TX Failure (Active)

Tests 1 - 3:

Test 4:

SYMPTOM
TX FAILURE (ACTIVE)

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
- Check for additional HVAC DTCS
- Attempt to communicate with the PCM and CTM
- A/C - heater control module
- Intermittent wiring problem