Infiniti QX56 (JA60). Manual — part 959
TM-138
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
48
Others
Shift point is low in “D”
position.
ON vehicle
1. Output speed sensor and vehicle speed signal
,
2. Accelerator pedal position sensor
3. CAN communication line
4. Control valve with TCM
49
Judder occurs during
lock-up.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. Input speed sensor
4. Output speed sensor and vehicle speed signal
,
5. Accelerator pedal position sensor
6. CAN communication line
7. Torque converter clutch solenoid valve
8. Control valve with TCM
OFF vehicle
9. Torque converter
50
Strange noise in “R”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve with TCM
OFF vehicle
5. Torque converter
6. Oil pump assembly
7. Gear system
8. High and low reverse clutch
9. Reverse brake
51
Strange noise in “N”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve with TCM
OFF vehicle
5. Torque converter
6. Oil pump assembly
7. Gear system
52
Strange noise in “D”
position.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. CAN communication line
4. Control valve with TCM
OFF vehicle
5. Torque converter
6. Oil pump assembly
7. Gear system
8. Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to
.
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
SYSTEM SYMPTOM
TM-139
< SYMPTOM DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
53
Others
Vehicle dose not de-
celerate by engine
brake.
ON vehicle
1. Transmission range switch
2. Fluid level and state
3. Control cable adjustment
4. 1st position switch
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Input clutch
8. High and low reverse clutch
9. Direct clutch
54
Engine brake does not
operate in “2” position.
ON vehicle
1. Transmission range switch
2. Fluid level and state
3. Control cable adjustment
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Front brake (brake band)
8. Input clutch
9. High and low reverse clutch
55
Engine brake does not
operate in “1” position.
ON vehicle
1. Transmission range switch
2. Fluid level and state
3. Control cable adjustment
4. 1st position switch
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Input clutch
8. High and low reverse clutch
9. Direct clutch
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
TM-140
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
56
Others
Maximum speed low.
ON vehicle
1. Fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. Direct clutch solenoid valve
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. Input clutch
10. Gear system
11. High and low reverse clutch
12. Direct clutch
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
14 Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to
.
57
Extremely large creep.
ON vehicle
1. Engine idle speed
2. CAN communication line
OFF vehicle
3. Torque converter
58
With selector lever in
“P” position, vehicle
does not enter parking
condition or, with se-
lector lever in another
position, parking con-
dition is not cancelled.
ON vehicle
1. Transmission range switch
2. Control cable adjustment
OFF vehicle
3. Parking pawl components
59
Vehicle runs with
transmission in “P” po-
sition.
ON vehicle
1. Transmission range switch
2. Fluid level and state
3. Control cable adjustment
4. Control valve with TCM
5. Parking pawl components
OFF vehicle
6. Gear system
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
SYSTEM SYMPTOM
TM-141
< SYMPTOM DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
60
Others
Vehicle runs with
transmission in “N” po-
sition.
ON vehicle
1. Transmission range switch
2. Fluid level and state
3. Control cable adjustment
4. Control valve with TCM
OFF vehicle
5. Input clutch
6. Gear system
7. Direct clutch
8. Reverse brake
9. Forward one- way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to
.
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
61
Engine does not start
in “N” or “P” position.
ON vehicle
1. Ignition switch and starter
2. Control cable adjustment
3. Transmission range switch
62
Engine starts in posi-
tions other than “N” or
“P”.
ON vehicle
1. Ignition switch and starter
2. Control cable adjustment
3. Transmission range switch
63
Engine stall.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. Input speed sensor
4. Torque converter clutch solenoid valve
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Torque converter
64
Engine stalls when se-
lect lever shifted “N”
→
“D”, “R”.
ON vehicle
1. Fluid level and state
2. Engine speed signal
3. Input speed sensor
4. Torque converter clutch solenoid valve
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Torque converter
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
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