2005 INFINITI QX4 turn signal

SE-80
AUTOMATIC DRIVE POSITIONER
Revision: October 20052005 QX56
2. CHECK SEAT MEMORY SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect seat memory switch.
3. Check voltage between seat memory switch connector D5 ter-
minal 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK SEAT MEMORY INDICATOR CIRCUIT HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit.
3. Check continuity between automatic drive positioner control unit
connector M33 terminals 12, 13 and seat memory switch con-
nector D5 terminals 6, 7.
4. Check continuity between automatic drive positioner control unit
connector M33 terminals 12, 13 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK SEAT MEMORY SWITCH INDICATOR SIGNAL
1. Connect seat memory switch.
2. Turn ignition switch ON.
3. Check voltage between automatic drive positioner control unit
connector M33 terminals 12, 13 and ground.
OK or NG
OK >> Replace automatic drive positioner control unit.
NG >> Replace seat memory switch.5 (Y/R) - Ground : Battery voltage
PIIA4595E
12 (P) - 6 (P) : Continuity should exist.
13 (Y/G) - 7 (Y/G) : Continuity should exist.
12 (P) - Ground : Continuity should not exist.
13 (Y/G) - Ground : Continuity should not exist.
LIIA1022E
12 (P) - Ground : Battery voltage
13 (Y/G) - Ground : Battery voltage
LIIA1134E

SE-82
AUTOMATIC DRIVE POSITIONER
Revision: October 20052005 QX56
A/T Device (Detent Switch) Circuit InspectionEIS004YJ
1. CHECK FUNCTION
With CONSULT-II
Check that when the A/T shift lever is in P position, “DETENT SW”
on the DATA MONITOR becomes OFF.
Without CONSULT-II
GO TO 2.
OK or NG
OK >> A/T device (detent switch) circuit is OK.
NG >> GO TO 2.
2. CHECK A/T DEVICE (DETENT SWITCH) HARNESS
1. Turn ignition switch OFF.
2. Disconnect A/T device and driver seat control unit.
3. Check continuity between A/T device connector M203 terminal 6
and driver seat control unit connector P2 terminal 21.
4. Check continuity between A/T device connector M203 terminal 6
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DETENT SWITCH
Check continuity between A/T device (detent switch) as follows.
OK or NG
OK >> A/T device is OK.
NG >> Replace A/T device.
Monitor item
[OPERATION or UNIT]Contents
DETENT SW“ON/
OFF”The selector lever position “P position (OFF)/other than P
position (ON)” judged from the park switch signal is dis-
played.
PIIA0291E
6 (L/R) - 21 (L/R) : Continuity should exist.
6 (L/R) - Ground : Continuity should not exist.
LIIA1024E
ConnectorTe r m i n a l s
Condition Continuity
(+) (–)
M203 5 6P position No
Other than
P positionYe s
LIIA1491E

AUTOMATIC DRIVE POSITIONER
SE-83
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SE
Revision: October 20052005 QX56
Steering Wheel Tilt Switch Circuit InspectionEIS004YK
1. CHECK FUNCTION
With CONSULT-II
With “TILT SW-UP, TILT SW-DOWN” on the DATA MONITOR, oper-
ate the ADP steering wheel tilt switch to check ON/OFF operation.
Without CONSULT-II
1. Turn ignition switch OFF.
2. Check voltage between automatic drive positioner control unit
connector and ground.
OK or NG
OK >> ADP steering wheel tilt switch circuit is OK.
NG >> GO TO 2.
2. CHECK ADP STEERING WHEEL TILT SWITCH HARNESS CONTINUITY
1. Disconnect automatic drive positioner control unit connector and ADP steering wheel tilt switch.
2. Check continuity between automatic drive positioner control unit
connector M33 terminals 1, 17 and ADP steering wheel tilt
switch connector M16 terminals 2, 3.
3. Check continuity between automatic drive positioner control unit
connector M33 terminals 1, 17 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
Monitor item [OPERATION or
UNIT]Contents
TILT SW-UP “ON/OFF”Operation (ON)/open (OFF) status
judged from the tilt switch (FR) signal is
displayed.
TILT SW-DOWN “ON/OFF”Operation (ON)/open (OFF) status
judged from the tilt switch (RR) signal is
displayed.
PIIA0315E
ConnectorTerminals
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
M331 (W/G)
GroundTilt switch ON (UP
operation)0
Other than above 5
17 (G/B)Tilt switch ON (DOWN
operation)0
Other than above 5
LIIA0491E
1 (W/G) - 2 (W/G) : Continuity should exist.
17 (G/B) - 3 (G/B) : Continuity should exist.
1 (W/G) - Ground : Continuity should not exist.
17 (G/B) - Ground : Continuity should not exist.
LIIA1434E

SE-86
AUTOMATIC DRIVE POSITIONER
Revision: October 20052005 QX56
UART Communication Line Circuit InspectionEIS004YM
1. CHECK UART LINE INPUT/OUTPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between driver seat control unit connector and
ground, with oscilloscope.
OK or NG
OK >> GO TO 2.
NG >> Check the following.

