2005 INFINITI QX4 Factory Service Manual

Page 3257 of 3419

INFINITI QX4 2005  Factory Service Manual TF-114
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
DIAGNOSTIC PROCEDURE
1. CHECK ATP SWITCH SIGNAL
 With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE

Page 3258 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEM
TF-115
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: October 20052005 QX56
3. CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect AT

Page 3259 of 3419

INFINITI QX4 2005  Factory Service Manual TF-116
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
4. Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.
5. If NG, replace the ATP switch.  Refer t

Page 3260 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-117
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: October 20052005 QX56
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
4WD Shift Indicator Lamp and 4LO Indicator Lamp Do Not Turn ONED

Page 3261 of 3419

INFINITI QX4 2005  Factory Service Manual TF-118
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
2. CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect tran

Page 3262 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-119
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: October 20052005 QX56
4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch “OFF”.

Page 3263 of 3419

INFINITI QX4 2005  Factory Service Manual TF-120
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
7. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Outp

Page 3264 of 3419

INFINITI QX4 2005  Factory Service Manual TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-121
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: October 20052005 QX56
4WD Warning Lamp Does Not Turn ONEDS002HN
SYMPTOM:
4WD warning lamp does not turn ON when turning igniti