Nissan Frontier D22. Instruction — part 17

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

AT-37

[RL4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

No engine braking

When overdrive control switch is set
from ON to OFF.

ON VEHICLE

1. Fluid level and fluid quality
2. Control linkage
3. Line pressure
4. Throttle wire
5. Accumulator 2-3
6. Overdrive control switch, overdrive hold
control module (if equipped), overdrive cancel
relay (if equipped), and wiring
7. Overdrive cancel solenoid valve
8. Control valve
* Pressure regulator valve
* Pressure modifier valve
* Throttle valve & detent valve
* Overrun clutch reducing valve

OFF VEHICLE

9. Overrun clutch

When shifting from 2nd to 1st in 1 posi-
tion.

ON VEHICLE

1. Fluid level and fluid quality
2. Control linkage
3. Line pressure
4. Throttle wire
6. Control valve
* Pressure regulator valve
* Pressure modifier valve
* Throttle valve & detent valve
* 1st reducing valve

OFF VEHICLE

7. Overrun clutch
8. Low & reverse clutch

Shift quality

Too low a gear change point from 2nd
to 3rd and from 3rd to 2nd.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 2-3 throttle modifier valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Too high a gear change point from 2nd
to 3rd and from 3rd to 2nd.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 2-3 shift valve
* 2-3 throttle modifier valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Too low a gear change point from 2nd
to 1st in 1 position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* Pressure regulator valve
* Pressure modifier valve
* Throttle valve & detent valve
* 1st reducing valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Symptom

Condition

Diagnostic Item

AT-38

[RL4R01A]

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Shift quality

Too high a gear change point from 2nd
to 1st in 1 position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 1st reducing valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Failure to change gear from 4th to 2nd
with accelerator pedal depressed.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 4-2 relay valve
* 4-2 sequence valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Failure to change gear from 3rd to 2nd
with accelerator pedal depressed.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 3-2 downshift valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Failure to change gear from 1st to 2nd
in D and 2 position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 1-2 shift valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Vehicle does not start from 1st in D
and 2 position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 1-2 shift valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Symptom

Condition

Diagnostic Item

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

AT-39

[RL4R01A]

D

E

F

G

H

I

J

K

L

M

A

B

AT

Shift quality

Failure to change gear to 3rd to 4th in
D position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Overdrive control switch, overdrive hold
control module (if equipped), overdrive cancel
relay (if equipped), and wiring
6. Overdrive cancel solenoid valve
7. Control valve
* 2-3 shift valve
* 3-4 shift valve
8. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Changes gear to 1st directly when
selector lever is set from D to 1 posi-
tion.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 1st reducing valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Changes gear to 2nd in 1 position.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* Pressure regulator valve
* Pressure modifier valve
* Throttle valve & detent valve
* 1st reducing valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Too high or low a change point when
lock-up operates.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* Pressure regulator valve
* Pressure modifier valve
* Throttle valve & detent valve
* Kickdown modifier valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Symptom

Condition

Diagnostic Item

AT-40

[RL4R01A]

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Lock-up quality

Lock-up point is extremely high or low.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 4th speed cut valve
* Pressure regulator valve
* Pressure modifier valve
* Torque converter clutch control valve
* Throttle valve & detent valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

Torque converter does not lock-up.

ON VEHICLE

1. Fluid level and fluid quality
2. Line pressure
3. Governor pressure
4. Throttle wire
5. Control valve
* 4th speed cut valve
* Torque converter clutch control valve
6. Governor valve
* Primary governor valve
* Secondary governor valve 1
* Secondary governor valve 2

OFF VEHICLE

7. Torque converter

Lock-up is not released when acceler-
ator pedal is released.

ON VEHICLE

1. Fluid level and fluid quality
2. Torque converter clutch solenoid valve

Engine does not start in P and N positions, or engine starts in
positions other than P and N positions.

ON VEHICLE

1. Ignition switch and starter motor
2. Control linkage
3. PNP switch and wiring

Vehicle moves with selector lever in P position.

ON VEHICLE

1. Control linkage

OFF VEHICLE

2. Parking components

Symptom

Condition

Diagnostic Item