2005 INFINITI QX4 Factory Service Manual

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Page 489 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-94 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 SYSTEM DESCRIPTION Component Parts Blower speed control system components are: Front air control Front blower motor In-vehicle sensor Ambie

Page 490 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-95 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 Blower Speed Compensation - Sunload When the in-vehicle temperature and the set temperature are very close, the blo

Page 491 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-96 TROUBLE DIAGNOSIS Revision: October 20052005 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 L

Page 492 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-97 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 5. CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN Check continuity between front blower motor relay

Page 493 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-98 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 9. CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Check continuity between front blower motor relay

Page 494 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-99 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 14. CHECK BLOWER MOTOR GROUND CIRCUIT Check continuity between front blower motor harness connector M62 terminal 1

Page 495 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-100 TROUBLE DIAGNOSIS Revision: October 20052005 QX56 COMPONENT INSPECTION Front Blower Motor Relay Check continuity between terminals by supplying 12 volts and ground to coil side terminals of re

Page 496 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS ATC-101 C D E F G H I K L MA B AT C Revision: October 20052005 QX56 Rear Blower Motor CircuitEJS003XT SYMPTOM: Blower motor operation is malfunctioning. INSPECTION FLOW *1AT C - 6 0
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