Infiniti F50. Manual — part 47
TROUBLE DIAGNOSIS
AT-73
D
E
F
G
H
I
J
K
L
M
A
B
AT
When you press
the accelerator
pedal and shift
speed D
4
→
D
3
or
M
4
→
M
3
the
engine idles or the
transmission slips.
ON vehicle
1. Fluid level and state
2. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
3. ATF pressure switch 3 and input clutch solenoid valve
4. ATF pressure switch 1 and front brake solenoid valve
5. CAN communication line
6. Line pressure test
7. Control valve assembly
OFF vehicle
8. Torque converter (ATF condition “NG” only. Refer to
9. Oil pump assembly (ATF condition “NG” only. Refer to
.)
10. 3rd one-way clutch (ATF condition “NG” only. Refer to
.)
11. Gear system (ATF condition “NG” only. Refer to
.)
12. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
13. Forward one-way clutch* (ATF condition “NG” only. Refer to
.)
14. Forward brake* (ATF condition “NG” only. Refer to
When you press
the accelerator
pedal and shift
speed D
3
→
D
2
or
M
3
→
M
2
the
engine idles or the
transmission slips.
ON vehicle
1. Fluid level and state
2. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
3. ATF pressure switch 6 and high and low reverse clutch solenoid valve
4. ATF pressure switch 5 and direct clutch solenoid valve
5. CAN communication line
6. Line pressure test
7. Control valve assembly
OFF vehicle
8. Torque converter (ATF condition “NG” only. Refer to
9. Oil pump assembly (ATF condition “NG” only. Refer to
.)
10. 3rd one-way clutch (ATF condition “NG” only. Refer to
.)
11. Gear system (ATF condition “NG” only. Refer to
.)
12. Direct clutch (ATF condition “NG” only. Refer to
.)
13. Forward brake* (ATF condition “NG” only. Refer to
Symptom
Condition
Diagnostic Item
Reference page
AT-74
TROUBLE DIAGNOSIS
When you press
the accelerator
pedal and shift
speed D
2
→
D
1
or
M
2
→
M
1
the
engine idles or the
transmission slips.
ON vehicle
1. Fluid level and state
2. Vehicle speed sensor A/T and vehicle speed sensor MTR
,
3. ATF pressure switch 5 and direct clutch solenoid valve
,
4. CAN communication line
5. Line pressure test
6. Control valve assembly
OFF vehicle
7. Torque converter (ATF condition “NG” only. Refer to
.)
8. Oil pump assembly (ATF condition “NG” only. Refer to
.)
9. 3rd one-way clutch (ATF condition “NG” only. Refer to
.)
10. 1st one-way clutch (ATF condition “NG” only. Refer to
.)
11. Gear system (ATF condition “NG” only. Refer to
12. Reverse brake (ATF condition “NG” only. Refer to
13. Forward one-way clutch* (ATF condition “NG” only. Refer to
14. Forward brake* (ATF condition “NG” only. Refer to
.)
Vehicle dose not
decelerate by
engine brake.
Refer to
"Vehicle Does Not
Decelerate By
Engine Brake"
ON vehicle
1. PNP switch
2. Fluid level and state
3. Control linkage adjustment
4. Manual mode switch
5. ATF pressure switch 5
6. CAN communication line
7. Control valve assembly
OFF vehicle
8. Input clutch (ATF condition “NG” only. Refer to
9. High and low reverse clutch (ATF condition “NG” only. Refer to
10. Direct clutch (ATF condition “NG” only. Refer to
Engine brake does
not work M5
→
M4.
ON vehicle
1. PNP switch
2. Fluid level and state
3. Control linkage adjustment
4. Manual mode switch
5. ATF pressure switch 1
6. CAN communication line
7. Control valve assembly
OFF vehicle
8. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
Symptom
Condition
Diagnostic Item
Reference page
TROUBLE DIAGNOSIS
AT-75
D
E
F
G
H
I
J
K
L
M
A
B
AT
Engine brake does
not work M4
→
M3.
ON vehicle
1. PNP switch
2. Fluid level and state
3. Control linkage adjustment
4. Manual mode switch
5. ATF pressure switch 1 and ATF pressure switch 3
6. CAN communication line
7. Control valve assembly
OFF vehicle
8. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
9. Input clutch (ATF condition “NG” only. Refer to
.)
Engine brake does
not work M3
→
M2.
ON vehicle
1. PNP switch
2. Fluid level and state
3. Control linkage adjustment
4. Manual mode switch
5. ATF pressure switch 6
6. CAN communication line
7. Control valve assembly
OFF vehicle
8. Front brake [brake band (ATF condition “NG” only. Refer to
.)]
9. Input clutch (ATF condition “NG” only. Refer to
.)
10. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
Engine brake does
not work M2
→
M1.
ON vehicle
1. PNP switch
2. Fluid level and state
3. Control linkage adjustment
4. Manual mode switch
5. ATF pressure switch 5
6. CAN communication line
7. Control valve assembly
OFF vehicle
8. Input clutch (ATF condition “NG” only. Refer to
.)
9. High and low reverse clutch (ATF condition “NG” only. Refer to
.)
10. Direct clutch (ATF condition “NG” only. Refer to
.)
Symptom
Condition
Diagnostic Item
Reference page
AT-76
TROUBLE DIAGNOSIS
With selector lever
in D position, accel-
eration is extremely
poor.
ON vehicle
1. Fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. PNP switch
6. Control linkage adjustment
7. Control valve assembly
OFF vehicle
8. Torque converter (ATF condition “NG” only. Refer to
.)
9. Oil pump assembly (ATF condition “NG” only. Refer to
.)
10. 1st one-way clutch (ATF condition “NG” only. Refer to
.)
11. Gear system (ATF condition “NG” only. Refer to
12. Reverse brake (ATF condition “NG” only. Refer to
13. Forward one-way clutch* (ATF condition “NG” only. Refer to
14. Forward brake* (ATF condition “NG” only. Refer to
.)
With selector lever
in R position, accel-
eration is extremely
poor.
ON vehicle
1. Fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. ATF pressure switch 6 and high and low reverse clutch solenoid valve
,
5. CAN communication line
6. PNP switch
7. Control linkage adjustment
8. Control valve assembly
OFF vehicle
9. Gear system (ATF condition “NG” only. Refer to
10. Output shaft (ATF condition “NG” only. Refer to
11. Reverse brake (ATF condition “NG” only. Refer to
Symptom
Condition
Diagnostic Item
Reference page
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