Infiniti F50. Manual — part 44
TROUBLE DIAGNOSIS
AT-61
D
E
F
G
H
I
J
K
L
M
A
B
AT
Large shock. (“N”
→
“ D” position)
Refer to
"Large Shock (“N”
to “D” Position)"
ON vehicle
1. Engine idle speed
2. Engine speed signal
3. Accelerator pedal position sensor
4. Control linkage adjustment
5. ATF temperature sensor
6. ATF pressure switch 1 and front brake solenoid valve
7. CAN communication line
8. Fluid level and state
9. Line pressure test
10. Control valve assembly
OFF vehicle
11. Forward brake* (ATF condition “NG” only. Refer to
Shock is too large
when changing D
1
→
D
2
or M
1
→
M
2
.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. ATF pressure switch 5 and direct clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Turbine revolution sensor
7. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
8. Fluid level and state
9. Control valve assembly
OFF vehicle
10. Direct clutch (ATF condition “NG” only. Refer to
.)
Shock is too large
when changing D
2
→
D
3
or M
2
→
M
3
.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. ATF pressure switch 6 and high and low reverse clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Turbine revolution sensor
7. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
8. Fluid level and state
9. Control valve assembly
OFF vehicle
10. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
Shock is too large
when changing D
3
→
D
4
or M
3
→
M
4
.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. ATF pressure switch 3 and input clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Turbine revolution sensor
7. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
8. Fluid level and state
9. Control valve assembly
OFF vehicle
10. Input clutch (ATF condition “NG” only. Refer to
.)
Symptom
Condition
Diagnostic Item
Reference page
AT-62
TROUBLE DIAGNOSIS
Shock is too large
when changing D
4
→
D
5
or M
4
→
M
5
.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. ATF pressure switch 1 and front brake solenoid valve
,
4. CAN communication line
5. Engine speed signal
6. Turbine revolution sensor
7. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
8. Fluid level and state
9. Control valve assembly
OFF vehicle
10. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
11. Input clutch (ATF condition “NG” only. Refer to
Shock is too large
for downshift when
accelerator pedal is
pressed.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. CAN communication line
4. Engine speed signal
5. Turbine revolution sensor
6. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
7. Fluid level and state
8. Control valve assembly
OFF vehicle
9. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
10. Input clutch (ATF condition “NG” only. Refer to
11. High and low reverse clutch (ATF condition “NG” only. Refer to
12. Direct clutch (ATF condition “NG” only. Refer to
Shock is too large
for upshift when
accelerator pedal is
released.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. Engine speed signal
4. CAN communication line
5. Turbine revolution sensor
6. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
7. Fluid level and state
8. Control valve assembly
OFF vehicle
9. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
10. Input clutch (ATF condition “NG” only. Refer to
11. High and low reverse clutch (ATF condition “NG” only. Refer to
12. Direct clutch (ATF condition “NG” only. Refer to
Symptom
Condition
Diagnostic Item
Reference page
TROUBLE DIAGNOSIS
AT-63
D
E
F
G
H
I
J
K
L
M
A
B
AT
Shock is too large
for lock-up.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. Engine speed signal
4. CAN communication line
5. Turbine revolution sensor
6. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
7. Torque converter clutch solenoid valve
8. Fluid level and state
9. Control valve assembly
OFF vehicle
10. Torque converter (ATF condition “NG” only. Refer to
.)
Shock is too large
during engine
brake.
ON vehicle
1. Accelerator pedal position sensor
2. Control linkage adjustment
3. CAN communication line
4. Fluid level and state
5. Control valve assembly
OFF vehicle
6. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
7. Input clutch (ATF condition “NG” only. Refer to
.)
8. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
9. Direct clutch (ATF condition “NG” only. Refer to
.)
Judder occurs dur-
ing lock-up.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. Turbine revolution sensor
4. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
5. Accelerator pedal position sensor
6. CAN communication line
7. Torque converter clutch solenoid valve
8. Control valve assembly
OFF vehicle
9. Torque converter (ATF condition “NG” only. Refer to
Strange noise in “R”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve assembly
OFF vehicle
5. Torque converter (ATF condition “NG” only. Refer to
6. Oil pump assembly (ATF condition “NG” only. Refer to
.)
7. Gear system (ATF condition “NG” only. Refer to
.)
8. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
9. Reverse brake (ATF condition “NG” only. Refer to
.)
Symptom
Condition
Diagnostic Item
Reference page
AT-64
TROUBLE DIAGNOSIS
Strange noise in “N”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve assembly
OFF vehicle
5. Torque converter (ATF condition “NG” only. Refer to
.)
6. Oil pump assembly (ATF condition “NG” only. Refer to
.)
7. Gear system (ATF condition “NG” only. Refer to
Strange noise in “D”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve assembly
OFF vehicle
5. Torque converter (ATF condition “NG” only. Refer to
.)
6. Oil pump assembly (ATF condition “NG” only. Refer to
.)
7. Gear system (ATF condition “NG” only. Refer to
8. Forward brake* (ATF condition “NG” only. Refer to
When D or M posi-
tion, remains in 1st
gear.
ON vehicle
1. Fluid level and state
2. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
3. Direct clutch solenoid valve
4. Line pressure test
5. CAN communication line
6. Control valve assembly
OFF vehicle
7. 3rd one-way clutch (ATF condition “NG” only. Refer to
.)
8. 1st one-way clutch (ATF condition “NG” only. Refer to
.)
9. Gear system (ATF condition “NG” only. Refer to
10. Reverse brake (ATF condition “NG” only. Refer to
11. Forward one-way clutch* (ATF condition “NG” only. Refer to
12. Forward brake* (ATF condition “NG” only. Refer to
.)
Symptom
Condition
Diagnostic Item
Reference page
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