B1010

DTC B1000: Communication Bus Line Error

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 DTC B1005, B1006, B1007, B1008, B1010, and B1011 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 B1000 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 the 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 the short in the wire between the under-dash fuse/relay box and the connected control unit.

DTC B1010: MICU Lost Communication with the Door Multiplex Control Unit (Panic Message)

NOTE: 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. Check for DTCs with the HDS.

Is DTC B1010 indicated?

YES - Go to step 4

NO - Intermittent failure, the door multiplex control unit is OK at this time Check for loose or poor connection at door multiplex connector A (22P), and at under dash fuse/relay box connector J (30P) If the connections are good, check the battery condition and the charging system.

4. Check for DTCs with the HDS.

Is DTC B1059 indicated?

YES - Go to the Door Multiplex Control Unit Input Test.

NO - Check for an open in the communication circuit between the MICU and the door multiplex control unit If the circuit is OK, replace the MICU If the circuit is bad, repair the open.