When voltage wave form does not appear with a constant voltage (approx. 5V), replace driver
seat control unit.

When voltage wave form does not appear with a constant voltage (approx. 0V), replace auto-
matic driver seat control unit.
2. CHECK UART LINE INPUT/OUTPUT SIGNAL 2
Check signal between automatic drive positioner control unit con-
nector ground, with oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Check the following.

When voltage wave form does not appear with a constant voltage (approx. 5V), replace auto-
matic drive positioner control unit.

When voltage wave form does not appear with a constant voltage (approx. 0V), replace driver
seat control unit.
ConnectorTe r m i n a l s
(Wire color)
Condition Signal
(+) (–)
P2 17 (W) GroundPedal
adjusting
switch ON
(FOR-
WAR D or
BACK-
WAR D
operation)
PIIA4599E
PIIA4814E
ConnectorTe r m i n a l s
(Wire color)
Condition Signal
(+) (–)
M33 10 (L) GroundPedal
adjusting
switch ON
(FOR-
WAR D or
BACK-
WAR D
operation)
PIIA4816E
PIIA4813E

SRS-48
SPIRAL CABLE
Revision: October 20052005 QX56
SPIRAL CABLEPFP:25554
Removal and InstallationEHS0016Y
REMOVAL
CAUTION:

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.

When servicing the SRS, do not work from directly in front of air bag module.
1. Set the front wheels in the straight-ahead position.
2. Remove driver air bag module. Refer to SRS-46, "
Removal and Installation" .
3. Remove the steering wheel center nut.
4. Remove the steering wheel using Tool.
5. Remove the column cover upper and lower.
WHIA0233E
1. Steering wheel 2. Lighting and turn signal switch 3. Wiper and washer switch
4. Spiral cable 5. Driver air bag module connector 6. Column cover upper
7. Column assembly 8. Column cover lower 9. Screw (Do not remove)
10. Screw
Tool number: A: J-1859A
B: J-42578
WHIA0124E

SPIRAL CABLE
SRS-49
C
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SRS
Revision: October 20052005 QX56
6. Remove wiper washer switch connector, then pinch the tabs at
wiper and washer switch base and slide switch away from steer-
ing column to remove.
7. While pressing tabs, pull lighting and turn signal switch toward
driver door and disconnect from base.
8. Remove the screws, release the clip, and remove the spiral
cable.
CAUTION:

Do not disassemble spiral cable.

Do not apply lubricant to the spiral cable.
9. Remove the spiral cable connectors.
CAUTION:
With the steering linkage disconnected, the spiral cable may snap by turning the steering wheel
beyond the limited number of turns. The spiral cable can be turned counterclockwise about 2.5
turns from the neutral position.
INSTALLATION
Installation is in the reverse order of removal.

Align spiral cable correctly when installing steering wheel. Make
sure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.6 revolutions from the right
end position and ending with the knob at the top.

If equipped with VDC, refer to BRC-62, "Adjustment of Steering
Angle Sensor Neutral Position" for steering angle sensor adjust-
ment.

After the work is completed, perform self-diagnosis to make sure
no malfunction is detected. Refer to SRS-20, "
SRS Operation
Check" .
LHIA0034E
LHIA0035E
LHIA0036E
WGIA0038E

