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HAC-174 < DTC/CIRCUIT DIAGNOSIS > [MANUAL A/C (TYPE 2)] MODE DOOR MOTOR Is the inspection result normal? YES >> GO TO 4. NO >> Replace front air control. Refer to VTL-7, "Removal and Installation" . 3. CHECK MODE DOOR MOTOR PBR CIRCUITS FOR OPEN AND SHORT TO GROUND 1. Turn ignition switch OFF. 2. Disconnect the front air control harness connector M49 (A). 3. Check continuity between front air control harness connector M49 (A) terminals 23, 26 and the mode door motor harness connector M142 (B) terminals 1, 3. 4. Check continuity between front air control harness connector M49 (A) terminals 23, 26 and ground. Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace harness as necessary. 4. CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND 1. Check continuity between front air control harness connector M49 terminal 21 and mode door motor harness connector M142 terminal 4. 2. Check continuity between front air control harness connector M49 terminal 16 and ground. Is the inspection result normal? YES >> GO TO 6. NO >> Repair or replace harness as necessary. 5. CHECK FRONT AIR CONTROL FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK SIGNAL 2. Turn ignition switch ON. 3. Check voltage between front air control harness connector M49 terminal 23 and terminal 26. Connector Terminals Condition Voltage (Approx.) (+) (-) M49 1 14 Rotating the mode control dial from D/F ( ) mode to VENT ( ) mode Battery voltage 14 1 Rotating the mode control dial from VENT ( ) mode to B/L ( ) mode Battery voltage A B Continuity Connector Terminal Connector Terminal M49 23 M142 3 Yes 26 2 Connector Terminal — Continuity M49 (A) 23 Ground No 26 Connector Terminal Connector Terminal Continuity M49 21 M142 4 Yes Connector Terminal — Continuity M49 21 Ground No WJIA1089E |