2005 INFINITI QX4 ignition

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Page 486 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
ATC-91
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AT C
Revision: October 20052005 QX56
8. CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect the front air control

Page 487 of 3419

INFINITI QX4 2005  Factory Service Manual ATC-92
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
12. CHECK PBR FEEDBACK CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the defroster door motor harness connector and
front air con

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
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F
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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 498 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
ATC-103
C
D
E
F
G
H
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K
L
MA
B
AT C
Revision: October 20052005 QX56
3. CHECK REAR AIR CONTROL
Refer to ATC-102, "
Rear Blower Switch (Rear) Circuit" .
OK or NG
OK >> GO TO 4.
NG >> R

Page 500 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS
ATC-105
C
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G
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B
AT C
Revision: October 20052005 QX56
1. DIAGNOSTIC PROCEDURE
Blower motor rotates normally at each speed.
OK or NG
OK >> Inspection End.
NG >> 1. Does

Page 501 of 3419

INFINITI QX4 2005  Factory Service Manual ATC-106
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
6. CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector.
3. Tu