check engine INFINITI QX56 2008 Factory Service Manual

TM-138
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to TM-187,
"Inspection and Judgment".
OK or NG
OK >> GO TO 6.
NG - 1 >> Line pressure high. GO TO 4.
NG - 2 >> Line pressure low. GO TO 5.
4.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
- Power train system. Refer to TM-232, "
Disassembly".
- Transmission case. Refer to TM-232, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
SAT638A
SAT494G
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-139
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
2. Check A/T fluid condition. Refer to TM-178, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 7.
NG >> GO TO 10.
7.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1".
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.
9.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
10.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
A/T Does Not Hold Lock-up ConditionINFOID:0000000001604192
SYMPTOM:
The lock-up condition cannot be main tained for more than 30 seconds.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-63, "Diagnosis Procedure", TM-51, "Diagnosis
Procedure", TM-46, "Diagnosis Procedure", TM-38, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-141
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-63, "Diagnosis Procedure", TM-51, "Diagnosis
Procedure", TM-46, "Diagnosis Procedure", TM-38, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1".
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
Engine Speed Does Not Return to IdleINFOID:0000000001604194
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Do the self-diagnostic results indicate front brake sol enoid valve, direct clutch solenoid valve, accelerator
pedal position sensor, output speed sensor and vehicle speed sensor signal?
YES >> Check the malfunctioning system. Refer to TM-82, "Diagnosis Procedure", TM-84, "Diagnosis
Procedure", EC-382, "Diagnosis Procedure", TM-49, "Diagnosis Procedure", TM-74, "Diagnosis
Procedure".
NO >> GO TO 3.
3.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
SAT638A
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-143
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Without CONSULT-III
1. Turn ignition switch “ON”.(Do not start engine)
2. Check voltage between A/T shift selector harness connector ter- minal and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
• Refer to TM-194, "
Checking of A/T Position".
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to TM-194, "
Adjustment of A/
T Position".
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
Monitor itemConditionDisplay value
OD CONT SW When setting the selector
lever to "4"
and "3" posi-
tion. ON
When setting selector le-
ver to other positions. OFF
Item Connector No. Terminal No. Condition Data
(Approx.)
4th position switch M203 1 - Ground When setting
the selector le-
ver to "4" and
"3" position.
0V
When setting
selector lever
to other posi-
tions. Battery voltage
AWDIA0810ZZ
SAT638A
LCIA0345E
Revision: March 2010
2008 QX56

TM-148
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
Without CONSULT-III
1. Turn ignition switch “ON”.(Do not start engine)
2. Check voltage between A/T shift selector harness connector ter-
minal and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
• Refer to TM-194, "
Checking of A/T Position".
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to TM-194, "
Adjustment of A/
T Position".
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
Monitor itemConditionDisplay value
1 POSITION SW When setting the selector
lever to "1" position.
ON
When setting selector le-
ver to other positions. OFF
Item Connector No. Terminal No. Condition Data
(Approx.)
1st position switch M203 7 - Ground When setting
the selector le-
ver to "1" posi-
tion.
0V
When setting
selector lever
to other posi-
tions. Battery voltage
AWDIA0811ZZ
SAT638A
LCIA0345E
Revision: March 2010
2008 QX56

SYSTEM SYMPTOMTM-149
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
2. Check A/T fluid condition. Refer to TM-178, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to TM-192, "
Cruise Test - Part 2"
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value"
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
9.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Vehicle Does Not Decelerate By Engine BrakeINFOID:0000000001604199
SYMPTOM:
No engine brake is applied when the gear is shifted from the 22 to 11.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis.
Do the self-diagnosis results i ndicate transmission range switch?
YES >> Check the malfunctioning system. Refer to TM-43, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITO R" mode for "TRANSMISSION" with CONSULT-III.
3. Read out "1 POSITION SW" moving switch selector lever to each position.
SCIA5199E
Revision: March 2010 2008 QX56

TM-150
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
Without CONSULT-III
1. Turn ignition switch “ON”.(Do not start engine)
2. Check voltage between A/T shift selector harness connector ter-
minal and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
• Refer to TM-194, "
Checking of A/T Position".
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to TM-194, "
Adjustment of A/
T Position".
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
Monitor itemConditionDisplay value
1 POSITION SW When setting the selector
lever to "1" position.
ON
When setting selector le-
ver to other positions. OFF
Item Connector No. Terminal No. Condition Data
(Approx.)
1st position switch M203 7 - Ground When setting
the selector le-
ver to "1" posi-
tion.
0V
When setting
selector lever
to other posi-
tions. Battery voltage
AWDIA0811ZZ
SAT638A
LCIA0345E
Revision: March 2010
2008 QX56

