2004 INFINITI QX56 Factory Service Manual

Page 529 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-124
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
COMPONENT INSPECTION
Water Valve R elay
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
WJ

Page 530 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-125
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
Ambient Sensor CircuitEJS002CS
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor is attached on the radiator

Page 531 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-126
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
2. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL 
1. Turn ignition switch OFF.
2. Disconnect front air control connecto

Page 532 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-127
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
COMPONENT INSPECTION
Ambient Sensor
After disconnecting ambient sensor connector E1, measure resis-
tance between t

Page 533 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-128
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
In-vehicle Sensor CircuitEJS002CT
COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor is located on cluster lid D. It converts varia-

Page 534 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-129
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted. (30 or 31 is
indi

Page 535 of 3371

INFINITI QX56 2004  Factory Service Manual ATC-130
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
5. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connec

Page 536 of 3371

INFINITI QX56 2004  Factory Service Manual TROUBLE DIAGNOSIS
ATC-131
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor connector M32, measure resis-
tance be