DTC B1000: Communication Bus Line Error
- Clear the DTCs using the HDS.
- Cycle the ignition switch to OFF, and then back ON.
- 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 (see BATTERY TEST ) and the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING ).
- Check for DTCs using the HDS.
Are DTCs B1005, B1006, B1007, B1008, and B1010 also indicated?
YES -Go to step 5.
NO -Replace the MICU.
- 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
- Door multiplex control unit
- Climate control unit
- Combination switch control unit
- HandsFreeLink control unit
- Power seat 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.