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• When Monitored: • Set Condition: Possible Causes (C105) HVAC MUX CONTROL CIRCUIT SHORTED TO GROUND INSTRUMENT CLUSTER (CCN) A/C HEATER CONTROL Diagnostic Test 1. VERIFY DTC B1082-HVAC MUX CIRCUIT LOW IS ACTIVE Turn the ignition on. With the scan tool, erase CCN DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read CCN DTCs. Does the scan tool display active: B1082–HVAC MUX CIRCUIT LOW? Yes >> Go To 2 No >> Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1). 2. CHECK FOR DTC B1082-HVAC MUX CIRCUIT LOW WITH A/C HEATER CONTROL C1 HARNESS Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase CCN DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read CCN DTCs. Does the scan tool display: B1082–HVAC MUX CIRCUIT LOW? Yes >> Go To 3 No >> Replace the A/C Heater Control in accordance with the Ser- vice Information. Perform BODY VERIFICATION TEST - VER 1. (Refer to 24 - 274 HVAC - ELECTRICAL DIAGNOSTICS LX |