2007 INFINITI M35 low oil pressure

AT-76
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
32
Slips/Will
Not
EngageWhen you press the
accelerator pedal and
shift speed D4 → D3
or M
4 → M3 the
engine idles or the A/
T slips.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 3 and input clutch solenoid valveAT- 1 7 4,
AT- 1 4 7
4. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2,
AT- 1 5 1
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Torque converterAT- 3 0 1
9. Oil pump assemblyAT- 3 2 2
10. 3rd one-way clutchAT- 3 2 5
11. Gear systemAT- 2 8 1
12. High and low reverse clutchAT- 3 3 9
13. 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
14. 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
33When you press the
accelerator pedal and
shift speed D3 → D2
or M
3 → M2 the
engine idles or the A/
T slips.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 6, high and low reverse clutch sole-
noid valveAT- 1 7 8,
AT- 1 5 9
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 7 6,
AT- 1 5 5
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Torque converterAT- 3 0 1
9. Oil pump assemblyAT- 3 2 2
10. 3rd one-way clutch AT- 3 2 5
11. Gear system
12. Direct clutchAT- 3 4 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
No. Item Symptom Condition Diagnostic ItemReference
page

AT-78
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
36
Slips/Will
Not
EngageWith selector lever in
“R” position, accelera-
tion is extremely poor.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT- 1 3 2
4. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 7 8,
AT- 1 5 9
5. CAN communication lineAT- 1 0 5
6. PNP switchAT- 11 3
7. A/T positionAT- 2 2 7
8. Control valve with TCMAT- 2 3 6
OFF vehicle9. Gear systemAT- 2 8 110. Output shaft AT- 3 0 1
11. Reverse brakeAT- 3 0 1
37While starting off by
accelerating in 1st,
engine races or slip-
page occurs.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT- 1 3 2
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 clutchAT- 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
No. Item Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSIS
AT-79
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
38
Slips/Will
Not
EngageWhile accelerating in
2nd, engine races or
slippage occurs.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT-132
4. CAN communication lineAT-105
5. ATF pressure switch 5 and direct clutch solenoid valveAT-176,
AT-155
6. Control valve with TCMAT-236
OFF vehicle7. Torque converterAT-301
8. Oil pump assemblyAT-322
9. 3rd one-way clutchAT-325
10. Gear systemAT-281
11. Direct clutchAT-341
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- 1 8 ,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT- 1 9 ,
"Cross-Sectional View (AWD Models)" .)AT-301
39While accelerating in
3rd, engine races or
slippage occurs.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT-132
4. CAN communication lineAT-105
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT-178,
AT-159

6. Control valve with TCMAT-236
OFF vehicle7. Torque converterAT-301
8. Oil pump assemblyAT-322
9. 3rd one-way clutchAT-325
10. Gear systemAT-281
11. High and low reverse clutchAT-339
12. 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
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- 1 8 ,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT- 1 9 ,
"Cross-Sectional View (AWD Models)" .)AT-301
No. Item Symptom Condition Diagnostic ItemReference
page

AT-80
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
40
Slips/Will
Not
EngageWhile accelerating in
4th, engine races or
slippage occurs.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT- 1 3 2
4. CAN communication lineAT- 1 0 5
5. ATF pressure switch 3 and input clutch solenoid valveAT- 1 7 4,
AT- 1 4 7
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. Torque converterAT- 3 0 1
8. Oil pump assemblyAT- 3 2 2
9. Input clutchAT- 3 2 7
10. Gear systemAT- 2 8 1
11. High and low reverse clutchAT- 3 3 9
12. Direct clutchAT- 3 4 1
41While accelerating in
5th, engine races or
slippage occurs.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT- 1 3 2
4. CAN communication lineAT- 1 0 5
5. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2,
AT- 1 5 1
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. Torque converterAT- 3 0 1
8. Oil pump assembly AT- 3 2 2
9. Front brake (brake band)AT- 3 0 1
10. Input clutchAT- 3 2 7
11. Gear systemAT- 2 8 1
12. High and low reverse clutchAT- 3 3 9
42 Slips at 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

