2005 INFINITI QX4 Factory Service Manual

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Page 3217 of 3419

INFINITI QX4 2005 Factory Service Manual TF-74
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
5. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch “OFF”. (Stay for at least 5 secon

Page 3218 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: October 20052005 QX56
6. CHECK ACTUATOR MOTOR
1. Remove transfer control device. Refer to TF-138, "
Removal and Installation" .
2

Page 3219 of 3419

INFINITI QX4 2005 Factory Service Manual TF-76
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
COMPONENT INSPECTION
Transfer Shift Relay
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift

Page 3220 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: October 20052005 QX56
Actuator Position SwitchEDS002ID
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.

Page 3221 of 3419

INFINITI QX4 2005 Factory Service Manual TF-78
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
DIAGNOSTIC PROCEDURE
1. CHECK ACTUATOR POSITION SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for

Page 3222 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: October 20052005 QX56
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR POSITION SWITCH
1. Turn ignition switch “OFF�

TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: October 20052005 QX56
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR POSITION SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator position
switch) harness connector.
3. Check continuity between the following terminals.
–Transfer control unit harness connector E143 terminal 27 (W/L)
and transfer control device (actuator position switch) harness
connector F58 terminal 23 (W/L).
–Transfer control unit harness connector E143 terminal 44 (LG/B)
and transfer control device (actuator position switch) harness
connector F58 terminal 20 (LG/B).
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control device (actuator position switch) harness connector.
3. Check continuity between transfer control device (actuator posi-
tion switch) harness connector F58 terminal 22 (B) and ground.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
4. CHECK ACTUATOR POSITION SWITCH
1. Remove transfer control device. Refer to TF-138, "
Removal and Installation" .
2. Check operation by applying battery voltage to transfer control
device (actuator motor) terminals 21 and 24.
CAUTION:
Do not operate actuator motor for more than 1 second.
Change the actuator motor position to “HIGH” when
installing.
Be careful not to overheat the harness.
OK or NG
YES >> GO TO 5.
NO >> Replace transfer control device (actuator motor). Refer to TF-138, "
Removal and Installation" . Continuity should exist.
SDIA2716E
Continuity should exist.
SDIA2717E
Terminal Continuity Continuity
24 (Battery voltage) - 21
(Ground)20 - 22 Yes
22 - 23 No
21 (Battery voltage) - 24
(Ground)22 - 23 Yes
20 - 22 No
LDIA0101E

Page 3223 of 3419

INFINITI QX4 2005 Factory Service Manual TF-80
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output

Page 3224 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: October 20052005 QX56
Transfer Control DeviceEDS002IE
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
T

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