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Cabin Heater Inoperable From A/C - Heater Module (MTC)

Test 1 - 2:




Test 3 - 4:






SYMPTOM
CABIN HEATER INOPERABLE FROM A/C - HEATER MODULE (MTC)

POSSIBLE CAUSES
- DCHA activation criteria not met
- No PCI bus communication with FCM/HVAC module
- FCM or HAVC DTCs present
- FCM fault
- A/C - heater control module fault
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