Troubleshooting Hints
- Malfunction of the connector [joint connector (CAN1), A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > connector improperly connected]
- Malfunction of the wiring harness [open circuit between the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > connector and the joint connector (CAN1), power supply circuit to the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >]
- Malfunction of the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >