With Climate Control

DTC Troubleshooting: B1202

DTC B1202: Climate 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 climate control system in several modes.

3. Check for DTCs using the HDS.

Is DTC B1202 indicated?
YES - The climate control unit is faulty, replace the climate control unit. Climate Control Unit Removal/Installation (With Climate Control)

NO - Intermittent failure, the climate control unit is OK at this time. Check for poor connections at the HVAC control unit, and at G402.