2004 INFINITI QX56 Factory Service Manual

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Page 489 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-84 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 SYSTEM DESCRIPTION Component Parts Blower speed control system components are: Front air control Front blower motor In-vehicle sensor Ambien

Page 490 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-85 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 Blower Speed Compensation - Sunload When the in-vehicle temperature and the set temperature are very close, the blow

Page 491 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-86 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 1. CHECK FUSES Check 20A fuses [No. 24 and 27 (located in the fuse and fusible link box)]. For fuse layout. Refer to PG-77, "FUSE AND FUSIBLE LI

Page 492 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-87 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 6. CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN 1. Disconnect variable blower control connector M122.

Page 493 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-88 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 10. REPLACE FUSES 1. Replace fuses. 2. Activate the front blower motor. 3. Do fuses blow? YES or NO YES >> GO TO 11. NO >> Inspection End. 11 .

Page 494 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-89 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 COMPONENT INSPECTION Front Blower Motor Relay Check continuity between terminals by supplying 12 volts and ground to

Page 495 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-90 TROUBLE DIAGNOSIS Revision: August 20072004 QX56 Rear Blower Motor CircuitEJS002CJ SYMPTOM: Blower motor operation is malfunctioning. INSPECTION FLOW *1AT C - 5 9 , "Operational Check (Rear)"

Page 496 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS ATC-91 C D E F G H I K L MA B AT C Revision: August 20072004 QX56 SYSTEM DESCRIPTION Component Parts Rear blower speed control system components are: Front air control Rear fan swi
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