2001 INFINITI QX4 Factory Service Manual

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Page 1889 of 2395

INFINITI QX4 2001 Factory Service Manual RHA593F COMPONENT DESCRIPTIONNBHA0057The intake door motor is attached to the intake unit. It rotates so that air is drawn from inlets set by the auto amplifier. Motor rota- tion is conveyed to a leve

Page 1890 of 2395

INFINITI QX4 2001 Factory Service Manual 2 CHECK FOR AUTO AMP. OUTPUT Set up Self-diagnosis STEP 4. Measure voltage across auto amp. harness terminals and body ground. RHA821H MTBL0466 OK or NG OK©INSPECTION END NG©GO TO 3. GI MA EM LC EC

Page 1891 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND INTAKE DOOR MOTOR Check circuit continuity between each terminal on auto amp. and on intake door motor. RHA822H MTBL0510 Continuity should exist. If OK

Page 1892 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK FOR AUTO AMP. OUTPUT Set up Self-diagnosis STEP 4. Measure voltage across auto amp. harness terminals and body ground. RHA823H MTBL0468 OK or NG OK©Replace intake door motor. NG©Replace auto

Page 1893 of 2395

INFINITI QX4 2001 Factory Service Manual RHA593F CONTROL LINKAGE ADJUSTMENT=NBHA0093Intake DoorNBHA0093S011. Install intake door motor on intake unit and connect it to main harness. 2. Set up code No. in Self-diagnosis STEP 4. Refer to HA-45

Page 1894 of 2395

INFINITI QX4 2001 Factory Service Manual Blower Motor TROUBLE DIAGNOSIS PROCEDURE FOR BLOWER MOTOR=NBHA0094SYMPTOM: IBlower motor operation is malfunctioning. IBlower motor operation is malfunctioning under out of starting fan speed control.

Page 1895 of 2395

INFINITI QX4 2001 Factory Service Manual With Navigation SystemNBHA0094S0102 RHA875H *1: HA-44 *2: HA-129 *3: HA-132 *4: HA-135 *5: HA-141*6: STEP-BY-STEP PROCEDURE (HA-45), see No. 13. *7: HA-98 *8: HA-98 *9: HA-45*10: HA-66 *11: HA-65 *12:

Page 1896 of 2395

INFINITI QX4 2001 Factory Service Manual SYSTEM DESCRIPTION=NBHA0062Component partsNBHA0062S01Fan speed control system components are: 1) Auto amp. 2) Fan control amp. 3) A/C LAN system (PBR built-in mode door motor and air mix door motor) 4
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