sensor INFINITI QX56 2009 Factory Service Manual

TM-140
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
2. Check A/T fluid condition. Refer to TM-179, "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 dam aged, repair or replace damaged parts. Refer to TM-152,
"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-191, "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-104, "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 dam aged, repair or replace damaged parts. Refer to TM-152,
"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:0000000003772004
SYMPTOM:
The lock-up condition cannot be ma intained 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 conv erter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-64, "Diagnosis Procedure", TM-52, "Diagnosis
Procedure", TM-47, "Diagnosis Procedure", TM-39, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
SCIA5199E
Revision: December 20092009 QX56

TM-142
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
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 conv erter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-64, "Diagnosis Procedure", TM-52, "Diagnosis
Procedure", TM-47, "Diagnosis Procedure", TM-39, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK SYMPTOM
Check again. Refer to TM-191, "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-104, "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:0000000003772006
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-179, "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 signal?
YES >> Check the malfunctioning system. Refer to TM-82, "Diagnosis Procedure", TM-84, "Diagnosis
Procedure", EC-374, "Diagnosis Procedure", TM-50, "Diagnosis Procedure", TM-74, "Diagnosis
Procedure".
NO >> GO TO 3.
3.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-203, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"
.
SAT638A
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-153
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
No. Items Symptom Condition Diagnostic Item Reference
page
1
Shift
Shock Large shock. (“N”
→“
D” position)
Refer to TM-122,
"Large Shock("N" to
"D" Position)" . ON vehicle 1. Engine idle speed
EC-17
2. Engine speed signalTM-52
3. Accelerator pedal position sensorTM-70
4. Control cable adjustmentTM-195
5. ATF temperature sensor TM-72
6. Front brake solenoid valveTM-82
7. CAN communication line LAN-4
8. Fluid level and stateTM-179
9. Line pressure testTM-188
10. Control valve with TCMTM-203
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8, TM-9 . TM-232
2 Shock is too large
when changing D1→

D
2. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Direct clutch TM-265
3Shock is too large
when changing D2→

D
3. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. High and low reverse clutch TM-263
Revision: December 20092009 QX56

TM-154
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
4Shift
Shock Shock is too large
when changing D3→

D
4. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Input clutch solenoid valve TM-80
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Input clutch TM-253
5Shock is too large
when changing D4→

