2004 INFINITI QX56 Factory Service Manual

Page 505 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-100
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Rear Blower Motor
Check that there are no foreign particles inside the intake unit.
Apply 12 volts to terminal 2 and ground to terminal 1 and e

Page 506 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-101
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
Rear Air Control CircuitEJS002CK
SYMPTOM:
Temperature cannot be adjusted from the rear air control.
INSPECTION FLO

Page 507 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-102
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
SYSTEM DESCRIPTION
Component Parts
Rear air control system components are:
Front air control
Rear air control
Air mix door motor (rear)
Rea

Page 508 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-103
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
2. CHECK CIRCUIT BETWEEN REAR AIR CONTROL AND FRONT AIR CONTROL FOR OPEN AND 
SHORT
1. Turn ignition switch OFF.
2.

Page 509 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-104
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Magnet Clutch CircuitEJS002CL
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
*1AT C - 5 6 ,  "Operational Check (Front)"*2ATC-53, "A/C

Page 510 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-105
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
SYSTEM DESCRIPTION
The front air control controls compressor operation based on ambient and intake temperature and

Page 511 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-106
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
2. PERFORM AUTO ACTIVE TEST
Refer to PG-23, "
Auto Active Test"  .
Does magnet clutch operate?
YES or NO
YES >>WITH CONSULT-II
GO TO 5.
WITHO

Page 512 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-107
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect BCM connec