TROUBLE DIAGNOSIS
AT-51
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 November2007 350Z
3. After warming up remove the oil pressure detection plug and
install the oil pressure gauge [ST2505S001(J-34301-C)].
CAUTION:
When using the oil pressure gauge, be sure to use O- ring
attached to the oil pressure detection plug.
4. Securely engage the parking brake so that the tires do not turn.
5. Start the engine, then measure the line pressure at both idle and
the stall speed.
CAUTION:
Keep brake pedal pressed all the way down during mea-
surement.
When measuring the line pressure at the stall speed,
refer to AT- 4 9 , "
STALL TEST" .
6. After the measurements are complete, install the oil pressure
detection plug and tighten to the specified torque. Refer to AT-
246, "Components" .
CAUTION:
Do not reuse O-ring.
Apply ATF to O-ring.
Line Pressure
SCIA5309E
SAT513G
SAT493G
Engine speedLine pressure kPa (kg/cm2 , psi)
“R” position “D” and “M” positions
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)
TROUBLE DIAGNOSIS
AT-61
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 November2007 350Z
7
Shift
ShockShock is too large for
upshift when acceler-
ator pedal is released.ON vehicle1. Accelerator pedal position sensorAT-131
2. A/T positionAT-206
3. Engine speed signalAT- 11 3
4. CAN communication lineAT- 9 4
5. Turbine revolution sensorAT-106
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
7. A/T fluid level and stateAT- 4 9
8. Control valve with TCMAT-215
OFF vehicle9. Front brake (brake band)AT-25510. Input clutchAT-276
11. High and low reverse clutchAT-286
12. Direct clutchAT-288
8Shock is too large for
lock-up.ON vehicle1. Accelerator pedal position sensorAT-131
2. A/T positionAT-206
3. Engine speed signalAT- 11 3
4. CAN communication lineAT- 9 4
5. Turbine revolution sensorAT-106
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
7. Torque converter clutch solenoid valveAT-125
8. A/T fluid level and stateAT- 4 9
9. Control valve with TCMAT-215
OFF vehicle 10. Torque converterAT-255
9Shock is too large
during engine brake.ON vehicle1. Accelerator pedal position sensorAT-131
2. A/T positionAT-206
3. CAN communication lineAT- 9 4
4. A/T fluid level and stateAT- 4 9
5. Control valve with TCMAT-215
OFF vehicle6. Front brake (brake band)AT-2557. Input clutchAT-276
8. High and low reverse clutchAT-286
9. Direct clutchAT-288
No. Items Symptom Condition Diagnostic ItemReference
page
AT-66
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
23
Slips/Will
Not
EngageVehicle cannot be
started from D
1 .
Refer to AT-181,
"Vehicle Cannot Be
Started from D1" .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Accelerator pedal position sensorAT- 1 3 1
3. Line pressure testAT- 5 0
4. CAN communication lineAT- 9 4
5. Control valve with TCMAT- 2 1 5
OFF vehicle6. Torque converterAT- 2 5 5
7. Oil pump assemblyAT- 2 7 1
8. 3rd one-way clutchAT- 2 7 4
9. 1st one-way clutchAT- 2 8 1
10. Gear systemAT- 2 4 6
11. Reverse brakeAT- 2 5 5
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-sectional View" .)AT- 2 5 5
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT- 2 5 5
24Does not lock-up.
Refer to AT-191, "A/T
Does Not Lock-up" .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Line pressure testAT- 5 0
3. Engine speed signalAT- 11 3
4. Turbine revolution sensorAT- 1 0 6
5. Torque converter clutch solenoid valveAT- 1 2 5
6. CAN communication lineAT- 9 4
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Torque converterAT- 2 5 59. Oil pump assemblyAT- 2 7 1
25Does not hold lock-up
condition.
Refer to AT-193, "A/T
Does Not Hold Lock-
up Condition" .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Line pressure testAT- 5 0
3. Engine speed signalAT- 11 3
4. Turbine revolution sensorAT- 1 0 6
5. Torque converter clutch solenoid valveAT- 1 2 5
6. CAN communication lineAT- 9 4
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Torque converterAT- 2 5 59. Oil pump assemblyAT- 2 7 1
No. Items Symptom Condition Diagnostic ItemReference
page
TROUBLE DIAGNOSIS
AT-67
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 November2007 350Z26
Slips/Will
Not
EngageLock-up is not
released.
