2010 INFINITI QX56 Factory Service Manual

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Page 1193 of 4210

INFINITI QX56 2010 Factory Service Manual 4WD SHIFT INDICATOR LAMP KEEPS FLASHINGDLN-111
< SYMPTOM DIAGNOSIS > [ATX14B]
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4WD SHIFT INDICATOR LAMP KEEPS FLASHING
DescriptionINFOID:0000000005148865
The 4WD shift

Page 1194 of 4210

INFINITI QX56 2010 Factory Service Manual DLN-112
< SYMPTOM DIAGNOSIS >[ATX14B]
4WD WARNING LAMP FLASHES RAPIDLY
4WD WARNING LAMP FLASHES RAPIDLY
DescriptionINFOID:0000000005148867
The 4WD warning lamp flashes quickly while driving (2 times /

Page 1195 of 4210

INFINITI QX56 2010 Factory Service Manual 4WD WARNING LAMP FLASHES SLOWLYDLN-113
< SYMPTOM DIAGNOSIS > [ATX14B]
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4WD WARNING LAMP FLASHES SLOWLY
DescriptionINFOID:0000000005148869
The 4WD warning lamp flashes s

Page 1196 of 4210

INFINITI QX56 2010 Factory Service Manual DLN-114
< SYMPTOM DIAGNOSIS >[ATX14B]
HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS
HEAVY TIGHT-CORNER BR
AKING SYMPTOM OCCURS
DescriptionINFOID:0000000005148871
This symptom occurs when the vehicle is ac

DLN-114
< SYMPTOM DIAGNOSIS >[ATX14B]
HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS
HEAVY TIGHT-CORNER BR
AKING SYMPTOM OCCURS
DescriptionINFOID:0000000005148871
This symptom occurs when the vehicle is accelerati ng in 4WD and the steering wheel is turned fully either
direction. It may feel like a bump or being pushed fr om behind. A small amount of this bumping feeling is
acceptable under certain road conditions. The transfer case may be adjusted using the CONSULT-III to com-
pensate for this condition.
Diagnosis ProcedureINFOID:0000000005148872
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 DLN-18, "
CONSULT-III Function (ALL MODE AWD/4WD)".
Is CAN COMM CIRCUIT [U1000] displayed?
YES >> Perform trouble diagnosis for CAN communication line.
NO >> GO TO 2.
2.CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to DLN-32, "
Diagnosis Procedure".
Are the inspection results normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self diagnosis for ECM. Refer to EC-63, "
CONSULT-III Function (ENGINE)".
Is any malfunction deteced by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4.CHECK SYSTEM FOR CLUT CH PRESSURE SOLENOID
Perform trouble diagnosis for clutch pressure solenoid system. Refer to DLN-71, "
Diagnosis Procedure".
Are the inspection results normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.SYMPTOM CHECK
Check again.
Are the inspection results normal?
YES >> Inspection End.
NO >> GO TO 6.
6.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-81, "
Reference Value".
Are the inspection results normal?
YES >> GO TO 7.
NO >> Check transfer control unit pin terminals fo r damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
7.CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to DLN-142, "
Disassembly and Assembly".
2. Check transfer inner parts.
Revision: April 20092010 QX56

Page 1197 of 4210

INFINITI QX56 2010 Factory Service Manual HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURSDLN-115
< SYMPTOM DIAGNOSIS > [ATX14B]
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Are the inspection results normal?
YES >> Inspection End.
NO >> Repair or replace damag

Page 1198 of 4210

INFINITI QX56 2010 Factory Service Manual DLN-116
< SYMPTOM DIAGNOSIS >[ATX14B]
ATP SWITCH
ATP SWITCH
DescriptionINFOID:0000000005148873
The ATP indicator is ON when the transfer case is not in neutral.
Diagnosis ProcedureINFOID:0000000005148

Page 1199 of 4210

INFINITI QX56 2010 Factory Service Manual ATP SWITCHDLN-117
< SYMPTOM DIAGNOSIS > [ATX14B]
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3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect ATP switch harness co

Page 1200 of 4210

INFINITI QX56 2010 Factory Service Manual DLN-118
< SYMPTOM DIAGNOSIS >[ATX14B]
4WD SYSTEM DOES NOT OPERATE
4WD SYSTEM DOES NOT OPERATE
DescriptionINFOID:0000000005148875
The vehicle can not be put into 4WD mode. (Possible hydraulic malfunct

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