2001 INFINITI QX4 Factory Service Manual

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Page 1897 of 2395

INFINITI QX4 2001 Factory Service Manual Blower Speed CompensationNBHA0062S05SunloadNBHA0062S0501When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low speed. The low speed will vary depen

Page 1898 of 2395

INFINITI QX4 2001 Factory Service Manual 1 CHECK POWER SUPPLY FOR FAN CONTROL AMP. Disconnect fan control amp. harness connector. Do approx. 12 volts exist between fan control amp. harness terminal No. 3 and body ground? RHA480G YesorNo Ye s

Page 1899 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK VOLTAGE FOR FAN CONTROL AMP. Set up Self-diagnosis STEP 4. Measure voltage across fan control amp. harness terminal No. 2 and body ground. RHA481GB MTBL0465 OK or NG OK©GO TO 5. NG©IThe resu

Page 1900 of 2395

INFINITI QX4 2001 Factory Service Manual 6 CHECK FAN FEED BACK CIRCUIT Reconnect auto amp. (LCU) harness connector. Do approx. 12 volts exist between auto amp. (LCU) harness terminal No. 33 and body ground? RHA825H YesorNo Ye s©GO TO 7. No

Page 1901 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK POWER SUPPLY FOR BLOWER MOTOR Disconnect blower motor harness connector. Do approx. 12 volts exist between blower motor harness terminal No. 1 and body ground? RHA091G YesorNo Ye s©GO TO 9. N

Page 1902 of 2395

INFINITI QX4 2001 Factory Service Manual 10 CHECK BLOWER MOTOR CIRCUIT BETWEEN BLOWER MOTOR AND AUTO AMP. (LCU) Check circuit continuity between blower motor harness terminal No. 2 and auto amp. (LCU) harness terminal No. 34. RHA827H Continu

Page 1903 of 2395

INFINITI QX4 2001 Factory Service Manual Magnet Clutch TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH=NBHA0095SYMPTOM: IMagnet clutch does not engage. Inspection FlowNBHA0095S01Without Navigation SystemNBHA0095S0101 SHA249F *1: STEP-BY-STEP P

Page 1904 of 2395

INFINITI QX4 2001 Factory Service Manual With Navigation SystemNBHA0095S0102 RHA876H *1: STEP-BY-STEP PROCEDURE (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-106 *8: HA-150 *9: HA-1
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