B1000

DTC B1000: Communication Bus Line Error

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF and then back ON.
3. Check for DTCs using the HDS.

Is DTC B1000 indicated?

YES - Go to step 4.

NO - Intermittent failure. The communication bus line is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition and the charging system.

4. Check for DTCs using the HDS.

Are DTC B1005, B1006, B1007, B1008, B1009, and B1010 indicated?

YES - Go to step 5.

NO - Replace the MICU.

5. Disconnect each control unit one at a time. Clear the DTC, then recheck for DTCs after each unit is disconnected.
- Gauge control module
- Relay control module
- Driver's multiplex control unit
- Climate control unit
- Combination switch control unit

Is DTC B1000 indicated with each unit disconnected?

YES - Check for a short to power or ground in the communication circuit by disconnecting the harness at each control unit and testing for continuity to ground or short to power. Repair or replace the harness as necessary.

NO - Replace the control unit that was disconnected, and did not set DTC B1000.

DTC B1050: Communication Bus Line Error

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF and then back ON.




3. Check for DTCs using the HDS.

Are DTC(s) B1050, B1100, B1150, B1200, or B1250 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time.

4. Check for DTCs using the HDS.

Is DTC(s) B1000 indicated?

YES - Troubleshoot DTC B1000.

NO - If DTC B1050 is indicated, replace the relay control module. If DTC B1100 is indicated, replace the door multiplex control unit. If DTC B1150 is indicated, replace the gauge control module. If DTC1200 is indicated, replace the climate control unit. If DTC B1250 is indicated, replace the combination switch control unit.