B1000
DTC B1000: Communication Bus Line ErrorNOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.
Is DTC B1000 indicated?
YES - Go to step 5.
NO - Intermittent failure. The communication bus line is OK at this time. Check for loose or poor connections, or worn/shorted wires. If the connections are good, check the battery condition and the charging system.
5. Check for DTCs with the HDS.
Are DTCs B1008, B1011, and B 1032 also indicated with DTC B1000?
YES - Go to step 6.
NO - Faulty MICU; replace the under-dash fuse/relay box.
6. Turn the ignition switch OFF.
7. Disconnect the appropriate connector at each control unit in the table one at a time. Clear the DTCs, then recheck for DTCs after each unit is disconnected.
Is DTC B1000 indicated with each individual unit disconnected?
YES - Go to step 8.
NO - Replace the control unit that was disconnected and B1000 did not reset.
8. Disconnect the under-dash fuse/relay box connector Q (16P).
9. Check for continuity between the under-dash fuse/relay box connector Q (16P) No. 6 terminal and body ground.
Is there continuity?
YES - Repair the short to ground in the wire.
NO - Go to step 10.
10. Turn the ignition switch ON (II).
11. Check for voltage between the under-dash fuse/relay box connector Q (16P) No. 6 terminal and body ground.
Is there voltage?
YES - Repair the short to power in the wire between the under-dash fuse/relay box connector and the affected control unit.
NO - Faulty MICU; replace the under-dash fuse/relay box.