Pinpoint Test D: The Door Lock Switches Operate Only One Way
Handles, Locks, Latches and Entry Systems
Pinpoint Test D: The Door Lock Switches Operate Only One Way
Normal Operation
The Remote Function Actuator (RFA) module sends voltage signals to the passenger door lock control switch through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the RFA (Remote Function Actuator) module to lock or unlock all of the doors and send a lock or unlock command to the Driver Door Module (DDM) over the Medium Speed Controller Area Network (MS-CAN).
The DDM (Driver Door Module) sends voltage signals to the driver door lock control switch through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the DDM (Driver Door Module) to send a lock or unlock command to the RFA (Remote Function Actuator) module over the MS-CAN (Medium Speed Controller Area Network).
The door lock control switches have a dedicated ground circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock control switch
- DDM (Driver Door Module)
- RFA (Remote Function Actuator) module
PINPOINT TEST D : THE DOOR LOCK SWITCHES OPERATE ONLY ONE WAY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
D1 RETRIEVE THE RECORDED DDM (Driver Door Module) AND RFA (Remote Function Actuator) MODULE DTCs FROM THE SELF-TESTS
- Check for recorded DDM (Driver Door Module) and RFA (Remote Function Actuator) module DTCs from the self-tests.
Are any DTCs recorded?
Yes
For DDM (Driver Door Module) DTC B2574 or B2575 and RFA (Remote Function Actuator) module DTC B1C37:11 or B1C38:11, GO to Pinpoint Test E. Pinpoint Test E: DTC B1C37:11, B1C38:11, B2574, Or B2575
For all other DTCs, REFER to DTC Charts. Doors, Hood and Trunk
No
GO to D2.
D2 CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH FOR CORRECT OPERATION
- Disconnect: Inoperative Door Lock Control Switch.
- Carry out the door lock control switch component test.
Is the door lock control switch OK?
Yes
If the driver door lock control switch was the switch tested, GO to D3.
If the passenger door lock control switch was the switch tested, GO to D4.
No
INSTALL a new door lock control switch. REFER to Door Lock Control Switch . TEST the system for normal operation.
D3 CHECK THE LOCK AND UNLOCK INPUT CIRCUITS FOR AN OPEN AT THE DDM (Driver Door Module)
- Ignition OFF.
- Disconnect: DDM (Driver Door Module) C501B.
- If the doors do not lock, measure the resistance between the DDM (Driver Door Module) C501B-5, circuit CPK19 (BU/GN), harness side and the LH door lock control switch C541-4, circuit CPK19 (BU/GN), harness side.
- If the doors do not unlock, measure the resistance between the DDM (Driver Door Module) C501B-6, circuit CPK23 (YE/VT), harness side and the LH door lock control switch C541-2, circuit CPK23 (YE/VT), harness side.
Are the resistances less than 5 ohms?
Yes
GO to D5.
No
REPAIR the circuit in question. TEST the system for normal operation.
D4 CHECK THE LOCK AND UNLOCK INPUT CIRCUITS FOR AN OPEN AT THE RFA (Remote Function Actuator) MODULE
- Ignition OFF.
- Disconnect: RFA (Remote Function Actuator) Module C2153E.
- If the doors do not lock, measure the resistance between the RFA (Remote Function Actuator) module C2153E-16, circuit CPK19 (BU/GN), harness side and the RH door lock control switch C605-4, circuit CPK19 (BU/GN), harness side.
- If the doors do not unlock, measure the resistance between the RFA (Remote Function Actuator) module C2153E-17, circuit CPK23 (YE/VT), harness side and the RH door lock control switch C605-2, circuit CPK23 (YE/VT), harness side.
Are the resistances less than 5 ohms?
Yes
GO to D6.
No
REPAIR the circuit in question. TEST the system for normal operation.
D5 CHECK FOR CORRECT DDM (Driver Door Module) OPERATION
- Disconnect all the DDM (Driver Door Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the DDM (Driver Door Module) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new DDM (Driver Door Module). REFER to Driver Door Module (DDM) . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
D6 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
- Disconnect all the RFA (Remote Function Actuator) module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RFA (Remote Function Actuator) module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new RFA (Remote Function Actuator) module. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.