Without Climate Control

DTC Troubleshooting: B1202

DTC B1202: HVAC Control Unit Internal Error

NOTE:

- Check the battery condition Testing and Inspection and the charging system. Charging System Indicator Circuit Troubleshooting

- 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 DTC with the HDS.

2. Operate the heater-A/C control system in several modes.

3. Check for DTCs using the HDS.

Is DTC B1202 indicated?
YES - The HVAC control unit is faulty, replace the HVAC control unit. HVAC Control Unit Removal/Installation (Without Climate Control)

NO - Intermittent failure, the HVAC control unit is OK at this time. Check for loose connection at the HVAC control unit 30P connector.