2005 INFINITI FX35 low oil pressure

AT-76
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
32
Slips/Will
Not
Engage When pressing the
accelerator pedal and
shifting speed D4 →
D
3 or M4 → M3 the
engine idles or the
transmission slips. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 4 3
3. ATF pressure switch 3 and input clutch solenoid valve AT- 1 7 7,
AT- 1 5 0
4. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 5,
AT- 1 5 4
5. CAN communication line AT- 1 0 6
6. Line pressure test AT- 5 4
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Torque converter
AT- 2 9 0
9. Oil pump assemblyAT- 3 0 8
10. 3rd one-way clutch AT- 3 11
11. Gear systemAT- 2 7 8
12. High and low reverse clutchAT- 3 2 3
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-18, "
Cross-Sectional View (2WD Models)" or AT-19,
"Cross-Sectional View (AWD Models)" ) AT- 2 9 0
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT- 1 9 , "Cross-
Sectional View (AWD Models)" ) AT- 2 9 0
33 When pressing the
accelerator pedal and
shifting speed D3 →
D
2 or M3 → M2 the
engine idles or the
transmission slips. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 4 3
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT- 1 8 1,
AT- 1 6 2
4. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 9,
AT- 1 5 8
5. CAN communication line AT- 1 0 6
6. Line pressure test AT- 5 4
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Torque converter
AT- 2 9 0
9. Oil pump assemblyAT- 3 0 8
10. 3rd one-way clutch AT- 3 11
11. Gear systemAT- 2 7 8
12. Direct clutchAT- 3 2 6
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT- 1 9 , "Cross-
Sectional View (AWD Models)" ) AT- 2 9 0
No. Items Symptom Condition Diagnostic Item
Reference
page

AT-78
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
36
Slips/Will
Not
Engage With selector lever in
“R” position, accelera-
tion is extremely poor. ON vehicle 1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT- 1 3 3
4. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT- 1 8 1,
AT- 1 6 2
5. CAN communication line AT- 1 0 6
6. PNP switch AT- 11 4
7. Control linkage adjustmentAT- 2 3 5
8. Control valve with TCMAT- 2 4 3
OFF vehicle 9. Gear system
AT- 2 7 810. Output shaft AT- 2 9 0
11. Reverse brakeAT- 2 9 0
37 While starting off by
accelerating in 1st,
engine races or slip-
page occurs. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT- 1 3 3
4. CAN communication lineAT- 1 0 6
5. Control valve with TCMAT- 2 4 3
OFF vehicle 6. Torque converter
AT- 2 9 0
7. Oil pump assemblyAT- 3 0 8
8. 3rd one-way clutch AT- 3 11
9. 1st one-way clutchAT- 3 1 8
10. Gear systemAT- 2 7 8
11. Reverse brakeAT- 2 9 0
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-18, "
Cross-Sectional View (2WD Models)" or AT-19,
"Cross-Sectional View (AWD Models)" ) AT- 2 9 0
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT- 1 9 , "Cross-
Sectional View (AWD Models)" ) AT- 2 9 0
No. Items Symptom Condition Diagnostic Item
Reference
page

TROUBLE DIAGNOSIS AT-79
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
38
Slips/Will
Not
Engage While accelerating in
2nd, engine races or
slippage occurs. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT-133
4. CAN communication lineAT-106
5. ATF pressure switch 5 and direct clutch solenoid valve AT-179,
AT-158
6. Control valve with TCM AT-243
OFF vehicle 7. Torque converter
AT-290
8. Oil pump assemblyAT-308
9. 3rd one-way clutch AT- 3 11
10. Gear systemAT-278
11. Direct clutchAT-326
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT-19, "Cross-
Sectional View (AWD Models)" ) AT-290
39
While accelerating in
3rd, engine races or
slippage occurs. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT-133
4. CAN communication lineAT-106
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-181,
AT-162

6. Control valve with TCM AT-243
OFF vehicle 7. Torque converter
AT-290
8. Oil pump assemblyAT-308
9. 3rd one-way clutch AT- 3 11
10. Gear systemAT-278
11. High and low reverse clutchAT-323
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 8 , "
Cross-Sectional View (2WD Models)" or AT- 1 9 ,
"Cross-Sectional View (AWD Models)" ) AT-290
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT-19, "Cross-
Sectional View (AWD Models)" ) AT-290
No. Items Symptom Condition Diagnostic Item
Reference
page

AT-80
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
40
Slips/Will
Not
Engage While accelerating in
4th, engine races or
slippage occurs. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT- 1 3 3
4. CAN communication lineAT- 1 0 6
5. ATF pressure switch 3 and input clutch solenoid valve AT- 1 7 7,
AT- 1 5 0
6. Control valve with TCM AT- 2 4 3
OFF vehicle 7. Torque converter
AT- 2 9 0
8. Oil pump assemblyAT- 3 0 8
9. Input clutchAT- 3 1 3
10. Gear systemAT- 2 7 8
11. High and low reverse clutchAT- 3 2 3
12. Direct clutchAT- 3 2 6
41 While accelerating in
5th, engine races or
slippage occurs. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT- 1 3 3
4. CAN communication lineAT- 1 0 6
5. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 5,
AT- 1 5 4
6. Control valve with TCM AT- 2 4 3
OFF vehicle 7. Torque converter
AT- 2 9 0
8. Oil pump assembly AT- 3 0 8
9. Front brake (brake band)AT- 2 9 0
10. Input clutchAT- 3 1 3
11. Gear systemAT- 2 7 8
12. High and low reverse clutchAT- 3 2 3
42 Slips at lock-up. ON vehicle 1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Engine speed signalAT- 1 2 3
4. Turbine revolution sensorAT- 1 4 1
5. Torque converter clutch solenoid valveAT- 1 2 5
6. CAN communication lineAT- 1 0 6
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Torque converter
AT- 2 9 09. Oil pump assemblyAT- 3 0 8
No. Items Symptom Condition Diagnostic Item Reference
page

