Backlight Dimming RX Failure (Stored)
Test 1:
SYMPTOM
BACKLIGHT DIMMING RX FAILURE (STORED) - MANUAL A/C
TEST NOTE
This symptom is diagnosed using the test A/C FAULT (STORED) - MANUAL A/C.
WHEN MONITORED
With the ignition ON.
SET CONDITION
If the A/C - Heater Control Module does not receive the dimming function message from the BCM for more than 5 seconds, then the A/C - Heater Control Module LEDs will default to full brightness and the DTC will set.
POSSIBLE CAUSES
- Code(s) become(s) active
- Stored code(s) test complete