2005 INFINITI QX4 air condition

TROUBLE DIAGNOSIS FOR SYMPTOMS
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5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> Inspection End.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
4WD Warning Lamp Flashes SlowlyEDS002HS
SYMPTOM:
While driving, 4WD warning lamp flashes slowly. (When continuing to flash until turning ignition
switch OFF.)
NOTE:
Slow flashing: 1 time/2 seconds
DIAGNOSTIC PROCEDURE
1. CHECK TIRE
Check the following.

Tire pressure

Wear condition

Longitudinal tire size (There is no difference between longitudinal tires.)
OK or NG
OK >> GO TO 2.
NG >> Repair or replace damaged parts.
2. CHECK TRANSFER FLUID TEMPERATURE
Perform trouble diagnosis for transfer fluid temperature system. Refer to TF-102, "
Transfer Fluid Temperature"
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK CLUTCH PRESSURE SWITCH
Perform trouble diagnosis for clutch pressure switch system. Refer to TF-105, "
Clutch Pressure Switch" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 5.
5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> Inspection End.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.

TF-130
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
Heavy Tight-corner Braking Symptom OccursEDS002HT
SYMPTOM:
Heavy tight-corner braking symptom occurs when vehicle is driven in AUTO mode and steering wheel
is turned fully to either side.
DIAGNOSTIC PROCEDURE
NOTE:

Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not
a malfunction.

Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift
switch is "4H" or "4LO", steering wheel is turned fully to either side.
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-50, "
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)" .
Is "CAN COMM CIRCUIT [U1000]" displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-113, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to TF-62, "
4WD Shift Switch" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self diagnosis for ECM. Refer to EC-49, "
Emission-related Diagnostic Information" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4. CHECK SYSTEM FOR CLUTCH PRESSURE SOLENOID
Perform trouble diagnosis for clutch pressure solenoid system. Refer to TF-105, "
Clutch Pressure Switch" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 6.
6. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 7.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.

LOW TIRE PRESSURE WARNING SYSTEM
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BCM (BODY CONTROL MODULE)
Reads the air pressure signal received by the remote keyless entry
receiver, and controls the warning lamp and the buzzer operations
as shown below. It also has a judgement function to detect a system
malfunction.
WARNING LAMP AND BUZZER
Indicates low tire pressure or system malfunction.
DISPLAY UNIT
Displays the air pressure of each tire.

After the ignition switch is turned on, the pressure values will not
be displayed until the data of each wheel is received.
LEIA0068E
Condition Warning lamp Buzzer
Less than 193 kPa (2.0 kg/cm
2 , 28 psi)
[Flat tire]ONSounds for 10
seconds
System malfunctionAfter key ON,
flashes once per
secondOFF
System normalON for 1 second
after ignition ONOFF
LEIA0055E
WEIA0082E

TROUBLE DIAGNOSES
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Data Monitor Mode
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or the actual malfunction location may be different from that displayed on
CONSULT-II.MONITOR CONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

Drive vehicle for a few minutes.
Tire pressure (kPa or psi) or

Ignition switch ON and activation tool
is transmitting activation signals.
ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1
Ignition switch ONRegistration ID: DONE
No registration ID: YET
WARN ING LAM PLow tire pressure warning lamp on: ON
Low tire pressure warning lamp off: OFF
BUZZERBuzzer in combination meter on: ON
Buzzer in combination meter off : OFF

FRONT WIPER AND WASHER SYSTEM
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Terminals and Reference Values for IPDM E/R EKS00BDY
Work FlowEKS00BDZ
1. Confirm the trouble symptom or customer complaint.
2. Understand the system description, refer to WW-4, "
System Description" .
3. Perform preliminary inspection, refer to WW-15, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does wiper function operate normally? If it operates normally, GO TO 6. If not, GO TO 4.
6. Inspection End.
Preliminary InspectionEKS00BE0
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
35 O/B Combination switch output 2
ON

Light switch and wiper switch OFF

Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery
39 L CAN-H ON — —
40 P CAN-L ON — —
67 B Ground — — 0
70 W/B Battery power OFF — Battery Te r m i -
nal No.Wire
colorSignal nameMeasuring condition
Reference Value (V)
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value (V)
(Approx.) Ignition
switchOperation or condition
32 L Low speed signal ON Wiper switchOFF 0
LO Battery
35 L/B High speed signal ON Wiper switchOFF 0
HI Battery
38 B Ground — — 0
39 L CAN-H ON — —
40 P CAN-L ON — —
43 L/Y Wiper auto stop signal ONWiper operating Battery
Wiper stopped 0
59 B Ground — — 0
Unit Power source Fuse No.
Front and rear washer motor Ignition switch ON or START 9
Front wiper relay Battery 39
BCMIgnition switch ON or START 59
Battery f

WW-16
FRONT WIPER AND WASHER SYSTEM
Revision: October 20052005 QX56
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between BCM and fuse.
3. GROUND CIRCUIT INSPECTION (BCM)
Check for continuity between BCM terminal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair/replace BCM ground circuit.
Terminals Ignition switch position
(+)
(–) OFF ON
ConnectorTe r m i n a l
(Wire color)
M18 38 (W/L)
Ground0V
Battery voltage
M20 70 (W/B) Battery voltage
WKIA2089E
Terminals
Ignition switch
conditionContinuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground OFF Yes
WKIA2090E

WW-30
FRONT WIPER AND WASHER SYSTEM
Revision: October 20052005 QX56
2. IPDM E/R TO FRONT WIPER MOTOR (2) INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front wiper motor connector.
3. Check continuity between IPDM E/R harness connector terminal
and front wiper motor harness connector terminal.
4. Check continuity between IPDM E/R harness connector terminal
and ground.
OK or NG
OK >> Connect connectors. GO TO 3.
NG >> Repair harness or connector.
3. IPDM E/R TO FRONT WIPER MOTOR (3) INSPECTION
While front wiper motor is stopped and while operating, measure
voltage between IPDM E/R terminal 43 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Replace front wiper motor. Refer to WW-31, "
Removal and Installation of Wiper Motor and Link-
age" .
Terminals
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) E23 6 (L/Y) Yes
WKIA2084E
Te r m i n a l s
Continuity
Connector Terminal (wire color)
E122 43 (L/Y) Ground No
WKIA2088E
Te r m i n a l s
Voltag e
(Approx.) (+)
(–) Condition
ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) GroundWiper operatingBattery
voltage
Wiper stopped 0
WKIA2085E

REAR WIPER AND WASHER SYSTEM
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How to Proceed With Trouble DiagnosisEKS00BEF
1. Confirm the symptoms and customer complaint.
2. Understand operation description and function description. Refer to WW-35, "
System Description" .
3. Perform the Preliminary Check. Refer to WW-43, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the rear wiper operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary InspectionEKS00BEG
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
55 SB Rear wiper output circuit 1 ONRise up position (rear wiper arm on
stopper)0V (except battery voltage at ini-
tial rear wiper ON to lift arm off
stop)
A Position (full clockwise stop
position)Battery voltage
Forward sweep (counterclockwise
direction)Battery voltage
B Position (full counterclockwise stop
position)0V
Reverse sweep (clockwise direction) 0V
67 B Ground ON — 0V
70 W/B Battery power OFF — Battery voltage Te r m i -
nal No.Wire
colorSignal nameMeasuring condition
Reference Value (V)
(Approx.) Ignition
switchOperation or condition
Unit Power source Fuse No.
Front and rear washer motor Ignition ON or START 9
BCMIgnition ON or START 59
Battery f