2007 INFINITI M35 parts

AT-46
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
How to Perform Trouble Diagnosis for Quick and Accurate RepairNCS001K4
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, accelera-
tor pedal position sensor (throttle position sensor) or PNP switch and
provides shift control or lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a error that occurs intermittently
rather than continuously. Most intermittent errors are caused by poor
electric connections or improper wiring. In this case, careful check-
ing of suspected circuits may help prevent the replacement of good
parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-II (or GST) or a circuit tester connected should be
performed. Follow the AT- 4 7 , "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to AT- 4 8
) should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
SAT631IB
SAT632I
SEF234G

AT-50
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
44-3Part 2AT- 6 1
❏ AT-199, "Vehicle Cannot Be Started from D1"
❏ AT-201, "A/T Does Not Shift: D1 → D2"
❏ AT-203, "A/T Does Not Shift: D2 → D3"
❏ AT-205, "A/T Does Not Shift: D3 → D4"
Part 3AT- 6 1
❏ AT-213, "Cannot Be Changed to Manual Mode"
❏ AT-214, "A/T Does Not Shift: 5th Gear → 4th Gear"
❏ AT-215, "A/T Does Not Shift: 4th Gear → 3rd Gear"
❏ AT-217, "A/T Does Not Shift: 3rd Gear → 2nd Gear"
❏ AT-218, "A/T Does Not Shift: 2nd Gear → 1st Gear"
❏ AT-220, "Vehicle Does Not Decelerate by Engine Brake"
❏ Perform self-diagnostics. Enter checks for detected items. AT- 9 2 , AT-103
❏ AT-105, "DTC U1000 CAN COMMUNICATION LINE"
❏ AT-108, "DTC P0615 START SIGNAL CIRCUIT"
❏ AT- 11 2 , "DTC P0700 TCM"
❏ AT- 11 3 , "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ AT- 11 7 , "DTC P0717 TURBINE REVOLUTION SENSOR"
❏ AT- 11 9 , "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"
❏ AT-124, "DTC P0725 ENGINE SPEED SIGNAL"
❏ AT-126, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ AT-128, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ AT-130, "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ AT-132, "DTC P1705 THROTTLE POSITION SENSOR"
❏ AT-135, "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"
❏ AT-140, "DTC P1721 VEHICLE SPEED SENSOR MTR"
❏ AT-142, "DTC P1730 A/T INTERLOCK"
❏ AT-145, "DTC P1731 A/T 1ST ENGINE BRAKING"
❏ AT-147, "DTC P1752 INPUT CLUTCH SOLENOID VALVE"
❏ AT-149, "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-151, "DTC P1757 FRONT BRAKE SOLENOID VALVE"
❏ AT-153, "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"
❏ AT-155, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
❏ AT-157, "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-159, "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"
❏ AT-161, "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION"
❏ AT-163, "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"
❏ AT-165, "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"
❏ AT-167, "DTC P1815 MANUAL MODE SWITCH"
❏ AT-172, "DTC P1841 ATF PRESSURE SWITCH 1"
❏ AT-174, "DTC P1843 ATF PRESSURE SWITCH 3"
❏ AT-176, "DTC P1845 ATF PRESSURE SWITCH 5"
❏ AT-178, "DTC P1846 ATF PRESSURE SWITCH 6"
5❏ Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunctioning parts.
6❏ Perform all road tests and enter the checks again for the required items.AT- 5 7
7❏ For any remaining NG items, perform the “Diagnostics Procedure” and repair or replace the malfunctioning
parts. See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection pro-
cedures.)AT- 6 4
8❏ Erase the results of the self-diagnostics from the TCM.AT- 9 6, AT-
104

TROUBLE DIAGNOSIS
AT-51
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
A/T Electrical Parts LocationNCS001K5
SCIA6772E

TROUBLE DIAGNOSIS
AT-53
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
Inspections before Trouble DiagnosisNCS001K7
A/T FLUID CHECK
A/T Fluid Leakage and A/T Fluid Level Check
Inspect for A/T fluid leakage and check the A/T fluid level. Refer to AT- 1 3 , "Checking A/T Fluid" .
A/T Fluid Condition Check
Inspect the A/T 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.
4. Engine start, apply foot brake, and place selector lever in “D”
position.
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
places where water is getting in.
Large amount of metal
powder mixed inUnusual wear of
sliding parts within
A/TReplace the ATF and check for
improper operation of the A/T.
SAT638A
SAT647B
SCIA7463E
SCIA6787E

AT-64
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
AW D M OD E LS

At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)

At half throttle, the accelerator opening is 4/8 of the full opening.
Symptom ChartNCS001KF

The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.

