B1200

DTC Troubleshooting: B1200

DTC B1200:

Communication Bus Line Error (BUS OFF)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1200 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at the A/C control panel connector (22P) or front climate control unit connector (30P), and at driver's under-dash fuse/relay box connector N (45P).�

5. Check for DTCs with the HDS.

Is DTC B1000 also indicated?

YES -

Troubleshoot DTC B1000 B1000.�

NO -

If only B1200 is indicated, replace the front climate control unit Front Climate Control Unit Removal/Installation or A/C control panel A/C Control Panel Removal/Installation.