TX Failure (Active) - MTC

Test 1-3:

Test 4:

SYMPTOM
TX FAILURE (ACTIVE) - MTC

WHEN MONITORED
When the ignition is on.

SET CONDITION
This DTC will set if the A/C - Heater Control Module is unable to send a message.

POSSIBLE CAUSES
- Attempt to communicate with the HVAC module
- Additional code(s) present
- Attempt to communicate with the PCM/ECM, BCM, and FCM
- A/C - heater control module