B1000

DTC B1000: Communication Bus Line Error (BUS Off)

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with 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, or worn/shorted wires. If the connections are good, check the battery condition and the charging system.

4. Check for DTCs with the HDS.

Are DTCs B1005, B1006, B1007, B1008, B1010, B1011 and B1032 indicated?

YES - Go to step 5.

NO - Replace the MICU.




5. Disconnect the appropriate connector at each control unit in the table one at a time. Clear the DTC, then recheck for DTCs after each unit is disconnected.

Is DTC B1OOO indicated with each individual unit disconnected?

YES - Go to step 6.

NO - Replace the control unit that was disconnected and B1000 did not reset.




6. Disconnect all of the appropriate connectors for each of the units in the table.
7. Disconnect under-dash fuse/relay box connectors X (39P), N (45P), J (30P), G (8P), D (17P).




8. Check for continuity between each of the under-dash fuse/relay box terminals listed in the table above and body ground.

Is there continuity?

YES - Repair a short in the wire between the under-dash fuse/relay box and the connected control unit.

NO - Go to step 9.

9. Check for voltage between each of the under-dash fuse/relay box terminals listed in the table above and body ground.

Is there 1 V or less?

YES - Replace the under-dash fuse/relay box.

NO - Repair a short in the wire between the under-dash fuse/relay box and the connected control unit.