Nissan 240SX — Automatic Transmission (Section AT) (2000 year). Manual — part 11

6

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly. Refer to “ON-VEHICLE SERVICE”, AT-205.
2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.
4. Check the following items:

I

Oil pump assembly

I

Torque converter

I

Reverse clutch assembly

I

High clutch assembly

I

Low & reverse brake assembly

I

Low one-way clutch

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

9. Vehicle Does Not Creep Backward In “R” Position (Cont’d)

AT-161

10. Vehicle Does Not Creep Forward In “D”, “2”
Or “1” Position

=NMAT0079

SYMPTOM:
Vehicle does not creep forward when selecting “D”, “2” or “1”
position.

1

CHECK A/T FLUID LEVEL

Check A/T fluid level again. Refer to AT-9.

SAT638A

OK or NG

OK

©

GO TO 2.

NG

©

Refill ATF.

2

CHECK STALL TEST

Check stall revolution with selector lever in “D” position.
Refer to “STALL TEST”, AT-48.

SAT493G

OK or NG

OK

©

GO TO 3.

NG

©

GO TO 6.

TROUBLE DIAGNOSES FOR SYMPTOMS

10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position

AT-162

3

CHECK LINE PRESSURE

Check line pressure at idle with selector lever in “R” position.
Refer to “LINE PRESSURE TEST”, AT-51.

SAT494G

OK or NG

OK

©

GO TO 4.

NG

©

1. Remove control valve assembly.

Refer to AT-205.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot
valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.
4. Check the following items:

I

Oil pump assembly

4

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 6.

5

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position (Cont’d)

AT-163

6

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly. Refer to “ON-VEHICLE SERVICE”, AT-205.
2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.
4. Check the following items:

I

Oil pump assembly

I

Forward clutch assembly

I

Forward one-way clutch

I

Low one-way clutch

I

Low & reverse brake assembly

I

Torque converter

©

Repair or replace damaged parts.

TROUBLE DIAGNOSES FOR SYMPTOMS

10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position (Cont’d)

AT-164

11. Vehicle Cannot Be Started From D

1

=NMAT0080

SYMPTOM:
Vehicle cannot be started from D

1

on Cruise test — Part 1.

1

CHECK SYMPTOM

Is “6. Vehicle Does Not Creep Backward In “R” Position” OK?

Yes or No

Yes

©

GO TO 2.

No

©

Go to “9. Vehicle Does Not Creep Backward In “R” Position”, AT-159.

2

CHECK SELF-DIAGNOSTIC RESULTS

Does self-diagnosis show damage to vehicle speed sensor·A/T (revolution sensor), shift solenoid valve A, B or vehicle
speed sensor·MTR after cruise test?

SAT934FB

Yes or No

Yes

©

Check damaged circuit. Refer to AT-89, AT-95, AT-106 or AT-111.

No

©

GO TO 3.

3

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-141, “Component Description”.

SAT414K

OK or NG

OK

©

GO TO 4.

NG

©

Repair or replace throttle position sensor.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

11. Vehicle Cannot Be Started From D

1

AT-165

4

CHECK LINE PRESSURE

Check line pressure at stall point with selector lever in “D” position.
Refer to “LINE PRESSURE TEST”, AT-51.

SAT494G

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 8.

5

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 8.

6

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly.

Refer to AT-205.

2. Check the following items:

I

Shift valve A

I

Shift valve B

I

Shift solenoid valve A

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

OK or NG

OK

©

GO TO 7.

NG

©

Repair or replace damaged parts.

TROUBLE DIAGNOSES FOR SYMPTOMS

11. Vehicle Cannot Be Started From D

1

(Cont’d)

AT-166

7

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

8

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly.

Refer to AT-205.

2. Check the following items:

I

Shift valve A

I

Shift valve B

I

Shift solenoid valve A

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.
4. Check the following items:

I

Forward clutch assembly

I

Forward one-way clutch

I

Low one-way clutch

I

High clutch assembly

I

Torque converter

I

Oil pump assembly

OK or NG

OK

©

GO TO 7.

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

11. Vehicle Cannot Be Started From D

1

(Cont’d)

AT-167

12. A/T Does Not Shift: D

1

→

D

2

Or Does Not

Kickdown: D

4

→

D

2

=NMAT0081

SYMPTOM:
A/T does not shift from D

1

to D

2

at the specified speed.

A/T does not shift from D

4

to D

2

when depressing accelerator

pedal fully at the specified speed.

1

CHECK SYMPTOM

Are “7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “8. Vehicle Cannot Be Started From D

1

” OK?

Yes or No

Yes

©

GO TO 2.

No

©

Go to “10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “11. Vehicle
Cannot Be Started From D

1

”, AT-162, 165.

2

CHECK PNP SWITCH CIRCUIT

With CONSULT-II

Does “TCM INPUT SIGNALS” in Data Monitor show damage to PNP switch circuit?

