Infiniti QX56 (JA60). Manual — part 955
TM-122
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
4
Shift
Shock
Shock is too large
when changing D
3
→
D
4
.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. Input clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Input speed sensor
7. Output speed sensor and vehicle speed signal
,
8. Fluid level and state
9. Control valve with TCM
OFF vehicle
10. Input clutch
5
Shock is too large
when changing D
4
→
D
5
.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. Front brake solenoid valve
4. CAN communication line
5. Engine speed signal
6. Input speed sensor
7. Output speed sensor and vehicle speed signal
,
8. Fluid level and state
9. Control valve with TCM
OFF vehicle
10. Front brake (brake band)
11. Input clutch
6
Shock is too large for
downshift when accel-
erator pedal is
pressed.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. CAN communication line
4. Engine speed signal
5. Input speed sensor
6. Output speed sensor and vehicle speed signal
,
7. Fluid level and state
8. Control valve with TCM
OFF vehicle
9. Front brake (brake band)
10. Input clutch
11. High and low reverse clutch
12. Direct clutch
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
SYSTEM SYMPTOM
TM-123
< SYMPTOM DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
7
Shift
Shock
Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. Engine speed signal
4. CAN communication line
5. Input speed sensorInput speed sensor
6. Output speed sensor and vehicle speed signal
7. Fluid level and state
8. Control valve with TCM
OFF vehicle
9. Front brake (brake band)
10. Input clutch
11. High and low reverse clutch
12. Direct clutch
8
Shock is too large for
lock-up.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. Engine speed signal
4. CAN communication line
5. Input speed sensor
6. Output speed sensor and vehicle speed signal
7. Torque converter clutch solenoid valve
8. Fluid level and state
9. Control valve with TCM
OFF vehicle
10. Torque converter
9
Shock is too large dur-
ing engine brake.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. CAN communication line
4. Fluid level and state
5. Control valve with TCM
OFF vehicle
6. Front brake (brake band)
7. Input clutch
8. High and low reverse clutch
9. Direct clutch
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
TM-124
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
10
No Up
Shift
Gear does not change
from D
→ D
2
.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
,
3. Direct clutch solenoid valve
4. Line pressure test
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Direct clutch
11
Gear does not change
from D
→ D
3
.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
,
3. High and low reverse clutch solenoid valve
4. Line pressure test
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. High and low reverse clutch
12
Gear does not change
from D
→ D
4
.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
,
3. Input clutch solenoid valve
4. Front brake solenoid valve
5. Line pressure test
6. CAN communication line
7. Control valve with TCM
OFF vehicle
8. Input clutch
13
Gear does not change
from D
→ D
5
.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
,
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. Input speed sensor
6. Line pressure test
7. CAN communication line
8. Control valve with TCM
OFF vehicle
9. Front brake (brake band)
10. Input clutch
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
SYSTEM SYMPTOM
TM-125
< SYMPTOM DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
14
No Down
Shift
In “D” or "4" range,
does not downshift to
4GR.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. CAN communication line
6. Line pressure test
7. Control valve with TCM
OFF vehicle
8. Front brake (brake band)
9. Input clutch
15
In “D” or "3" range,
does not downshift to
3GR.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
3. Input clutch solenoid valve
4. Front brake solenoid valve
5. CAN communication line
6. Line pressure test
7. Control valve with TCM
OFF vehicle
8. Input clutch
16
In “D” or "2" range,
does not downshift to
2GR.
.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
3. High and low reverse clutch solenoid valve
4. CAN communication line
5. Line pressure test
6. Control valve with TCM
OFF vehicle
7. High and low reverse clutch
17
In “D” or "1" range,
does not downshift to
1GR.
ON vehicle
1. Fluid level and state
2. Output speed sensor and vehicle speed signal
3. Direct clutch solenoid valve
4. CAN communication line
5. Line pressure test
6. Control valve with TCM
OFF vehicle
7. Direct clutch
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
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