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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.
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TROUBLE DIAGNOSIS FOR SYMPTOMS
TF-131
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7. CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to TF-144, "
Disassembly and Assembly" .
2. Check transfer inner parts.
OK or NG
OK >> Inspection End.
NG >> Repair or replace damaged parts.
4WD System Does Not OperateEDS002HU
SYMPTOM:
The vehicle cannot be put into 4WD mode. (Hydraulic system failure)
DIAGNOSTIC PROCEDURE
1. 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 2.
NG >> Repair or replace damaged parts.
2. CHECK SYSTEM FOR CLUTCH PRESSURE SWITCH
Perform trouble diagnosis for clutch pressure switch system. Refer to TF-105, "
Clutch Pressure Switch" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. SYMPTOM CHECK
Check again.
OK or NG
OK >> Inspection End.
NG >> GO TO 4.
4. 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 5.
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.
5. CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to TF-144, "
Disassembly and Assembly" .
2. Check transfer inner parts.
OK or NG
OK >> Inspection End.
NG >> Repair or replace damaged parts.
Page 3275 of 3419

TF-132
TRANSFER CONTROL UNIT
Revision: October 20052005 QX56
TRANSFER CONTROL UNITPFP:33084
Removal and InstallationEDS002IS
REMOVAL
1. Set transfer state as 2WD when 4WD shift switch is at 2WD, or as AUTO when 4WD shift switch is at
AUTO.
CAUTION:
When removing transfer control unit, transfer state must be at 2WD or AUTO.
2. Turn the ignition switch OFF and disconnect negative battery terminal.
3. Remove the glove box assembly. Refer to IP-14, "
Instrument Lower Cover RH and Glove Box" .
4. Disconnect the two transfer control unit connectors.
5. Remove the transfer control unit bolts.
6. Remove the transfer control unit.
INSTALLATION
Installation is in the reverse order of removal.
When installing the transfer control unit, tighten bolts to the specified torque.
CAUTION:
Do not connect harness connector to transfer control unit when 4WD shift switch is at 4LO.
After the installation, check perform self-diagnosis. Refer to TF-50, "Self-diagnostic Procedure" . If NG,
adjust position between transfer assembly and transfer control unit. Refer to TF-4, "
Precautions for Trans-
fer Assembly and Transfer Control Unit Replacement" .
BDIA0014E
Transfer control unit bolts : 5.1 N·m (0.52 kg-m, 45 in-lb)
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FRONT OIL SEAL
TF-133
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Removal and InstallationEDS0 02 IT
REMOVAL
1. Partially drain the transfer fluid. Refer to MA-24, "DRAINING" .
2. Remove the front propeller shaft. Refer to PR-4, "
Removal and Installation" .
3. Remove the companion flange self-lock nut, using Tool.
4. Put a matching mark on top of the front drive shaft in line with
the mark on the companion flange.
CAUTION:
Use paint to make the matching mark on the front drive
shaft. Do not damage the front drive shaft.
5. Remove the companion flange, using suitable tool.
6. Remove the oil seal from the front case, using Tool.
CAUTION:
Do not damage front case.Tool number : KV40104000 ( — )
SDIA2657E
SDIA2658E
WDIA0193E
Tool number : ST33290001 (J-34286)
LDIA0144E
Page 3277 of 3419
TF-134
FRONT OIL SEAL
Revision: October 20052005 QX56
INSTALLATION
1. Install the oil seal until it is flush with the end face of the front
case, using Tool.
CAUTION:
Do not reuse oil seal.
Apply petroleum jelly to oil seal.
2. Align the matching mark of the front drive shaft with the match-
ing mark of the companion flange, then install the companion
flange.
3. Install the self-lock nut. Tighten to the specified torque, using
Tool. Refer to TF-144, "
COMPONENTS" .
CAUTION:
Do not reuse self-lock nut.
4. Install the front propeller shaft. Refer to PR-4, "
Removal and
Installation" .
5. Refill the transfer with fluid and check fluid level. Refer to MA-
25, "FILLING" .
6. Check the transfer for fluid leakage. Refer to MA-25, "
FLUID
LEAKAGE AND FLUID LEVEL" . Tool number : KV38100500 ( — )
SDIA2662E
SDIA2658E
Tool number : KV40104000 ( — )
LDIA0147E
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REAR OIL SEAL
TF-135
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Revision: October 20052005 QX56
REAR OIL SEALPFP:33140
Removal and InstallationEDS002IU
REMOVAL
1. Partially drain the transfer fluid. Refer to MA-24, "DRAINING" .
2. Remove the rear propeller shaft. Refer to PR-8, "
Removal and Installation" .
3. Remove the dust cover from the rear case.
CAUTION:
Do not damage the rear case.
4. Remove the rear oil seal from the rear case, using Tool.
CAUTION:
Do not damage the rear case.
INSTALLATION
1. Install the oil seal until it is flush with the end face of the rear
case, using Tool.
CAUTION:
Do not reuse oil seal.
Apply petroleum jelly to oil seal.
2. Apply petroleum jelly to the circumference of the new dust cover.
Position the dust cover using the identification mark as shown.
CAUTION:
Do not reuse dust cover.
Position the identification mark at the position shown.
WDIA0127E
Tool number : ST33290001 (J-34286)
LDIA0139E
Tool number : ST30720000 (J-25405)
LDIA0140E
SDIA2208E
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TF-136
REAR OIL SEAL
Revision: October 20052005 QX56
3. Install the dust cover to the rear case, using Tool.
CAUTION:
Do not reuse dust cover.
Apply petroleum jelly to dust cover.
4. Install the rear propeller shaft. Refer to PR-8, "
Removal and
Installation" .
5. Refill the transfer with fluid and check fluid level. Refer to MA-
25, "FILLING" .
6. Check the transfer for fluid leakage. Refer to MA-25, "
FLUID
LEAKAGE AND FLUID LEVEL" . Tool number : KV40105310 ( — )
PDIA0 116 E
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SIDE OIL SEAL
TF-137
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Revision: October 20052005 QX56
SIDE OIL SEALPFP:33142
Removal and InstallationEDS002IV
REMOVAL
1. Remove the front propeller shaft. Refer to PR-4, "Removal and Installation" .
2. Remove the companion flange. Refer to TF-133, "
Removal and Installation" .
3. Remove the transfer control device from the transfer assembly. Refer to TF-138, "
Removal and Installa-
tion" .
4. Remove the side oil seal.
CAUTION:
Do not damage shift cross.
INSTALLATION
1. Install the side oil seal until it is flush with the end face of case,
using Tool.
CAUTION:
Do not reuse oil seal.
Apply petroleum jelly to oil seal.
2. Install the transfer control device to the transfer assembly. Refer
to TF-138, "
Removal and Installation" .
3. Install the companion flange. Refer to TF-133, "
Removal and
Installation" .
4. Install the front propeller shaft. Refer to PR-4, "
Removal and Installation" .
SDIA2666E
Tool number : ST22360002 (J-25679-01)
SDIA2665E