check engine INFINITI QX56 2010 Factory Service Manual

BRAKE SIGNAL CIRCUITTM-97
< COMPONENT DIAGNOSIS >
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BRAKE SIGNAL CIRCUIT
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005148681
Diagnosis ProcedureINFOID:0000000005148682
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to TM-40, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Read out ON/OFF switching action of the “BRAKESW”.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch terminals 1 and 2.
Check stop lamp switch after adjusting brake pedal — refer to
BR-15, "
Inspection and Adjustment".
OK or NG
OK >> Check stop lamp switch circuit.
NG >> Repair or replace stop lamp switch.
Item name Condition Display value
BRAKESW Depressed brake pedal.
ON
Released brake pedal. OFF
ConditionContinuity
When brake pedal is depressed. Yes
When brake pedal is released. No
AWDIA0165ZZ
Revision: April 20092010 QX56

TM-98
< COMPONENT DIAGNOSIS >
TOW MODE SWITCH
TOW MODE SWITCH
DescriptionINFOID:0000000005148683
When tow mode switch is “ON”, tow mode switch signals are sent to TCM from combination meter by CAN
communication line.Then it`s a tow mode condition.
Diagnosis ProcedureINFOID:0000000005148684
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Is any malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to TM-40.
NO >> GO TO 2.
2.CHECK POWER SOURCE
1. Turn ignition switch “ON”. (Do not start engine.)
2. Check the voltage between tow mode switch connector M258 terminal 1 and ground.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.CHECK TOW MODE SWITCH
1. Turn ignition switch “OFF”.
2. Disconnect tow mode switch connector.
3. Check continuity between tow mode switch terminals 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace tow mode switch.
4.DETECT MALFUNCTIONING ITEM
Check the following items. If any items are damaged, repair or replace damaged parts.
• Harness for short or open between combination meter connector terminal 35 and tow mode switch connec- tor terminal 1.
• Harness for short or open between tow mode switch connector terminal 2 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK COMBINATION METER
Check the combination meter. Refer to MWI-4, "
Work Flow".
OK or NG
OK >> INSPECTION END
NO >> Repair or replace damaged parts.
Condition To w m o d e
switch Data (Approx.)
When ignition switch is turned to “ON” ON
0V
OFF Battery voltage
SCIA5156E
Condition Continuity
Tow mode switch “ON” Yes
Tow mode switch “OFF” No
SCIA5584E
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TM-106
< ECU DIAGNOSIS >
TCM
ECU DIAGNOSIS
TCM
Reference ValueINFOID:0000000005148688
REFERENCE VALUES
NOTICE:
1. The CONSULT-III electrically displays shift timing and lock-up timing (that is, operation timing of eachsolenoid).
Check for time difference between actual shift timi ng and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sens ors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) display ed on CONSULT-III and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
- Actual shift schedule has more or less tolerance or allowance,
- Shift schedule indicated in Service Manual refers to the point where shifts start, and
- Gear position displayed on CONSULT-III indicates the point where shifts are completed.
3. Display of solenoid valves on CONSULT-III changes at t he start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).
Item name Condition Display value (Approx.)
AT F T E M P S E 1 0°C (32 ° F) - 20 °C (68 °F) - 80 °C (176 °F) 3.3 - 2.7 - 0.9 V
TCC SOLENOID When perform slip lock-up.
0.2 - 0.4 A
When perform lock-up. 0.4 - 0.6 A
SLCT LVR POSI Selector lever in “N”,“P” position.
N/P
Selector lever in “R” position. R
Selector lever in “D” position. D
Selector lever in “4” position. 4
Selector lever in “3” position. 3
Selector lever in “2” position. 2
Selector lever in “1” position. 1
VHCL/S SE-A/T During driving Approximately matches the
speedometer reading.
ENGINE SPEED Engine running Closely matches the tachometer
reading.
LINE PRES SOL During driving 0.2 - 0.6 A
INPUT SPEED During driving (lock-up ON) Approximately matches the en-
gine speed.
VHCL/S SE-MTR During driving Approximately matches the
speedometer reading.
ATF PRES SW 2 Low coast brake engaged. Refer to
TM-9
.ON
Low coast brake disengaged. Refer to TM-9
.OFF
I/C SOLENOID Input clutch disengaged. Refer to
TM-9
.0.6 - 0 .8 A
Input clutch engaged. Refer to TM-9
.0 - 0 .0 5 A
FR/B SOLENOID Front brake engaged. Refer to
TM-9
.0 .6 - 0 .8 A
Front brake disengaged. Refer to TM-9
.0 - 0 .0 5 A
D/C SOLENOID Direct clutch disengaged. Refer to
TM-9
.0.6 - 0 .8 A
Direct clutch engaged. Refer to TM-9
.0 - 0 .0 5 A
HLR/C SOL High and low reverse clutch disengaged. Refer to
TM-9
.0.6 - 0 .8 A
High and low reverse clutch engaged. Refer to TM-9
.0 - 0 .0 5 A
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-121
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
SYSTEM SYMPTOM
Symptom TableINFOID:0000000005148715
• The diagnostics item numbers s how the sequence for inspection. Inspect in order from item 1.
• Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to TM-148, "
Checking the
A/T Fluid (ATF)".
No. ItemsSymptom Condition Diagnostic ItemReference
page
1
Shift
Shock Large shock. (“N”
→“
D” position) ON vehicle1. Engine idle speed
EC-17
2. Engine speed signalTM-53
3. Accelerator pedal position sensorTM-71
4. Control cable adjustmentTM-164
5. ATF temperature sensor TM-73
6. Front brake solenoid valveTM-84
7. CAN communication line LAN-4
8. Fluid level and stateTM-148
9. Line pressure testTM-157
10. Control valve with TCMTM-172
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8, TM-9 . TM-204
2 Shock is too large
when changing D1→
D
2. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. Direct clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle 10. Direct clutch TM-239
3Shock is too large
when changing D2→
D
3. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. High and low reverse clutch solenoid valve TM-88
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle 10. High and low reverse clutch TM-237
Revision: April 20092010 QX56