TM-174
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000001531485
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
• Be sure to turn the ignition switch “OFF” and disconnect the negative battery cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. Will
cause the MIL to light up.
• Be sure to connect and lock the connectors secure ly after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Be sure to route and secure th e harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to light up due to a short circuit.
• Be sure to connect rubber tubes properly afte r work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.
• Be sure to erase the unnecessary malfunction informa tion (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionINFOID:0000000001531486
NOTE:
If any malfunctions occur in the RE5R05A model tr ansmission, replace the entire transmission assem-
bly.
• Before connecting or disconn ecting the TCM harness connec-
tor, turn ignition switch “O FF” and disconnect negative bat-
tery cable. Because battery voltage is applied to TCM even if
ignition switch is turned “OFF”.
• After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.
If the repair is completed the DTC should not be displayed in the
“DTC CONFIRMATION PROCEDURE”.
• Always use the specified brand of ATF. Refer to MA-12, "
Fluids and Lubricants".
• Use paper rags not cloth rags during work.
• After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.
• Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to pre- vent the internal parts from becoming cont aminated by dirt or other foreign matter.
• Disassembly should be done in a clean work area.
• Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
• Place disassembled parts in order for easier and proper assembly.
SEF289H
SEF217U
Revision: March 2010 2008 QX56

TM-178
< ON-VEHICLE MAINTENANCE >
A/T FLUID
ON-VEHICLE MAINTENANCE
A/T FLUID
Checking the A/T Fluid (ATF)INFOID:0000000004917424
CAUTION:
If using the vehicle for towing, the A/T fluid must be replaced as specified. Refer to MA-8, "
Introduc-
tion of Periodic Maintenance".
1. Before driving, the A/T fluid level can be checked at A/T fluid temperatures of 30 ° to 50° C (86° to 122° F) using the “COLD”
range on the A/T fluid level gauge as follows:
a. Park the vehicle on a level surface and set the parking brake.
b. Start the engine and move the shift selector through each gear position. Move the shift selector into the “P” position.
c. Check the A/T fluid level with the engine idling.
d. Remove the A/T fluid level gauge and wipe it clean with a lint- free paper.
CAUTION:
When wiping the A/T fluid from the A/ T fluid level gauge,
always use a lint-free paper, not a cloth.
e. Re-insert the A/T fluid level gauge into the A/T fluid charging pipe until the cap contacts the t op of the A/T fluid charging pipe
as shown.
CAUTION:
To check A/T fluid level, insert th e A/T fluid level gauge until
the cap contacts the top of the A/T fluid charging pipe, with
the gauge reversed from th e normal inserted position.
f. Remove the A/T fluid level gauge and note the A/T fluid level. If the A/T fluid level is at low si de of range, add A/T fluid to the
transmission through the A/T fluid charging pipe.
CAUTION:
Do not overfill the transmission with A/T fluid.
g. Install the A/T fluid level gauge and the A/T fluid level gauge bolt.
2. Warm up the engine and transmission.
3. Check for any A/T fluid leaks.
4. Drive the vehicle to increase the A/T fluid temperature to 80 ° C (176 ° F).
LLIA0071E
A/T fluid level
gauge bolt : Refer to
TM-214, "Removal and Installation (2WD)" or TM-216, "Removal
and Installation (4WD)"
SCIA2899E
Revision: March 2010 2008 QX56

TM-180
< ON-VEHICLE MAINTENANCE >
A/T FLUID
Changing the A/T Fluid (ATF)
INFOID:0000000004917425
CAUTION:
If using the vehicle for towing, the A/T fl uid must be replaced as specified. Refer to MA-8, "
Introduc-
tion of Periodic Maintenance".
1. Drive the vehicle to warm up the A/T fluid to approximately 80 ° C (176 ° F).
2. Stop the engine.
3. Remove the A/T fluid level gauge.
4. Drain the A/T fluid from the drain plug hole, then install the drain plug with a new gasket. Refill the transmission with new A/T
fluid. Always refill with the same volume as the drained A/T fluid.
Use the A/T fluid level gauge to check the A/T fluid level as
shown. Add A/T fluid as necessary.
• To flush out the old A/T fluid from the transmission oil coolers, pour new A/T fluid into the A/T fluid charg-
ing pipe with the engine idling and at the same time drain the old A/T fluid from the auxiliary transmis-
sion oil cooler hose return line.
• When the color of the A/T fluid coming out of the auxiliary transmission oil cooler hose return line is
about the same as the color of the new A/T fluid, flushing out the old A/T fluid is complete. The amount
of new A/T fluid used for flushing should be 30% to 50% increase of the specified capacity.
CAUTION:
• Use only Genuine NISSAN Matic J ATF and do not mix with other fluids.
• Using A/T fluid other than Genuine NISSAN Mati c J ATF will cause deterioration in driveability
and automatic transmission durability, and may damage the automatic transmission, which is
not covered by the warranty.
• When filling the transmission with A/T fluid, do not spill the A/T fluid on any heat generating parts such as the exhaust manifold.
• Do not reuse the drain plug gasket.
5. Install the A/T fluid level gauge and tighten the A/T fluid level gauge bolt to specification.
6. Drive the vehicle to warm up the A/T fluid to approximately 80 ° C (176 ° F).
7. Check the fluid level and condition. If the A/T fluid is still dirty, repeat steps 2 through 6.
8. Install the A/T fluid level gauge in the A/T fluid charging pipe and install the A/T fluid level gauge bolt.
9. Tighten the A/T fluid level gauge bolt to specification. Drain plug : Refer to
TM-220, "
Component".
LLIA0071E
A/T fluid grade and capacity : Refer to MA-12, "Fluids and Lubricants".
A/T fluid level
gauge bolt : Refer to TM-214, "
Removal and Installation (2WD)" or TM-216, "Removal and
Installation (4WD)".
LLIA0071E
Revision: March 2010
2008 QX56