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MODE DOOR MOTOR HAC-117 < DTC/CIRCUIT DIAGNOSIS > [MANUAL A/C (TYPE 1)] C D E F G H J K L M A B HAC N O P • Mode door motor does not operate normally. 1. CHECK MODE DOOR MOTOR POSITION BALANCED RESISTOR (PBR) FEEDBACK VOLTAGE 1. Turn ignition switch ON. 2. Using CONSULT, check "MODE FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to 3. Observe "MODE FDBCK" voltage while cycling front air control mode switch through all modes. Is the inspection result normal? YES >> • Mode door motor is OK. • Inspect mode door for mechanical failure. Refer to VTL-19, "Removal and Installation" NO >> GO TO 2. 2. CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND 1. Turn ignition switch OFF. 2. Disconnect the front air control harness connector M180 (A) and the mode door motor harness connector M142 (B). 3. Check continuity between front air control harness connector M180 (A) terminals 19, 20 and the mode door motor harness connector M142 (B) terminals 5, 6. 4. Check continuity between front air control harness connector M180 terminals 19, 20 and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace harness as necessary. 3. CHECK FRONT AIR CONTROL FOR MODE DOOR MOTOR POWER AND GROUND 1. Reconnect front air control harness connector. 2. Turn ignition switch ON. ) mode. 4. Check voltage between front air control harness connector M180 terminal 19 and terminal 20 while pressing the mode ), and then the B/L ( ) mode. Is the inspection result normal? YES >> GO TO 4. Monitor Item Condition Results MODE FDBCK Cycle mode switch through all modes, D/F ( ), VENT ( ), B/L ( ), and FOOT( ) Voltage varies between D/F ( ) and VENT ( ), and between VENT ( ) and B/L ( ). A B Continuity Connector Terminal Connector Terminal M180 19 M142 5 Yes 20 6 Connector Terminal — Continuity M180 19 Ground No 20 AWIIA0364ZZ AWIIA0361ZZ Connector Terminals Condition Voltage (Approx.) (+) (-) M180 19 20 D/F ( ) mode to VENT ( ) mode Battery voltage 20 19 VENT ( ) mode to B/L ( ) mode Battery voltage AWIIA0360ZZ |