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ST-20 < DTC/CIRCUIT DIAGNOSIS > [WITH HEATED STEERING WHEEL] HEATED STEERING WHEEL SYSTEM Is the inspection result normal? YES >> GO TO 9. NO >> Repair or replace damaged parts. 9. CHECK HARNESS BETWEEN A/C AUTO AMP. AND HEATED STEERING WHEEL SWITCH 1. Check continuity between A/C auto amp. harness connector terminal and heated steering wheel harness connector terminal. 2. Check continuity between A/C auto amp. harness connector terminal and ground. Is the inspection result normal? YES >> GO TO 10. NO >> Repair or replace damaged parts. 10. CHECK HEATED STEERING WHEEL SWITCH Check heated steering wheel switch. Refer to ST-9, "HEATED STEERING WHEEL SYSTEM : Heated Steer- . Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-187, "Removal and Installation" (with heat pump) or 347, "Removal and Installation" (without heat pump). NO >> Replace heated steering wheel switch. Refer to ST-46, "Removal and Installation" . Component Inspection (Heated Steering Wheel Switch) INFOID:0000000010119086 1. CHECK HEATED STEERING WHEEL SWITCH 1. Turn power switch OFF. 2. Remove the heated steering wheel switch. Refer to ST-46, "Removal and Installation" . 3. Check continuity between heated steering wheel switch harness connector terminal and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Replace heated steering wheel switch. Refer to ST-46, "Removal and Installation" . 2. CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP Apply a voltage of 12V between the heated steering wheel switch connector terminals to check that the indica- tor lamp turns ON. CAUTION: • Connect the fuse between the terminals when applying the voltage. • To prevent damage, always observe the correct polarity. Heated steering wheel relay Ground Continuity Connector Terminal M7 2 No A/C auto amp. Heated steering wheel switch Continuity Connector Terminal Connector Terminal M55 16 M6 1 Yes A/C auto amp. Ground Continuity Connector Terminal M55 16 No Heated steering wheel switch Condition Continuity Terminal 1 2 While pushing heated steering wheel switch Yes Other condition No |