Unknown Fault Detected (Active)

Test 1:

SYMPTOM
UNKNOWN FAULT DETECTED (ACTIVE) - MTC

TEST NOTE
This symptom is diagnosed using the test A/C FAULT (ACTIVE) - MTC.

WHEN MONITORED
With the ignition ON.

SET CONDITION
This DTC will set if the A/C-Heater Control Module detects an internal fault.

POSSIBLE CAUSES
- A/C - heater control module