2007 INFINITI QX56 turn signal

TROUBLE DIAGNOSIS FOR SYSTEM
TF-101
< SERVICE INFORMATION >
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4.CHECK ATP SWITCH
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect ATP switch harness connector.
3. Remove ATP switch. Refer to TF-22, "
Location of Electrical Parts".
4. Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.
OK or NG
OK >> GO TO 5.
NG >> Replace ATP switch. Refer to TF-22, "
Location of Elec-
trical Parts".
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
OK or NG
OK >> GO TO 6.
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.
6.CHECK ATP WARNING LAMP
1. Turn ignition switch “ON”. (Do not start engine.)
2. Move A/T selector lever to "P" position.
3. Set 4WD shift switch from "4H" to "4LO" or "4LO" to "4H".
Does ATP warning lamp turn ON while switching?
YES >> GO TO TF-109, "ATP Warning Lamp Turns ON" .
NO >> Inspection End.
COMPONENT INSPECTION
1. Turn ignition switch “OFF”. (Stay for at least 5 second.)
2. Disconnect ATP switch harness connector.
3. Remove ATP switch. Refer to TF-22, "
Location of Electrical Parts".
4. Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.
5. If NG, replace the ATP switch. Refer to TF-22, "
Location of Elec-
trical Parts".
Terminal Condition Continuity
8 - 9Push ATP switch Yes
Release ATP switch No
SDIA2757E
Terminal Condition Continuity
8 - 9Push ATP switch Yes
Release ATP switch No
SDIA2757E

TF-104
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
3. Check continuity between the following terminals.
- Transfer control unit harness connector E142 terminal 2 and
combination meter harness connector M24 terminal 32.
- Transfer control unit harness connector E142 terminal 11 and
combination meter harness connector M24 terminal 31.
- Transfer control unit harness connector E142 terminal 12 and
combination meter harness connector M24 terminal 33.
- Transfer control unit harness connector E142 terminal 21 and
combination meter harness connector M24 terminal 30.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK INDICATOR LAMP CIRCUIT
1. Connect combination meter harness connector.
2. Disconnect transfer control unit harness connector.
3. Turn ignition switch “ON”.
4. Ground the following terminals using suitable wiring.
- Transfer control unit harness connector E142 terminal 2 and
ground.
- Transfer control unit harness connector E142 terminal 11 and
ground.
- Transfer control unit harness connector E142 terminal 12 and
ground.
- Transfer control unit harness connector E142 terminal 21 and
ground.
Do indicator lamps turn on?
OK >> GO TO 6.
NG >> Replace combination meter. Refer to DI-21, "
Removal
and Installation of Combination Meter".
6.SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 7.
7.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
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 Does Not Turn ONINFOID:0000000003532554
SYMPTOM:
Continuity should exist.
WDIA0160E
SDIA2772E

TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-107
< SERVICE INFORMATION >
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5.CHECK INDICATOR LAMP CIRCUIT
1. Connect combination meter harness connector.
2. Disconnect transfer control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Ground the following terminal using suitable wiring.
- Transfer control unit harness connector E142 terminal 5 and
ground.
Does 4WD warning lamp turn on?
OK >> GO TO 6.
NG >> Replace combination meter. Refer to DI-21, "
Removal
and Installation of Combination Meter".
6.SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 7.
7.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value" .
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 Shift Indicator Lamp or 4LO Indicator Lamp Does Not ChangeINFOID:0000000003532555
SYMPTOM:
4WD shift indicator lamp or 4LO indicator lamp does not change when switching 4WD shift switch.
DIAGNOSTIC PROCEDURE
1.CONFIRM THE SYMPTOM
Confirm 4WD shift indicator lamp and 4LO indicator lamp turn on when ignition switch is turned to ON.
Do 4WD shift indicator lamp and 4LO indicator lamp turn on?
YES >> GO TO 2.
NO >> Go to "4WD Shift Indicator Lamp or 4LO Indicator Lamp Does Not Change".
2.CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to TF-57, "
4WD Shift Switch".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK SYSTEM FOR WAIT DETECTION SWITCH
Perform trouble diagnosis for wait detection switch system. Refer to TF-60, "
Wait Detection Switch".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SYSTEM FOR NEUTRAL-4LO SWITCH
Perform trouble diagnosis for neutral-4LO switch system. Refer to TF-54, "
Neutral-4LO Switch".
SDIA2774E

TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-109
< SERVICE INFORMATION >
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ATP Warning Lamp Turns ONINFOID:0000000003532556
SYMPTOM:
ATP warning lamp turns ON when 4WD shift switch from “4H” to “4LO” or “4LO” to “4H” with A/T
selector lever “N” to “P” position.
DIAGNOSTIC PROCEDURE
1.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-48, "
Self-Diagnosis Procedure".
Do the self-diagnostic results indicate CAN communication?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-99, "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-57, "
4WD Shift Switch".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK SYSTEM FOR PNP SWITCH SIGNAL
Perform trouble diagnosis for PNP switch signal system. Refer to TF-63, "
PNP Switch Signal (TCM)".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SYSTEM FOR ATP SWITCH
Perform trouble diagnosis for ATP switch system. Refer to TF-99, "
ATP Switch".
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and combination meter harness connector.
3. Check continuity between the following terminals.
- Transfer control unit harness connector E142 terminal 15 and
combination meter harness connector M24 terminal 6.
Continuity should exist.
WDIA0149E

