2010 INFINITI QX56 sensor

TM-136
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
41Slips/Will
Not En-
gage While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. CAN communication line LAN-4
5. Front brake solenoid valveTM-84
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. Front brake (brake band)TM-172
10. Input clutchTM-172
11. Gear systemTM-172
12. High and low reverse clutchTM-172
42Slips at lock-up. ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Engine speed signal TM-53
4. Input speed sensorTM-48
5. Torque converter clutch solenoid valveTM-65
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-1729. Oil pump assemblyTM-172
43No creep at all. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. Direct clutch solenoid valveTM-86
5. Transmission range switchTM-45
6. CAN communication line LAN-4
7. Control cable adjustmentTM-164
8. Control valve with TCMTM-172
OFF vehicle9. Torque converter
TM-172
10. Oil pump assemblyTM-172
11. 1st one-way clutchTM-172
12. Gear systemTM-172
13. Reverse brakeTM-172
14. Direct clutchTM-172
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-137
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
44
Slips/Will
Not En-
gage Vehicle cannot run in
all positions.
ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Oil pump assembly
TM-1727. Gear systemTM-172
8. Output shaftTM-172
45With selector lever in
“D” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Torque converter
TM-172
7. Oil pump assembly TM-172
8. 1st one-way clutchTM-172
9. Gear systemTM-172
10. Reverse brakeTM-172
11. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9.TM-172
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
46 With selector lever in
“R” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Gear system
TM-1727. Output shaftTM-172
8. Reverse brakeTM-172
47 OthersShift point is high in
“D” position. ON vehicle1. Output speed sensor and vehicle speed signal
TM-50
,
TM-76
2. Accelerator pedal position sensor TM-71
3. CAN communication line LAN-4
4. ATF temperature sensorTM-73
5. Control valve with TCMTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-138
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
48Others Shift point is low in “D”
position.
ON vehicle1. Output speed sensor and vehicle speed signal
TM-50
,
TM-76
2. Accelerator pedal position sensor TM-71
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
49Judder occurs during
lock-up. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Output speed sensor and vehicle speed signalTM-50,
TM-76
5. Accelerator pedal position sensor TM-71
6. CAN communication line LAN-4
7. Torque converter clutch solenoid valveTM-65
8. Control valve with TCMTM-172
OFF vehicle 9. Torque converter TM-172
50Strange noise in “R”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-172
6. Oil pump assemblyTM-172
7. Gear systemTM-172
8. High and low reverse clutchTM-237
9. Reverse brakeTM-172
51Strange noise in “N”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-1726. Oil pump assemblyTM-172
7. Gear systemTM-172
52Strange noise in “D”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-172
6. Oil pump assemblyTM-172
7. Gear systemTM-172
8. Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-140
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
56Others Maximum speed low.
ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. CAN communication line LAN-4
5. Direct clutch solenoid valveTM-86
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. Input clutchTM-172
10. Gear systemTM-172
11. High and low reverse clutchTM-172
12. Direct clutchTM-172
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
14 Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
,
TM-9. TM-172
57
Extremely large creep. ON vehicle1. Engine idle speed
EC-172. CAN communication lineLAN-4
OFF vehicle 3. Torque converter TM-172
58With selector lever in
“P” position, vehicle
does not enter parking
condition or, with se-
lector lever in another
position, parking con-
dition is not cancelled. ON vehicle
1. Transmission range switch
TM-45
2. Control cable adjustmentTM-164
OFF vehicle 3. Parking pawl components TM-172
59Vehicle runs with
transmission in “P” po-
sition. ON vehicle1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. Control valve with TCMTM-172
5. Parking pawl componentsTM-172
OFF vehicle 6. Gear system TM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-141
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
60
Others Vehicle runs with
transmission in “N” po-
sition.
ON vehicle
1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. Control valve with TCMTM-172
OFF vehicle5. Input clutch
TM-172
6. Gear systemTM-172
7. Direct clutchTM-172
8. Reverse brakeTM-172
9. Forward one- way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9. TM-172
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
61 Engine does not start
in “N” or “P” position. ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-164
3. Transmission range switch TM-45
62Engine starts in posi-
tions other than “N” or
“P”. ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-164
3. Transmission range switch TM-45
63Engine stall. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Torque converter clutch solenoid valveTM-65
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle 7. Torque converter TM-172
64Engine stalls when se-
lect lever shifted “N”
→
“D”, “R”. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Torque converter clutch solenoid valveTM-65
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle 7. Torque converter TM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
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-158
< ON-VEHICLE MAINTENANCE >
LINE PRESSURE TEST
5. Start the engine, then measure the line pressure at both idle andthe stall speed.
CAUTION:
• Keep the brake pedal pressed all the way down duringmeasurement.
• When measuring the line pressure at the stall speed, refer
to TM-155, "
Inspection and Judgment".
6. After the measurements are complete, install the oil pressure detection plug and tighten to the regulation torque below.
CAUTION:
Do not reuse the O-ring.
Line Pressure
Judgement of Line Pressure Test
Oil pressure detection
plug :7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
Engine speed
Line pressure [kPa (kg/cm
2, psi)]
“R” position “D” position
At idle speed 425 - 465 (4.3 - 4.7, 62 - 67) 379 - 428 (3.9 - 4.4, 55 - 62)
At stall speed 1,605 - 1,950 (16.4 - 19.9, 233 - 283) 1,310 - 1,500 (13.4 - 15.3, 190 - 218)
Judgement Possible cause
Idle speed Low for all positions
(P, R, N, D)
Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
•Oil pump wear
• Pressure regulator valve or plug sticking or spring fatigue
• Oil strainer ⇒ oil pump
⇒ pressure regulator valve passage oil leak
• Engine idle speed too low
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High Possible causes include a sensor malfunction or malfunction in the line pressure adjustment func-
tion.
For example
• Accelerator pedal position signal malfunction
• ATF temperature sensor malfunction
• Line pressure solenoid malfunction (sticking in “OFF” state, filter clog, cut line)
• Pressure regulator valve or plug sticking
Sta ll sp ee d Oil pressure does
not rise higher than
the oil pressure for
idle.
Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example
• Accelerator pedal position signal malfunction
• TCM breakdown
• Line pressure solenoid malfunction (shorting, sticking in“ ON” state)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Line pressure solenoid malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
Revision: April 20092010 QX56

TM-172
< ON-VEHICLE REPAIR >
CONTROL VALVE WITH TCM
CONTROL VALVE WITH TCM
Control Valve with TCM and A/T Fluid Temperature Sensor 2 and PlugINFOID:0000000005148741
COMPONENTS
CONTROL VALVE WITH TCM REMOVAL AND INSTALLATION
Removal
1. Disconnect negative battery terminal.
2. Drain A/T fluid. Refer to TM-150, "
Changing the A/T Fluid (ATF)".
3. Disconnect A/T assembly harness connector.
1. Transmission 2. Snap ring3. Sub-harness
4. Control valve with TCM 5. Bracket 6. A/T fluid temperature sensor 2
7. Oil pan gasket 8. Brackets9. Oil pan bolt
10. Oil pan 11. Magnet12. Drain plug
13. Drain plug gasket 14. Terminal cord assembly 15. O-ring
16. O-ring 17. Plug
A/T fluid temperature sensor 2 (A) can be changed to plug (B), depending on vehicles.
JSDIA1314GB
Revision: April 20092010 QX56