Is there continuity?
YES -
Repair a short to ground in the wire.?
NO -
Replace the driver's MPCS unit.?
B2181
DTC Troubleshooting: B2181
DTC B2181:
Driver's Door Lock Knob Switch LOCK/UNLOCK Signal Error
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting
- B-CAN System Diagnosis Test Mode A.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Lock and unlock the driver's door with the door lock knob switch.
4. Check for DTCs with the HDS.
Is DTC B2181 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the driver's door lock knob switch system is OK at this time. Check for loose or poor connections between the driver's MPCS
unit and the driver's door lock actuator.?
5. Select DOOR LOCK from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.
6. Check the ON/OFF information of the Driver's Door Lock Knob Switch (LOCK) and Driver's Door Lock Knob Switch (UNLOCK) in the
DATA LIST.
Does the Driver's Door Lock Knob Switch (LOCK) information indicate ON and Driver's Door Lock Knob Switch (UNLOCK) information
indicate OFF with the door lock knob switch is in the LOCK position, and does the Driver's Door Lock Knob Switch (LOCK) information indicate
OFF and Driver's Door Lock Knob Switch (UNLOCK) information indicate ON with the door lock knob switch is in the UNLOCK position?
YES -
Replace the driver's MPCS unit.?
NO -
Go to step 7.
7. Disconnect the driver's door lock actuator 10P connector.