Refer to AT-194,
"Lock-up Is Not
Released" .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Line pressure testAT- 5 0
3. Engine speed signalAT- 11 3
4. Turbine revolution sensorAT-106
5. Torque converter clutch solenoid valveAT-125
6. CAN communication lineAT- 9 4
7. Control valve with TCMAT-215
OFF vehicle8. Torque converterAT-2559. Oil pump assemblyAT-271
27No shock at all or the
clutch slips when
vehicle changes
speed D
1 → D2 or
M
1 → M2 . ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
3. Direct clutch solenoid valveAT-149
4. CAN communication lineAT- 9 4
5. Line pressure testAT- 5 0
6. Control valve with TCMAT-215
OFF vehicle7. Torque converterAT-255
8. Oil pump assemblyAT-271
9. 3rd one-way clutchAT-274
10. Gear systemAT-246
11. Direct clutchAT-288
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT-255
No. Items Symptom Condition Diagnostic ItemReference
page
AT-68
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
28
Slips/Will
Not
EngageNo shock at all or the
clutch slips when
vehicle changes
speed D
2 → D3 or
M
2 → M3 .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 9
3. High and low reverse clutch solenoid valveAT- 1 5 1
4. CAN communication lineAT- 9 4
5. Line pressure testAT- 5 0
6. Control valve with TCMAT- 2 1 5
OFF vehicle7. Torque converterAT- 2 5 5
8. Oil pump assemblyAT- 2 7 1
9. 3rd one-way clutchAT- 2 7 4
10. Gear systemAT- 2 4 6
11. High and low reverse clutchAT- 2 8 6
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-sectional View" .)AT- 2 5 5
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT- 2 5 5
29No shock at all or the
clutch slips when
vehicle changes
speed D
3 → D4 or
M
3 → M4 .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 9
3. Input clutch solenoid valveAT- 1 4 5
4. Front brake solenoid valveAT- 1 4 7
5. CAN communication lineAT- 9 4
6. Line pressure testAT- 5 0
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Torque converterAT- 2 5 5
9. Oil pump assemblyAT- 2 7 1
10. Input clutchAT- 2 7 6
11. Gear systemAT- 2 4 6
12. High and low reverse clutchAT- 2 8 6
13. Direct clutchAT- 2 8 8
No. Items Symptom Condition Diagnostic ItemReference
page
TROUBLE DIAGNOSIS
AT-69
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 November2007 350Z
30
Slips/Will
Not
EngageNo shock at all or the
clutch slips when
vehicle changes
speed D
4 → D5 or
M
4 → M5 .ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
3. Front brake solenoid valveAT-147
4. Direct clutch solenoid valveAT-149
5. CAN communication lineAT- 9 4
6. Line pressure testAT- 5 0
7. Control valve with TCMAT-215
OFF vehicle8. Torque converterAT-255
9. Oil pump assemblyAT-271
10. Front brake (brake band)AT-255
11. Input clutchAT-276
12. Gear systemAT-246
13. High and low reverse clutchAT-286
31When you press the
accelerator pedal and
shift speed D5 → D4
or M
5 → M4 the
engine idles or the A/
T slips.ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
3. Front brake solenoid valveAT-147
4. Direct clutch solenoid valveAT-149
5. CAN communication lineAT- 9 4
6. Line pressure testAT- 5 0
7. Control valve with TCMAT-215
OFF vehicle8. Torque converterAT-255
9. Oil pump assemblyAT-271
10. Input clutchAT-276
11. Gear systemAT-246
12. High and low reverse clutchAT-286
13. Direct clutchAT-288
No. Items Symptom Condition Diagnostic ItemReference
page
AT-70
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
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- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 9
3. Input clutch solenoid valveAT- 1 4 5
4. Front brake solenoid valveAT- 1 4 7
5. CAN communication lineAT- 9 4
6. Line pressure testAT- 5 0
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Torque converter AT- 2 5 5
9. Oil pump assemblyAT- 2 7 1
10. 3rd one-way clutchAT- 2 7 4
11. Gear systemAT- 2 4 6
12. High and low reverse clutchAT- 2 8 6
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-sectional View" .)AT- 2 5 5
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT- 2 5 5
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- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 9
3. High and low reverse clutch solenoid valveAT- 1 5 1
4. Direct clutch solenoid valveAT- 1 4 9
5. CAN communication lineAT- 9 4
6. Line pressure testAT- 5 0
7. Control valve with TCMAT- 2 1 5
OFF vehicle8. Torque converterAT- 2 5 5
9. Oil pump assemblyAT- 2 7 1
10. 3rd one-way clutchAT- 2 7 4
11. Gear systemAT- 2 4 6
12. Direct clutchAT- 2 8 8
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT- 2 5 5
No. Items Symptom Condition Diagnostic ItemReference
page
TROUBLE DIAGNOSIS
AT-71
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 November2007 350Z
34
Slips/Will
Not
EngageWhen you press the
accelerator pedal and
shift speed D2 → D1
or M
2 → M1 the
engine idles or the A/
T slips.ON vehicle1. A/T fluid level and stateAT- 4 9
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT-108,
AT-139
3. Direct clutch solenoid valveAT-149
4. CAN communication lineAT- 9 4
5. Line pressure testAT- 5 0
6. Control valve with TCMAT-215
OFF vehicle7. Torque converterAT-255
8. Oil pump assemblyAT-271
9. 3rd one-way clutchAT-274
10. 1st one-way clutchAT-281
11. Gear systemAT-246
12. Reverse brakeAT-255
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7 , "
Cross-sectional View" .)AT-255
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT-255
35With selector lever in
“D” position, accelera-
tion is extremely poor.ON vehicle1. A/T fluid level and stateAT- 4 9
2. Line pressure testAT- 5 0
3. Accelerator pedal position sensorAT-131
4. CAN communication lineAT- 9 4
5. PNP switchAT-102
6. A/T positionAT-206
7. Control valve with TCMAT-215
OFF vehicle8. Torque converterAT-255
9. Oil pump assemblyAT-271
10. 1st one-way clutchAT-281
11. Gear systemAT-246
12. Reverse brakeAT-255
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7 , "
Cross-sectional View" .)AT-255
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-sectional View" .)AT-255
No. Items Symptom Condition Diagnostic ItemReference
page