Overhaul and inspection inside the A/T only if A/T fluid condition is NG. Refer to AT- 5 3 , "A/T Fluid Condi-
tion Check" .
Engine model VQ35DE
Throttle positionVehicle speed km/h (MPH)
Lock-up ON Lock-up OFF
Closed throttle 51 - 59 (32 - 37) 48 - 56 (30 - 35)
Half throttle 188 - 196 (117 - 122) 132 - 140 (82 - 87)
No. Item Symptom Condition Diagnostic ItemReference
page
1Shift
ShockLarge shock. (“N” →
“D” position)
Refer to AT-193,
"Large Shock (“N” to
“D” Position)" .ON vehicle1. Engine idle speedEC-83
(for
VQ35DE
engine),
EC-785

(for
VK45DE
engine)
2. Engine speed signalAT- 1 2 4
3. Accelerator pedal position sensorAT- 1 3 2
4. A/T positionAT- 2 2 7
5. A/T fluid temperature sensorAT- 1 3 5
6. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2,
AT- 1 5 1
7. CAN communication lineAT- 1 0 5
8. A/T fluid level and stateAT- 5 3
9. Line pressure testAT- 5 5
10. Control valve with TCMAT- 2 3 6
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1

AT-70
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
18
Slips/Will
Not
EngageWhen “D” or “M” posi-
tion, remains in 1st
gear.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT- 1 4 0
3. Direct clutch solenoid valveAT- 1 5 5
4. Line pressure testAT- 5 5
5. CAN communication lineAT- 1 0 5
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. 3rd one-way clutchAT- 3 2 5
8. 1st one-way clutchAT- 3 3 3
9. Gear systemAT- 2 8 1
10. Reverse brakeAT- 3 0 1
11. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-Sectional View (VQ35DE Models for 2WD)" ,
AT-18, "
Cross-Sectional View (VK45DE Models for 2WD)" or
AT-19, "
Cross-Sectional View (AWD Models)" .)AT- 3 0 1
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
19When “D” or “M” posi-
tion, remains in 2nd
gear.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT- 1 4 0
3. Low coast brake solenoid valveAT- 1 6 3
4. Line pressure testAT- 5 5
5. CAN communication lineAT- 1 0 5
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. 3rd one-way clutchAT- 3 2 5
8. Gear systemAT- 2 8 1
9. Direct clutchAT- 3 4 1
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
No. Item Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSIS
AT-71
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
20
Slips/Will
Not
EngageWhen “D” or “M” posi-
tion, remains in 3rd
gear.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT-140
3. Line pressure testAT- 5 5
4. CAN communication lineAT-105
5. Control valve with TCMAT-236
OFF vehicle6. 3rd one-way clutchAT-325
7. Gear systemAT-281
8. High and low reverse clutchAT-339
9. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7 , "
Cross-Sectional View (VQ35DE Models for 2WD)" ,
AT- 1 8 , "
Cross-Sectional View (VK45DE Models for 2WD)" or
AT- 1 9 , "
Cross-Sectional View (AWD Models)" .)AT-301
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT- 1 8 ,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT- 1 9 ,
"Cross-Sectional View (AWD Models)" .)AT-301
21When “D” or “M” posi-
tion, remains in 4th
gear.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT-140
3. ATF pressure switch 3 and input clutch solenoid valveAT-174,
AT-147
4. ATF pressure switch 5 and direct clutch solenoid valveAT-176,
AT-155
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT-178,
AT-159
6. Low coast brake solenoid valveAT-163
7. Front brake solenoid valveAT-151
8. Line pressure testAT- 5 5
9. CAN communication lineAT-105
10. Control valve with TCMAT-236
OFF vehicle11. Input clutchAT-32712. Gear systemAT-281
13. High and low reverse clutchAT-339
14. Direct clutchAT-341
No. Item Symptom Condition Diagnostic ItemReference
page

AT-72
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
22
Slips/Will
Not
EngageWhen “D” or “M” posi-
tion, remains in 5th
gear.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT- 1 4 0

3. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2
,
AT- 1 5 1
4. Line pressure testAT- 5 5
5. CAN communication lineAT- 1 0 5
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. Front brake (brake band)AT- 3 0 18. Input clutchAT- 3 2 7
9. Gear systemAT- 2 8 1
10. High and low reverse clutchAT- 3 3 9
23Vehicle cannot be
started from D
1 .
Refer to AT-199,
"Vehicle Cannot Be
Started from D1" .ON vehicle1. A/T fluid level and stateAT- 5 3
2. Accelerator pedal position sensorAT- 1 3 2
3. Line pressure testAT- 5 5
4. CAN communication lineAT- 1 0 5
5. Control valve with TCMAT- 2 3 6
OFF vehicle6. Torque converterAT- 3 0 1
7. Oil pump assemblyAT- 3 2 2
8. 3rd one-way clutchAT- 3 2 5
9. 1st one-way clutch AT- 3 3 3
10. Gear systemAT- 2 8 1
11. Reverse brakeAT- 3 0 1
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-Sectional View (VQ35DE Models for 2WD)" ,
AT-18, "
Cross-Sectional View (VK45DE Models for 2WD)" or
AT-19, "
Cross-Sectional View (AWD Models)" .)AT- 3 0 1
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
24Does not lock-up.
Refer to AT-209, "A/T
Does Not Lock-up" .ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Engine speed signalAT- 1 2 4
4. Turbine revolution sensorAT- 11 7
5. Torque converter clutch solenoid valveAT- 1 2 6
6. CAN communication lineAT- 1 0 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Torque converterAT- 3 0 19. Oil pump assemblyAT- 3 2 2
No. Item Symptom Condition Diagnostic ItemReference
page