B1C70

DTC Troubleshooting: B1C70

DTC B1C70:

Driver's Main Heater Switch Failure

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.
- The seat heater control unit does not turn on the seat heater until the seat core temperature is 85 degrees or less. Make sure the seat core temperature is below 85 degrees before troubleshooting.

1. Clear the DTCs with the HDS.

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

3. Check for DTCs with the HDS.

Is DTC B1C70 indicated?

YES -

Replace the seat heater control unit Service and Repair.

NO -

Intermittent failure, the circuit is OK at this time. Check for loose or poor connections between the seat heater control unit and the driver's seat heater.