door locks from the Driver Door Lock Switch while t. Wait 10 seconds. t display DR DOOR LOCK SW INPUT OPEN OR SHORT TO VOLTAGE? All Yes → Go To 2 No → Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. 2 With the DRBIII t in Sensors, read the DR DOOR LOCK SW voltage. Does the DRBIII t display 4.3 volts or greater? All Yes → Go To 3 No → Disconnect the BCM harness connector(s). Check connectors - Clean/repair as necessary. If okay, replace the Body Control 921 POWER DOOR LOCKS/RKE |