TF-110
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
- Transfer control unit harness connector E142 terminal 40 and
combination meter harness connector M24 terminal 7.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK ATP WARNING LAMP CIRCUIT
1. A/T selector lever in "P" position.
2. Connect combination meter harness connector and transfer control unit harness connector.
3. Disconnect ATP switch harness connector.
4. Ground the following terminal using suitable wiring.
- ATP switch harness connector F55 terminal 8 and ground.
5. Turn ignition switch “ON”. (Do not start engine.)
Does indicator lamp turn on?
OK >> GO TO 7.
NG >> Replace combination meter. Refer to DI-21, "
Removal
and Installation of Combination Meter".
7.SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 8.
8.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
OK or NG
OK >> GO TO 9.
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.
9.CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to TF-128, "
Disassembly and Assembly".
2. Check transfer inner parts.
OK or NG
OK >> Inspection End.
NG >> Repair or replace damaged parts.
4LO Indicator Lamp Repeats FlashingINFOID:0000000003532557
SYMPTOM:
4LO lamp keeps flashing.
DIAGNOSTIC PROCEDURE
1.CONFIRM THE SYMPTOM
1. Set 4WD shift switch to “2WD”.
2. Move vehicle forward and backward, or drive straight increasing or decreasing under 20 km/h (12 MPH). 40 to 7: Continuity should not exist.
7 to 40: Continuity should exist.
WDIA0150E
SDIA2769E

TF-112
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
YES >> Inspection End.
NO >> GO TO 3.
3.CHECK TRANSFER FLUID TEMPERATURE
Perform trouble diagnosis for transfer fluid temperature system. Refer to TF-90, "
Transfer Fluid Temperature".
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-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
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 SlowlyINFOID:0000000003532559
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-90, "
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-92, "
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.

TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-113
< SERVICE INFORMATION >
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NG >> GO TO 5.
5.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
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.
Heavy Tight-corner Braking Symptom OccursINFOID:0000000003532560
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-48, "
Self-Diagnosis Procedure".
Is "CAN COMM CIRCUIT [U1000]" displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-99, "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-57, "
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 E C - 111 , "
CONSULT-II Function (ENGINE)".
Is any malfunction deteced 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 toTF-92, "
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-35, "
Transfer Control Unit Input/Output Signal Ref-
erence Value".
OK or NG

WT-1
SUSPENSION
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SECTION WT
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ROAD WHEELS & TIRES
SERVICE INFORMATION ............................2
PRECAUTIONS ...................................................2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
2
PREPARATION ...................................................3
Special Service Tool .................................................3
Commercial Service Tool ..........................................3
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING .............................
4
NVH Troubleshooting Chart ......................................4
WHEEL ................................................................5
Inspection ..................................................................5
WHEEL AND TIRE ASSEMBLY .........................6
Balancing Wheels .....................................................6
Rotation .....................................................................7
LOW TIRE PRESSURE WARNING SYSTEM .....8
System Component ...................................................8
System Description ...................................................8
CAN COMMUNICATION ....................................10
System Description .................................................10
TROUBLE DIAGNOSIS .....................................11
Wiring Diagram- T/WARN - .....................................11
Terminal and Reference Value (BCM) ....................12
ID Registration Procedure .......................................12
Transmitter Wake Up Operation .............................14
CONSULT-II Function (BCM) ..................................15
Self-Diagnosis .........................................................15
How to Perform Trouble Diagnosis for Quick and
Accurate Repair .......................................................
17
Preliminary Check ...................................................18
Flash Code/Symptom Chart ....................................18
TROUBLE DIAGNOSIS FOR SELF-DIAG-
NOSTIC ITEMS .................................................
20
Data from Transmitter Not Being Received .............20
Transmitter Malfunction ...........................................20
Transmitter Pressure Malfunction ............................21
Vehicle Speed Signal ..............................................21
Ignition Signal ..........................................................22
TROUBLE DIAGNOSIS FOR SYMPTOMS ......23
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On ...................
23
Low Tire Pressure Warning Lamp Stays On When
Ignition Switch Is Turned On ...................................
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Low Tire Pressure Warning Lamp Flashes When
Ignition Switch Is Turned On ...................................
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Hazard Warning Lamps Flash When Ignition
Switch Is Turned On ................................................
25
"TIRE PRESSURE" Information in Display Unit
Does Not Exist .........................................................
25
ID Registration Cannot Be Completed ....................25
REMOVAL AND INSTALLATION .....................26
Transmitter (Pressure Sensor) ................................26
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
28
Road Wheel .............................................................28
Tire ..........................................................................28