TROUBLE DIAGNOSIS AT-85
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX57
Others Strange noise in “D”
position. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Engine speed signalAT-123
3. CAN communication lineAT-106
4. Control valve with TCMAT-243
OFF vehicle 5. Torque converter
AT-290
6. Oil pump assemblyAT-308
7. Gear systemAT-278
8. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT-19, "Cross-
Sectional View (AWD Models)" ) AT-290
58 Vehicle does not
decelerate by engine
brake.
Refer to AT-231,
"Vehicle Does Not
Decelerate by Engine
Brake" . ON vehicle
1. PNP switch
AT- 11 4
2. A/T fluid level and state AT- 5 2
3. Control linkage adjustmentAT-235
4. Manual mode switchAT-170
5. ATF pressure switch 5AT-179
6. CAN communication lineAT-106
7. Control valve with TCMAT-243
OFF vehicle 8. Input clutch
AT-3139. High and low reverse clutchAT-323
10. Direct clutchAT-326
59 Engine brake does
not work M5 → M4. ON vehicle 1. PNP switch
AT- 11 4
2. A/T fluid level and state AT- 5 2
3. Control linkage adjustmentAT-235
4. Manual mode switchAT-170
5. ATF pressure switch 1AT-175
6. CAN communication lineAT-106
7. Control valve with TCMAT-243
OFF vehicle 8. Front brake (brake band) AT-290
60 Engine brake does
not work M4 → M3. ON vehicle 1. PNP switch
AT- 11 4
2. A/T fluid level and state AT- 5 2
3. Control linkage adjustmentAT-235
4. Manual mode switchAT-170
5. ATF pressure switch 1 and ATF pressure switch 3 AT-175,
AT-177
6. CAN communication line AT-106
7. Control valve with TCMAT-243
OFF vehicle 8. Front brake (brake band)
AT-2909. Input clutchAT-313
No. Items Symptom Condition Diagnostic Item Reference
page

AT-86
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
61
Others Engine brake does
not work M3 → M2. ON vehicle 1. PNP switch
AT- 11 4
2. A/T fluid level and state AT- 5 2
3. Control linkage adjustmentAT- 2 3 5
4. Manual mode switchAT- 1 7 0
5. ATF pressure switch 6AT- 1 8 1
6. CAN communication lineAT- 1 0 6
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Front brake (brake band)
AT- 2 9 09. Input clutchAT- 3 1 3
10. High and low reverse clutchAT- 3 2 3
62 Engine brake does
not work M2 → M1. ON vehicle 1. PNP switch
AT- 11 4
2. A/T fluid level and state AT- 5 2
3. Control linkage adjustmentAT- 2 3 5
4. Manual mode switchAT- 1 7 0
5. ATF pressure switch 5AT- 1 7 9
6. CAN communication lineAT- 1 0 6
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Input clutch
AT- 3 1 39. High and low reverse clutchAT- 3 2 3
10. Direct clutchAT- 3 2 6
63 Maximum speed low. ON vehicle
1. A/T fluid level and state
AT- 5 2
2. Line pressure testAT- 5 4
3. Accelerator pedal position sensorAT- 1 3 3
4. CAN communication lineAT- 1 0 6
5. Direct clutch solenoid valveAT- 1 5 8
6. Control valve with TCMAT- 2 4 3
OFF vehicle 7. Torque converter
AT- 2 9 0
8. Oil pump assemblyAT- 3 0 8
9. Input clutchAT- 3 1 3
10. Gear systemAT- 2 7 8
11. High and low reverse clutchAT- 3 2 3
12. Direct clutchAT- 3 2 6
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-18, "
Cross-Sectional View (2WD Models)" or AT-19,
"Cross-Sectional View (AWD Models)" ) AT- 2 9 0
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-18,
"Cross-Sectional View (2WD Models)" or AT- 1 9 , "Cross-
Sectional View (AWD Models)" ) AT- 2 9 0
No. Items Symptom Condition Diagnostic Item
Reference
page

DTC P0745 LINE PRESSURE SOLENOID VALVE AT-129
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionACS002NB
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 ValueACS003KU
On Board Diagnosis LogicACS002NC

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 CauseACS002ND

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

Line pressure solenoid valve
DTC Confirmation ProcedureACS002NE
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. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Engine start and wait at least 5 seconds.
5. If DTC is detected, go to “ AT- 1 3 0 , "
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
BCIA0031E

AT-198
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2005 July 2005 FX
4. CHECK A/T FLUID LEVEL
Check the 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 4 , "
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 ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
–Power train system. Refer to AT- 2 9 0 , "DISASSEMBLY" .
–Transmission case. Refer to AT- 2 9 0 , "DISASSEMBLY" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT638A
SAT494G