B1200

DTC B1200: Communication Bus Line Error

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 to LOCK (0), and then back to ON (II).
3. Wait for 6 seconds or more.
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.

NO - If only B1200 is indicated, replace the front climate control unit or A/C control panel.