2004 INFINITI QX56 Factory Service Manual

Page 481 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-76
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Intake Door Motor CircuitEJS002CG
SYMPTOM:
Intake door does not change.
Intake door motor does not operate normally.
INSPECTION FLOW
*1ATC-56,

Page 482 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-77
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
Front air control
Intake door motor

Page 483 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-78
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
COMPONENT DESCRIPTION
Intake door motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by

Page 484 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-79
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
Defroster Door Motor CircuitEJS002CH
SYMPTOM:
Defroster door does not change.
Defroster door motor does not operat

Page 485 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-80
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
SYSTEM DESCRIPTION
Component Parts
Defroster door control system components are:
Front air control
Defroster door motor
PBR (Built into defro

Page 486 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-81
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
DIAGNOSTIC PROCEDURE FOR DEFROSTER DOOR MOTOR
1. CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS
Self-diagnosis c

Page 487 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-82
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
5. CHECK PBR GROUND REFERENCE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air control connector M49.
3. Check continuity between de

Page 488 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-83
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
Front Blower Motor CircuitEJS002CI
SYMPTOM:
Blower motor operation is malfunctioning.
INSPECTION FLOW
*1 .AT C - 5