TF-2Revision: October 20052005 QX56 TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 54
DIAGNOSTIC PROCEDURE .............................. 55
COMPONENT INSPECTION .............................. 57
Transfer Control Unit .............................................. 57
DIAGNOSTIC PROCEDURE .............................. 57
Output Shaft Revolution Signal (TCM) ................... 58
DIAGNOSTIC PROCEDURE .............................. 58
Vehicle Speed Sensor (ABS) .................................. 58
DIAGNOSTIC PROCEDURE .............................. 58
Neutral-4LO Switch ................................................ 59
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 59
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 59
DIAGNOSTIC PROCEDURE .............................. 60
COMPONENT INSPECTION .............................. 62
4WD Shift Switch .................................................... 62
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 62
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 62
DIAGNOSTIC PROCEDURE .............................. 63
COMPONENT INSPECTION .............................. 66
Wait Detection Switch ............................................. 66
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 66
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 66
DIAGNOSTIC PROCEDURE .............................. 67
COMPONENT INSPECTION .............................. 69
PNP Switch Signal (TCM) ...................................... 69
DIAGNOSTIC PROCEDURE .............................. 69
Actuator Motor ........................................................ 70
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 70
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 70
DIAGNOSTIC PROCEDURE .............................. 71
COMPONENT INSPECTION .............................. 76
Actuator Position Switch ......................................... 77
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 77
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 77
DIAGNOSTIC PROCEDURE .............................. 78
COMPONENT INSPECTION .............................. 80
Transfer Control Device .......................................... 81
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 81
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE .......................................... 81
DIAGNOSTIC PROCEDURE .............................. 82
Engine Speed Signal (ECM) ................................... 85
DIAGNOSTIC PROCEDURE .............................. 85
Clutch Pressure Solenoid ....................................... 86
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 86
TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE ..........................................86
DIAGNOSTIC PROCEDURE ...............................87
COMPONENT INSPECTION ...............................90
2-4WD Solenoid ......................................................91
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................91
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ..........................................91
DIAGNOSTIC PROCEDURE ...............................91
COMPONENT INSPECTION ...............................94
Transfer Motor .........................................................95
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................95
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ..........................................96
DIAGNOSTIC PROCEDURE ...............................97
COMPONENT INSPECTION ............................. 102
Transfer Fluid Temperature ................................... 102
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE .............................................. 102
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ........................................ 102
DIAGNOSTIC PROCEDURE ............................. 103
COMPONENT INSPECTION ............................. 104
Clutch Pressure Switch ......................................... 105
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE .............................................. 105
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ........................................ 105
DIAGNOSTIC PROCEDURE ............................. 106
COMPONENT INSPECTION ............................. 107
Line Pressure Switch ............................................ 108
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE .............................................. 108
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ........................................ 108
DIAGNOSTIC PROCEDURE ............................. 109
COMPONENT INSPECTION .............................110
Throttle Position Signal (ECM) .............................. 111
DIAGNOSTIC PROCEDURE ............................. 111
ABS Operation Signal (ABS) ................................ 111
DIAGNOSTIC PROCEDURE ............................. 111
VDC Operation Signal (ABS) ................................112
DIAGNOSTIC PROCEDURE .............................112
TCS Operation Signal (ABS) ................................112
DIAGNOSTIC PROCEDURE .............................112
CAN Communication Line .....................................113
DIAGNOSTIC PROCEDURE .............................113
ATP Switch ............................................................113
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ..............................................113
TRANSFER CONTROL UNIT TERMINALS AND
REFERENCE VALUE ........................................113
DIAGNOSTIC PROCEDURE .............................114
COMPONENT INSPECTION .............................115
TROUBLE DIAGNOSIS FOR SYMPTOMS ............117
4WD Shift Indicator Lamp and 4LO Indicator Lamp
Do Not Turn ON ....................................................117
SYMPTOM: ........................................................117

TF-18
ALL-MODE 4WD SYSTEM
Revision: October 20052005 QX56
LINE PRESSURE SWITCH

With the transfer system design, control of the oil pressure provides the transmission of drive torque to the
front wheels. The main pressure to control the oil pressure is referred to as the line pressure.

The line pressure switch determines whether or not adequate line pressure has built up under different
operating conditions.

The line pressure switch turns ON when line pressure is produced.

The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.
CLUTCH PRESSURE SWITCH

The clutch pressure switch determines whether or not adequate clutch pressure has built up under differ-
ent operating conditions.

The clutch pressure switch turns ON when clutch pressure is produced.

The clutch pressure switch senses clutch pressure abnormalities and turns the 4WD warning lamp ON.
TRANSFER FLUID TEMPERATURE SENSOR
The transfer temperature sensor detects the transfer fluid temperature and sends a signal to the transfer con-
trol unit.
TRANSFER CONTROL UNIT

Transfer control unit controls transfer control device by input signals of each sensor and each switch.

Self-diagnosis can be done.
TRANSFER CONTROL DEVICE
The transfer control device changes the state of transfer assembly between 2WD, AUTO, 4H⇔4LO with the
2WD, AUTO, 4H and 4LO signals of 4WD shift switch.
NOTE:

To shift between 4H⇔4LO, stop the vehicle, depress the brake pedal and shift the transmission selector
to the "N" position. Depress and turn the 4WD shift switch. The shift switch will not shift to the desired
mode if the transmission is not in "N" or the vehicle is moving. The 4LO indicator lamp will be lit when the
4LO is engaged.

Actuator motor and actuator position switch are integrated.
4WD SHIFT SWITCH AND INDICATOR LAMP
4WD Shift Switch
The 4WD shift switch allows selection from 2WD, AUTO, 4H or 4LO.
4WD Shift Indicator Lamp

Displays driving conditions selected by 4WD shift switch with 2WD, AUTO and 4H indicators while engine
is running. (When 4WD warning lamp is turned on, all 4WD shift indicator lamps are turned off.)

Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.
4LO Indicator Lamp

Displays 4LO condition while engine is running. 4LO indicator lamp flashes if transfer gear does not shift
completely under 2WD, AUTO, 4H⇔4LO. (When 4WD warning lamp is turned on, 4LO indicator lamp is
turned off.)

Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.