TM-142
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
65Others Engine speed does
not return to idle.
ON vehicle1. Fluid level and state
TM-148
2. Direct clutch solenoid valve TM-86
3. Front brake solenoid valveTM-84
4. Accelerator pedal position sensorTM-71
5. Output speed sensor and vehicle speed signalTM-50,
TM-76
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Front brake (brake band)
TM-1729. Direct clutchTM-172
66A/T CHECK indicator
lamp does not come
on. ON vehicle1. CAN communication line
LAN-42. Combination meterMWI-22
3. TCM power supply TM-94
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-148
< ON-VEHICLE MAINTENANCE >
A/T FLUID
ON-VEHICLE MAINTENANCE
A/T FLUID
Checking the A/T Fluid (ATF)INFOID:0000000005148722
CAUTION:
If using the vehicle for towing, the A/T fluid must be replaced as specified. Refer to MA-9, "
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 selector lever through each gear position. Shift the selector lever 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-186, "Removal and Installation (2WD)" or TM-188, "Removal
and Installation (4WD)"
SCIA2899E
Revision: April 20092010 QX56

TM-150
< ON-VEHICLE MAINTENANCE >
A/T FLUID
Changing the A/T Fluid (ATF)
INFOID:0000000005148723
CAUTION:
If using the vehicle for towing, the A/T fl uid must be replaced as specified. Refer to MA-9, "
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:
• If Genuine NISSAN Matic S ATF is not available, Genuine NISSAN Matic J ATF may also be used.
• Using ATF fluid other than Genuine NISSAN Matic S ATF or Matic J ATF will cause deterioration in driveability and A/T durability, and may damage the A/T, 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 parts.
• 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-192, "
Component".
LLIA0071E
A/T fluid grade and capacity : Refer to MA-13, "Fluids and Lubricants".
A/T fluid level
gauge bolt : Refer to TM-186, "
Removal and Installation (2WD)" or TM-188, "Removal and
Installation (4WD)".
LLIA0071E
Revision: April 20092010 QX56

STALL TESTTM-155
< ON-VEHICLE MAINTENANCE >
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STALL TEST
Inspection and JudgmentINFOID:0000000005148726
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
• Inspect for fluid leakage and check the fluid level. Refer to TM-148, "Checking the A/T Fluid (ATF)".
Fluid Condition Check
Inspect the fluid condition.
STALL TEST
Stall Test Procedure
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle so that the A/
T fluid temperature is 50 to 80 °C (122 to 176 °F). Inspect the
amount of ATF. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
Fluid condition Conceivable Cause Required Operation
Varnished (viscous
varnish state) Clutch, brake
scorchedReplace the ATF and check the A/T
main unit and the vehicle for mal-
functions (wire harnesses, cooler
pipes, etc.)
Milky white or
cloudy Water in the fluidReplace the ATF and check for plac-
es where water is getting in.
Large amount of
metal powder mixed
in Unusual wear of
sliding parts within
A/T
Replace the ATF and check for im-
proper operation of the A/T.
SAT638A
SAT647B
SCIA1224E
Revision: April 20092010 QX56

