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B263D B263E, B263F, B2656 INTAKE DOOR MOTOR HAC-57 < COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P Is the inspection result normal? YES >> GO TO 3. NO >> Replace auto amp. Refer to VTL-8, "Removal and Installation" 3. CHECK SIGNAL FOR AUTO AMP. Confirm A/C LAN signal between auto amp. harness connector M37 terminal 3 and ground using an oscillo- scope. Is the inspection result normal? YES >> GO TO 4. NO >> Replace auto amp. Refer to VTL-8, "Removal and Installation" 4. CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR Check voltage between intake door motor harness connector M126 terminal 3 and ground. Is the inspection result normal? YES >> GO TO 5. NO >> Repair harness or connector. 5. CHECK SIGNAL FOR INTAKE DOOR MOTOR Confirm A/C LAN signal between intake door motor harness connector M126 terminal 1 and ground using an oscilloscope. (+) ( −) Voltage Auto amp. — Connector Terminal M37 20 Ground Battery voltage (+) ( −) Voltage Auto amp. — Connector Terminal M37 3 Ground SJIA1453J (+) ( −) Voltage Intake door motor — Connector Terminal M126 3 Ground Battery voltage |