Nissan Frontier D22. Manual — part 65
TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-229
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
4.
CHECK SHIFT DOWN (D
3
TO D
2
)
1.
Move selector lever from D to 2 position while driving in D
3
(O/D OFF).
2.
Does A/T shift from D
3
(O/D OFF) to 2
2
?
Read gear position.
Yes or No
Yes
>> GO TO 5.
No
>> Go to
AT-386, "18. A/T Does Not Shift: D
5.
CHECK ENGINE BRAKE
Does vehicle decelerate by engine brake?
Yes or No
Yes
>> GO TO 6.
No
>> Go to
AT-382, "15. Engine Speed Does Not Return To
.
6.
CHECK SHIFT DOWN (2
2
TO 1
1
)
1.
Move selector lever from 2 to 1 position while driving in 2
2
.
2.
Does A/T shift from 2
2
to 1
1
position?
Yes or No
Yes
>> GO TO 7.
No
>> Go to
AT-387, "19. A/T Does Not Shift: 2
.
7.
CHECK ENGINE BRAKE
Does vehicle decelerate by engine brake?
Yes or No
Yes
>> 1. Stop vehicle.
2. Perform self-diagnosis. Refer to
DIAGNOSTIC PROCEDURE (NO TOOLS)"
No
AT-387, "20. Vehicle Does Not Decelerate By
SAT791GA
SAT791GA
SAT778B
SAT778B
AT-230
[RE4R01A]
TROUBLE DIAGNOSIS — BASIC INSPECTION
Symptom Chart
ECS007M0
Numbers are arranged in order of inspection.
Perform inspections starting with number one and work up.
Items
Symptom
Condition
Diagnostic Item
Reference Page
VG33E only
VG33ER only
No Lock-up
Engagement/
TCC Inopera-
tive
Torque con-
verter is not
locked up.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
3. Park/neutral position (PNP) switch
adjustment
4. Engine speed signal
5. A/T fluid temperature sensor
6. Line pressure test
7. Torque converter clutch solenoid
valve
8. Control valve assembly
OFF vehicle
9. Torque converter
Torque con-
verter clutch
piston slip.
ON vehicle
1. Fluid level
2. Throttle position sensor (Adjust-
ment)
3. Line pressure test
4. Torque converter clutch solenoid
valve
5. Line pressure solenoid valve
6. Control valve assembly
OFF vehicle
7. Torque converter
Lock-up point
is extremely
high or low.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
3. Torque converter clutch solenoid
valve
4. Control valve assembly
Shift Shock
Sharp shock
in shifting
from N to D
position.
ON vehicle
1. Engine idling rpm
2. Throttle position sensor (Adjust-
ment)
3. Line pressure test
4. A/T fluid temperature sensor
5. Engine speed signal
6. Line pressure solenoid valve
7. Control valve assembly
8. Accumulator N-D
OFF vehicle
9. Turbine revolution sensor
10. Forward Clutch
TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-231
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Shift Shock
Too sharp a
shock in
change from
D
1
to D
2
.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Line pressure test
3. Accumulator servo release
4. Control valve assembly
5. A/T fluid temperature sensor
OFF vehicle
6. Brake band
Too sharp a
shock in
change from
D
2
to D
3
.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Line pressure test
3. Control valve assembly
OFF vehicle
4. High clutch
5. Brake band
Too sharp a
shock in
change from
D
3
to D
4
.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Line pressure test
3. Control valve assembly
OFF vehicle
4. Brake band
5. Overrun clutch
Gear change
shock felt dur-
ing decelera-
tion by
releasing
accelerator
pedal.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Line pressure test
3. Overrun clutch solenoid valve
4. Control valve assembly
Large shock
changing from
1
2
to 1
1
in 1
position.
ON vehicle
1. Control valve assembly
ON vehicle
2. Low & reverse brake
Items
Symptom
Condition
Diagnostic Item
Reference Page
VG33E only
VG33ER only
AT-232
[RE4R01A]
TROUBLE DIAGNOSIS — BASIC INSPECTION
Improper Shift
Timing
Too high a
gear change
point from D
1
to D
2
, from
D
2
to D
3
,
from D
3
to D
4
.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
3. Shift solenoid valve A
4. Shift solenoid valve B
Gear change
directly from
D
1
to D
3
occurs.
ON vehicle
1. Fluid level
2. Accumulator servo release
OFF vehicle
3. Brake band
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. Throttle position sensor (Adjust-
ment)
2. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
Kickdown
does not oper-
ate when
depressing
pedal in D
4
within kick-
down vehicle
speed.
ON vehicle
1. Throttle position sensor (Adjust-
ment)
2. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
3. Shift solenoid valve A
4. Shift solenoid valve B
Improper Shift
Timing
Kickdown
operates or
engine over-
runs when
depressing
pedal in D
4
beyond kick-
down vehicle
speed limit.
ON vehicle
1. Vehicle speed sensor·A/T (Revolu-
tion sensor) and vehicle speed sen-
sor·MTR
2. Throttle position sensor (Adjust-
ment)
3. Shift solenoid valve A
4. Shift solenoid valve B
Gear change
from 2
2
to 2
3
in 2 position.
ON vehicle
1. Park/neutral position (PNP) switch
adjustment
Gear change
from 1
1
to 1
2
in 1 position.
ON vehicle
1. Park/neutral position (PNP) switch
adjustment
2. Manual control linkage adjustment
Items
Symptom
Condition
Diagnostic Item
Reference Page
VG33E only
VG33ER only
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