Infiniti I35 (A33). Manual — part 23
Items
Symptom
Condition
Diagnostic Item
Reference Page
Improper Shift
Timing
Too high a
change point from
D
4
to D
3
, from D
3
to D
2
, from D
2
to
D
1
.
ON vehicle
1. Accelerator pedal position sensor
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
Kickdown does
not operate when
depressing pedal
in D
4
within kick-
down vehicle
speed.
ON vehicle
1. Accelerator pedal position sensor
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
3. Shift solenoid valve A
4. Shift solenoid valve B
Kickdown oper-
ates or engine
overruns when
depressing pedal
in D
4
beyond kick-
down vehicle
speed limit.
ON vehicle
1. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
2. Accelerator pedal position sensor
3. Shift solenoid valve A
4. Shift solenoid valve B
Gear change from
2
2
to 2
3
in 2nd
position.
ON vehicle
1. Park/neutral position (PNP) switch
2. Control cable adjustment
Gear change from
1
1
to 1
2
in 1st
position.
ON vehicle
1. Park/neutral position (PNP) switch
adjustment
2. Control cable adjustment
No Down Shift
Failure to change
gear from D
4
to
D
3
.
ON vehicle
1. Fluid level
2. Accelerator pedal position sensor
3. Overrun clutch solenoid valve
4. Shift solenoid valve A
5. Line pressure solenoid valve
6. Control valve assembly
OFF vehicle
7. Brake band
8. Overrun clutch
Failure to change
gear from D
3
to
D
2
or from D
4
to
D
2
.
ON vehicle
1. Fluid level
2. Accelerator pedal position sensor
3. Shift solenoid valve A
4. Shift solenoid valve B
5. Control valve assembly
OFF vehicle
6. High clutch
7. Brake band
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-89
Items
Symptom
Condition
Diagnostic Item
Reference Page
No Down Shift
Failure to change
gear from D
2
to
D
1
or from D
3
to
D
1
.
ON vehicle
1. Fluid level
2. Accelerator pedal position sensor
3. Shift solenoid valve A
4. Shift solenoid valve B
5. Control valve assembly
OFF vehicle
6. Low one-way clutch
7. High clutch
8. Brake band
Failure to change
from D
3
to 2
2
when changing
lever into 2nd
position.
AT-254
ON vehicle
1. Accelerator pedal position sensor
2. Shift solenoid valve B
3. Control valve assembly
4. Control cable adjustment
OFF vehicle
5. Brake band
Does not change
from 1
2
to 1
1
in
1st position.
ON vehicle
1. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
2. Shift solenoid valve A
3. Control valve assembly
OFF vehicle
4. Low one-way clutch
5. Brake band
6. Low & reverse brake
No Up Shift
Failure to change
gear from D
1
to
D
2
.
ON vehicle
1. Control cable adjustment
2. Shift solenoid valve A
3. Control valve assembly
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
5. Accelerator pedal position sensor
OFF vehicle
6. Brake band
Failure to change
gear from D
2
to
D
3
.
ON vehicle
1. Control cable adjustment
2. Shift solenoid valve B
3. Control valve assembly
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
5. Accelerator pedal position sensor
OFF vehicle
6. High clutch
7. Brake band
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-90
Items
Symptom
Condition
Diagnostic Item
Reference Page
No Up Shift
Failure to change
gear from D
3
to
D
4
.
ON vehicle
1. Park/neutral position (PNP) switch
2. 3rd position switch
3. Control cable adjustment
4. Shift solenoid valve A
5. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
6. A/T fluid temperature sensor
7. Accelerator pedal position sensor
OFF vehicle
8. Brake band
A/T does not shift
to D
4
when driv-
ing with selector
lever from 3rd to
D position.
ON vehicle
1. Accelerator pedal position sensor
2. Park/neutral position (PNP) switch
3. 3rd position switch
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
5. Shift solenoid valve A
6. Overrun clutch solenoid valve
7. Control valve assembly
8. A/T fluid temperature sensor
9. Line pressure solenoid valve
OFF vehicle
10. Brake band
11. Overrun clutch
Slips/Will Not
Engage
Vehicle will not
run in R position
(but runs in D,
2nd and 1st posi-
tions). Clutch
slips.
Very poor accel-
eration.
AT-231
ON vehicle
1. Control cable adjustment
2. Stall test
3. Line pressure test
4. Line pressure solenoid valve
5. Control valve assembly
OFF vehicle
6. Reverse clutch
7. High clutch
8. Forward clutch
9. Overrun clutch
10. Low & reverse brake
Vehicle will not
run in D and 2nd
positions (but
runs in 1st and R
positions).
ON vehicle
1. Control cable adjustment
OFF vehicle
2. Low one-way clutch
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-91
Items
Symptom
Condition
Diagnostic Item
Reference Page
Slips/Will Not
Engage
Vehicle will not
run in D, 1st, 2nd
positions (but
runs in R posi-
tion). Clutch slips.
Very poor accel-
eration.
AT-234
ON vehicle
1. Fluid level
2. Stall test
3. Line pressure test
4. Line pressure solenoid valve
5. Control valve assembly
6. Accumulator N-D
OFF vehicle
7. Reverse clutch
8. High clutch
9. Forward clutch
10. Forward one-way clutch
11. Low one-way clutch
Clutches or
brakes slip some-
what in starting.
ON vehicle
1. Fluid level
2. Control cable adjustment
3. Accelerator pedal position sensor
4. Line pressure test
5. Line pressure solenoid valve
6. Control valve assembly
7. Accumulator N-D
8. Shift solenoid valve A
9. Shift solenoid valve B
10. Overrun clutch solenoid valve
11. Torque converter clutch solenoid valve
OFF vehicle
12. Forward clutch
13. Reverse clutch
14. Low & reverse brake
15. Oil pump
16. Torque converter
ON vehicle
1. Fluid level
2. Line pressure test
3. Control valve assembly
OFF vehicle
4. Forward clutch
5. Oil pump
6. Torque converter
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-92
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