D
5. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Front brake solenoid valve TM-82
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle10. Front brake (brake band)
TM-22011. Input clutchTM-253
6Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Engine speed signalTM-52
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-155
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
7
Shift
Shock Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Torque converter clutch solenoid valve TM-64
8. Fluid level and stateTM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Torque converter TM-203
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Fluid level and stateTM-179
5. Control valve with TCMTM-203
OFF vehicle6. Front brake (brake band)
TM-2037. Input clutchTM-203
8. High and low reverse clutchTM-203
9. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-156
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
10No Up
Shift Gear does not change
from D
→ D
2.
Refer to TM-131, "A/T
Does Not Shift:
D1ÆD2". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Direct clutch solenoid valve TM-84
4. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle 7. Direct clutch TM-203
11Gear does not change
from D
→ D3.
Refer to TM-132, "A/T
Does Not Shift:
D2ÆD3". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle 7. High and low reverse clutch TM-203
12Gear does not change
from D
→ D
4.
Refer to TM-134, "A/T
Does Not Shift:
D3ÆD4". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Input clutch solenoid valve TM-80
4. Front brake solenoid valveTM-82
5. Line pressure testTM-188
6. CAN communication line LAN-4
7. Control valve with TCMTM-203
OFF vehicle 8. Input clutch TM-203
13Gear does not change
from D
→ D
5.
Refer to TM-136, "A/T
Does Not Shift:
D4ÆD5". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Front brake solenoid valve TM-82
4. Direct clutch solenoid valveTM-84
5. Input speed sensorTM-47
6. Line pressure testTM-188
7. CAN communication line LAN-4
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-20310. Input clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-157
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
14
No Down
Shift In “D” or "4" range,
does not downshift to
4GR.
Refer to
TM-143, "A/T
Does Not Shift: 5GR
Æ 4GR". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Front brake solenoid valve TM-82
4. Direct clutch solenoid valveTM-84
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle8. Front brake (brake band)
TM-2039. Input clutchTM-203
15In “D” or "3" range,
does not downshift to
3GR.
Refer to
TM-145, "A/T
Does Not Shift: 4GR
Æ 3GR". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Input clutch solenoid valve TM-80
4. Front brake solenoid valveTM-82
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle 8. Input clutch TM-203
16In “D” or "2" range,
does not downshift to
2GR. Refer to
TM-147, "A/T Does Not
Shift: 3GR Æ 2GR".
. ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Line pressure testTM-188
6. Control valve with TCMTM-203
OFF vehicle 7. High and low reverse clutch TM-203
17In “D” or "1" range,
does not downshift to
1GR.
Refer to
TM-148, "A/T
Does Not Shift: 2GR
Æ 1GR". ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Line pressure testTM-188
6. Control valve with TCMTM-203
OFF vehicle 7. Direct clutch TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-158
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
18Slips/Will
Not en-
gage When “D” position, re-
mains in 1GR.
ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Direct clutch solenoid valve TM-84
4. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle7. 3rd one-way clutch
TM-251
8. 1st one-way clutchTM-258
9. Gear systemTM-203
10. Reverse brakeTM-203
11. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-203
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
19 When “D” position, re-
mains in 2GR. ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Low coast brake solenoid valve TM-88
4. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle7. 3rd one-way clutch
TM-203
8. Gear systemTM-203
9. Direct clutchTM-203
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-159
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
20
Slips/Will
Not en-
gage When “D” position, re-
mains in 3GR.
ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Line pressure test TM-188
4. CAN communication line LAN-4
5. Control valve with TCMTM-203
OFF vehicle6. 3rd one-way clutch
TM-203
7. Gear systemTM-203
8. High and low reverse clutchTM-203
9. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-203
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
21 When “D” position, re-
mains in 4GR. ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Input clutch solenoid valve TM-80
4. Direct clutch solenoid valveTM-84
5. High and low reverse clutch solenoid valveTM-86
6. Low coast brake solenoid valveTM-88
7. Front brake solenoid valveTM-82
8. Line pressure testTM-188
9. CAN communication line LAN-4
10. Control valve with TCMTM-203
OFF vehicle11. Input clutch
TM-20312. Gear systemTM-203
13. High and low reverse clutchTM-203
14. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-160
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
22Slips/Will
Not En-
gage When “D” position, re-
mains in 5GR.
ON vehicle1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Front brake solenoid valve TM-82
4. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle7. Front brake (brake band)
TM-2038. Input clutchTM-203
9. Gear systemTM-203
10. High and low reverse clutchTM-203
23Vehicle cannot be
started from D
1.
Refer to TM-129, "Ve-
hicle Cannot Be Start-
ed from D1". ON vehicle
1. Fluid level and state
TM-179
2. Accelerator pedal position sensor TM-70
3. Line pressure testTM-188
4. CAN communication line LAN-4
5. Control valve with TCMTM-203
OFF vehicle6. Torque converter
TM-203
7. Oil pump assemblyTM-249
8. 3rd one-way clutchTM-203
9. 1st one-way clutchTM-258
10. Gear systemTM-203
11. Reverse brakeTM-203
12. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-203
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
24 Does not lock-up.
Refer to
TM-138, "A/T Does Not Perform
Lock-up"
ON vehicle 1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Engine speed signal TM-52
4. Input speed sensorTM-47
5. Torque converter clutch solenoid valveTM-64
6. CAN communication line LAN-4
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-2039. Oil pump assemblyTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56