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BACKLIGHT DIMMING RX FAILURE For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes FAULTS PRESENT IN THE CLUSTER (MIC) A/C HEATER CONTROL NOT RECEIVING VF DIM MESSAGE AT THE EXPECTED RATE CLUSTER NOT BROADCASTING VF DIM MESSAGE A/C HEATER CONTROL NOT RECEIVING VF DIM MESSAGE Diagnostic Test 1. VERIFY THAT THE BACKLIGHT DIMMING RX FAILURE DTC IS ACTIVE Turn the ignition on. With the DRBIII T , erase HVAC DTCs. Cycle the ignition switch and wait approximately 30 seconds. With the DRBIII T , read active HVAC DTCs. Does the DRBIII T display: Backlight Dimming RX Failure? Yes >> Go To 2 No >> A technician may not have erased this DTC following a module or PCI Bus repair. If possible, verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring harness Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL 2. CHECK FOR DTCs IN THE CLUSTER (MIC) Turn the ignition on. With the DRBIII T , read Cluster DTCs. Does the DRBIII T display any DTCs? Yes >> Diagnose and repair the DTC(s). (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING) for the diagnostic test procedure. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL No >> Go To 3 24 - 4 HVAC - ELECTRICAL DIAGNOSTICS DR/DH |