Fail-Safe Table (Additional Heater System)
Precautions: General safety (00)
When any of the following DTCs is detected, ECM enters fail-safe mode as long as malfunction continues to exist.
| DTC | DTC name | Fail-safe operation |
|---|---|---|
B1536 
|
Additional Heater Relay No.1 Output Malfunction | ECM turns off additional heater relays No.1, No.2 and No.3. |
| B1537
|
Additional Heater Relay No.2 and No.3 Output Malfunction |