B2181
DTC Troubleshooting: B2181
DTC B2181:
Driver's Door Lock Knob Switch Input Circuit Malfunction
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A 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 driver's door lock knob switch.
4. Check for DTCs with the HDS.
Is DTC B2181 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
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.
8. 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.
Are both information indicators OFF?
YES -
Faulty driver's door lock knob switch; replace the driver's door latch Service and Repair.
NO -
Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Disconnect driver's MPCS unit connector A (40P).
11. Check for continuity between body ground and driver's door lock actuator 10P connector terminals No. 6 and No. 7 individually.
Is there continuity?
YES -
Repair a short to ground in the wire.
NO -
Replace the driver's MPCS unit Power Windows (Drivers MPCS Unit) Input Test/Replacement.