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Symptom: *A/C - HEATER CONTROL ILLUMINATION INOPERATIVE POSSIBLE CAUSES CHECK FOR INSTRUMENT CLUSTER (MIC) DTCS INOPERATIVE BULB(S) A/C - HEATER CONTROL MODULE PANEL LAMPS DRIVER CIRCUIT OPEN INSTRUMENT CLUSTER TEST ACTION APPLICABILITY 1 Turn the ignition on. t in Body, Electro/Mech Cluster (MIC), read DTCs. Does the DRBIII t display any DTCs? All Yes → Refer to the Instrument Cluster category for the related symp- tom(s). No → Go To 2 2 Turn the Headlamp switch on. All Yes → Go To 3 No → Go To 4 3 For Dual-Zone HVAC systems, proceed directly to the conclusion of this test and All Yes → Replace the A/C - Heater Control Module in accordance with the Service Information. No → Replace the inoperative bulb(s). Perform BODY VERIFICATION TEST - VER 1. 397 HEATING & A/C |