ROAD TESTTM-159
< ON-VEHICLE MAINTENANCE >
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ROAD TEST
DescriptionINFOID:0000000005148728
ROAD TEST
• The road test inspects overall performance of the A/T and analyzes possible malfunction causes.
• The road test is carried out in the following three stages.
1. Check before engine is started. Refer to TM-159
.
2. Check at idle. Refer to TM-159
.
3. Cruise test • Inspect all the items from Part 1 to Part 3. Refer to TM-160
, TM-162, TM-162.
• Before beginning the road test, check the test procedure and inspection items.
• Test all inspection items until the symptom is uncov ered. Diagnose NG items when all road tests are com-
plete.
Check Before Engine Is StartedINFOID:0000000005148729
1.CHECK AT CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch to “OFF” position and wait at least 10 seconds.
4. Turn ignition switch to “ON” position. (Do not start engine.)
Does AT CHECK indicator lamp light up for about 2 seconds?
YES >> 1. Turn ignition switch to “OFF” position. 2. Carry out the self-diagnostics and record all NG items on the diagnostics worksheet. Refer toTM-32, "
CONSULT-III Function (TRANSMISSION)".
3. Go to TM-159, "
Check At Idle".
NO >> Stop the road test and go to TM-121, "
Symptom Table".
Check At IdleINFOID:0000000005148730
1.CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch to “OFF” position.
4. Turn ignition switch to “START” position.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to TM-121, "
Symptom Table".
2.CHECK STARTING THE ENGINE
1. Turn ignition switch to “ON” position.
2. Move selector lever in “D”,“4”, “3”, “2”, “1” or “R” position.
3. Turn ignition switch to “START” position.
Does the engine start in either position?
YES >> Stop the road test and go to TM-121, "Symptom Table".
NO >> GO TO 3.
3.CHECK “P” POSITION FUNCTIONS
1. Move selector lever to “P” position.
2. Turn ignition switch to “OFF” position.
3. Release the parking brake.
4. Push the vehicle forward or backward.
5. Engage the parking brake.
When you push the vehicle with disengaging the parking brake, does it move?
Revision: April 20092010 QX56

TM-160
< ON-VEHICLE MAINTENANCE >
ROAD TEST
YES >> Record the malfunction, GO TO 4.
NO >> GO TO 4.
4.CHECK “N” POSITION FUNCTIONS
1. Start the engine.
2. Move selector lever to “N” position.
3. Release the parking brake.
Does vehicle move forward or backward?
YES >> Record the malfunction, GO TO 5.
NO >> GO TO 5.
5.CHECK SHIFT SHOCK
1. Engage the brake.
2. Move selector lever to “D” position.
When the transmission is shifted from
“N” to “D”, is there an excessive shock?
YES >> Record the malfunction, GO TO 6.
NO >> GO TO 6.
6.CHECK “R” POSITION FUNCTIONS
1. Engage the brake.
2. Move selector lever to “R” position.
3. Release the brake for 4 to 5 seconds.
Does the vehicle creep backward?
YES >> GO TO 7.
NO >> Record the malfunction, GO TO 7.
7.CHECK “D” POSITION FUNCTIONS
Inspect whether the vehicle creeps forward when the transmission is put into the “D” position.
Does the vehicle creep forward in the
“D” positions?
YES >> Go to TM-160, "Cruise Test - Part 1".
NO >> Record the malfunction and go to TM-160, "
Cruise Test - Part 1".
Cruise Test - Part 1INFOID:0000000005148731
1.CHECK STARTING OUT FROM D1
1. Drive the vehicle for about 10 minutes to warm up the engine oil and ATF. Appropriate temperature for the ATF: 50 - 80° C (122 - 176°F)
2. Park the vehicle on a level surface.
3. Move selector lever to “P” position.
4. Start the engine.
5. Move selector lever to “D” position.
6. Press the accelerator pedal about half way down to accelerate the vehicle.
With CONSULT-III
Read off the gear positions.
Starts from D1?
YES >> GO TO 2.
NO >> Record the malfunction, GO TO 2.
2.CHECK SHIFT-UP D1 → D2
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D1 → D2) at the appropri-
ate speed.
• Refer to TM-265, "
Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Record the malfunction, GO TO 3.
Revision: April 20092010 QX56