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HAC-94 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING] POWER SUPPLY AND GROUND CIRCUIT POWER SUPPLY AND GROUND CIRCUIT A/C SWITCH ASSEMBLY INFOID:0000000011276639 1. CHECK OPERATION 1. Press the AUTO switch, and then check that “AUTO” is shown on the display. 2. Operate the temperature control dial (driver side). Check that the fan speed or outlet changes. (The dis- charge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera- ture, and temperature setting.) Does it operate normally? YES >> Inspection End. NO >> Perform trouble diagnosis for the A/C switch. Refer to HAC-94, "A/C SWITCH ASSEMBLY : Diag- . A/C SWITCH ASSEMBLY : Diagnosis Procedure INFOID:0000000011276640 Regarding Wiring Diagram information, refer to 1. CHECK A/C SWITCH POWER SUPPLY 1. Disconnect the A/C switch connector. 2. Turn ignition switch ON. 3. Check voltage between A/C switch harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 2. 2. CHECK FUSE Check 10A fuse [No. 20, located in the fuse block (J/B)]. NOTE: . Is the inspection result normal? YES >> GO TO 3. NO >> Replace the blown fuse after repairing the affected circuit. 3. CHECK A/C SWITCH POWER SUPPLY CIRCUIT FOR OPEN 1. Check continuity between A/C switch harness connector and fuse block (J/B) harness connector. Is the inspection result normal? YES >> Inspection End. NO >> Repair harness or connector. 4. CHECK A/C SWITCH GROUND CIRCUIT 1. Turn ignition switch OFF. (+) ( −) Voltage (Approx.) A/C switch Connector Terminal M51 4 Ground Battery voltage A/C switch Fuse block (J/B) Continuity Connector Terminal Connector Terminal M51 4 M34 16R Yes |