2004 INFINITI QX56 Factory Service Manual

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Page 497 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-92 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 1. CHECK REAR BLOWER MOTOR OPERATION Blower motor rotates normally when rear fan switch (front) is set at 1 - 4 speed. OK or NG OK >> GO TO 2. N

Page 498 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-93 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed) SYMPTOM: Rear blower motor does not rotate when rea

Page 499 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-94 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 1. DIAGNOSTIC PROCEDURE Blower motor rotates normally at each speed. OK or NG OK >> Inspection End. NG >> 1. Does not rotate at any speed, GO TO

Page 500 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-95 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 6. CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect fuse bl

Page 501 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-96 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 10. CHECK REAR BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect fuse block (J/B) connector M3 an

Page 502 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-97 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 15. CHECK REAR BLOWER MOTOR GROUND CIRCUIT TO REAR BLOWER MOTOR RESISTOR 1. Turn ignition switch OFF. 2. Disconnect

Page 503 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-98 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 18. CHECK REAR FAN SWITCH (FRONT) Refer to ATC-99, " Rear Fan Switch (Front)" . OK or NG OK >> GO TO 19. NG >> Replace rear fan switch (front).

Page 504 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-99 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 COMPONENT INSPECTION Rear Blower Motor Relay Check circuit continuity between terminals by supplying 12 volts and gr
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