TROUBLE DIAGNOSIS
AT-85
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
57
OthersStrange noise in “D”
position.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Engine speed signalAT-124
3. CAN communication lineAT-105
4. Control valve with TCMAT-236
OFF vehicle5. Torque converterAT-301
6. Oil pump assemblyAT-322
7. Gear systemAT-281
8. 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
58Vehicle dose not
decelerate by engine
brake.
Refer to AT-220,
"Vehicle Does Not
Decelerate by Engine
Brake" .ON vehicle1. PNP switchAT- 11 3
2. A/T fluid level and stateAT- 5 3
3. A/T positionAT-227
4. Manual mode switchAT-167
5. ATF pressure switch 5AT-176
6. CAN communication lineAT-105
7. Control valve with TCMAT-236
OFF vehicle8. Input clutchAT-3279. High and low reverse clutchAT-339
10. Direct clutchAT-341
59Engine brake does
not work M5 → M4.ON vehicle1. PNP switchAT- 11 3
2. A/T fluid level and stateAT- 5 3
3. A/T positionAT-227
4. Manual mode switchAT-167
5. ATF pressure switch 1AT-172
6. CAN communication lineAT-105
7. Control valve with TCMAT-236
OFF vehicle 8. Front brake (brake band) AT-301
60Engine brake does
not work M4 → M3.ON vehicle1. PNP switchAT- 11 3
2. A/T fluid level and stateAT- 5 3
3. A/T positionAT-227
4. Manual mode switchAT-167
5. ATF pressure switch 1 and ATF pressure switch 3AT-172,
AT-174
6. CAN communication lineAT-105
7. Control valve with TCMAT-236
OFF vehicle8. Front brake (brake band)AT-3019. Input clutchAT-327
No. Item Symptom Condition Diagnostic ItemReference
page

AT-86
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
61
OthersEngine brake does
not work M3 → M2.ON vehicle1. PNP switchAT- 11 3
2. A/T fluid level and stateAT- 5 3
3. A/T positionAT- 2 2 7
4. Manual mode switchAT- 1 6 7
5. ATF pressure switch 6AT- 1 7 8
6. CAN communication lineAT- 1 0 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Front brake (brake band)AT- 3 0 19. Input clutchAT- 3 2 7
10. High and low reverse clutchAT- 3 3 9
62Engine brake does
not work M2 → M1.ON vehicle1. PNP switchAT- 11 3
2. A/T fluid level and stateAT- 5 3
3. A/T positionAT- 2 2 7
4. Manual mode switchAT- 1 6 7
5. ATF pressure switch 5AT- 1 7 6
6. CAN communication lineAT- 1 0 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Input clutchAT- 3 2 79. High and low reverse clutchAT- 3 3 9
10. Direct clutchAT- 3 4 1
63 Maximum speed low.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Line pressure testAT- 5 5
3. Accelerator pedal position sensorAT- 1 3 2
4. CAN communication lineAT- 1 0 5
5. Direct clutch solenoid valveAT- 1 5 5
6. Control valve with TCMAT- 2 3 6
OFF vehicle7. Torque converter AT- 3 0 1
8. Oil pump assemblyAT- 3 2 2
9. Input clutchAT- 3 2 7
10. Gear systemAT- 2 8 1
11. High and low reverse clutchAT- 3 3 9
12. Direct clutchAT- 3 4 1
13. 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
14. 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

AT-130
DTC P0745 LINE PRESSURE SOLENOID VALVE
Revision: 2007 April2007 M35/M45
DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionNCS001M3
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
CONSULT-II Reference ValueNCS001M4
On Board Diagnosis LogicNCS001M5

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-II or 4th judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–When TCM detects as irregular by comparing target value with monitor value.
Possible CauseNCS001M6

Harness or connectors
(Solenoid circuit is open or shorted.)

Line pressure solenoid valve
DTC Confirmation ProcedureNCS001M7
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
3. Touch “START”.
4. Engine start and wait for at least 5 seconds.
5. If DTC is detected, go to AT- 1 3 1 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
LINE PRES SOL During driving 0.2 - 0.6 A
BCIA0030E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-193
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2007 April2007 M35/M45
Large Shock (“N” to “D” Position)NCS001Q3
SYMPTOM:
A noticeable shock occurs when the selector lever is shifted from “N” to “D” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 2 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Is any malfunction detected by self-diagnostic results?
YES >> Check malfunctioning system. Refer to AT- 9 2 , "SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 4 ,
"Judgement Self-diagnosis Code" .
NO >> GO TO 2.
2. ENGINE IDLE SPEED
Check engine idle speed. Refer to EC-83, "
Idle Speed and Ignition Timing Check" (for VQ35DE engine), EC-
785, "Idle Speed and Ignition Timing Check" (for VK45DE engine).
OK or NG
OK >> GO TO 3.
NG >> Adjust engine idle speed. Refer to EC-83, "
Idle Speed and Ignition Timing Check" (for VQ35DE
engine), EC-785, "
Idle Speed and Ignition Timing Check" (for VK45DE engine).
3. CHECK A/T POSITION
Check A/T position. Refer to AT- 2 2 8 , "
Checking of A/T Position" .
OK or NG
OK >> GO TO 4.
NG >> Adjust A/T position. Refer to AT- 2 2 7 , "
Adjustment of A/T Position" .
4. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer to AT- 5 5 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
6. DETECT MALFUNCTIONING
1. Check control valve with TCM. Refer to AT- 2 3 6 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 3 0 1 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 2 2 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.