Without CONSULT-II

Does self-diagnosis show damage to PNP switch circuit?

SAT146BA

Yes or No

Yes

©

Check PNP switch circuit. Refer to AT-189.

No

©

GO TO 3.

3

CHECK VEHICLE SPEED SENSOR·A/T AND VEHICLE SPEED SENSOR·MTR CIRCUIT

Check vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuit. Refer to AT-89, AT-95.

OK or NG

OK

©

GO TO 4.

NG

©

Repair or replace vehicle speed sensor·A/T (revolution sensor) and vehicle speed
sensor·MTR circuits.

TROUBLE DIAGNOSES FOR SYMPTOMS

12. A/T Does Not Shift: D

1

→

D

2

Or Does Not Kickdown: D

4

→

D

2

AT-168

4

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-141, “Component Description”.

SAT414K

OK or NG

OK

©

GO TO 5.

NG

©

Repair or replace throttle position sensor.

5

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 8.

6

DETECT MALFUNCTIONING ITEM

1. Remove control valve. Refer to AT-205.
2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

OK or NG

OK

©

GO TO 7.

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

12. A/T Does Not Shift: D

1

→

D

2

Or Does Not Kickdown: D

4

→

D

2

(Cont’d)

AT-169

7

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

8

DETECT MALFUNCTIONING ITEM

1. Remove control valve. Refer to AT-205.
2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.
4. Check the following items:

I

Servo piston assembly

I

Brake band

I

Oil pump assembly

OK or NG

OK

©

GO TO 7.

NG

©

Repair or replace damaged parts.

TROUBLE DIAGNOSES FOR SYMPTOMS

12. A/T Does Not Shift: D

1

→

D

2

Or Does Not Kickdown: D

4

→

D

2

(Cont’d)

AT-170

13. A/T Does Not Shift: D

2

→

D

3

=NMAT0082

SYMPTOM:
A/T does not shift from D

2

to D

3

at the specified speed.

1

CHECK SYMPTOM

Are “7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “8. Vehicle Cannot Be Started From D

1

” OK?

Yes or No

Yes

©

GO TO 2.

No

©

Go to “10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “11. Vehicle
Cannot Be Started From D

1

”, AT-162, 165.

2

CHECK PNP SWITCH CIRCUIT

With CONSULT-II

Does “TCM INPUT SIGNALS” in Data Monitor show damage to PNP switch circuit?

Without CONSULT-II

Does self-diagnosis show damage to PNP switch circuit?

SAT146BA

Yes or No

Yes

©

Check PNP switch circuit. Refer to AT-189.

No

©

GO TO 3.

3

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-141, “Component Description”.

SAT414K

OK or NG

OK

©

GO TO 4.

NG

©

Repair or replace throttle position sensor.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

13. A/T Does Not Shift: D

2

→

D

3

AT-171

4

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 7.

5

DETECT MALFUNCTIONING ITEM

1. Remove control valve Assembly. Refer to AT-205.
2. Check the following items:

I

Shift valve B

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

6

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

TROUBLE DIAGNOSES FOR SYMPTOMS

13. A/T Does Not Shift: D

2

→

D

3

(Cont’d)

AT-172

7

DETECT MALFUNCTIONING ITEM

1. Remove control valve Assembly. Refer to AT-205.
2. Check the following items:

I

Shift valve B

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.
4. Check the following items:

I

Servo piston assembly

I

High clutch assembly

I

Oil pump assembly

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

13. A/T Does Not Shift: D

2

→

D

3

(Cont’d)

AT-173

14. A/T Does Not Shift: D

3

→

D

4

=NMAT0083

SYMPTOM:

I

A/T does not shift from D

3

to D

4

at the specified speed.

I

A/T must be warm before D

3

to D

4

shift will occur.

1

CHECK SYMPTOM

Are “10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “11. Vehicle Cannot Be Started From D

1

” OK?

Yes or No

Yes

©

GO TO 2.

No

©

Go to “10. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position” and “11. Vehicle
Cannot Be Started From D

1

”, AT-162, 165.

2

CHECK SELF-DIAGNOSTIC RESULTS

With CONSULT-II

Does self-diagnosis, after cruise test, show damage to any of the following circuits?

I

PNP switch

I

Overdrive control switch

I

A/T fluid temperature sensor

I

Revolution sensor

I

Shift solenoid valve A or B

I

Vehicle speed sensor

SAT833HA

Yes or No

Yes

©

Check damaged circuit. Refer to AT-89, AT-95, AT-106, AT-111, AT-125 or 189.

No

©

GO TO 3.

3

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-141, “Component Description”.

SAT414K

OK or NG

OK

©

GO TO 4.

NG

©

Repair or replace throttle position sensor.

TROUBLE DIAGNOSES FOR SYMPTOMS

14. A/T Does Not Shift: D

3

→

D

4

AT-174

4

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 7.

5

DETECT MALFUNCTIONING ITEM

1. Remove control valve Assembly. Refer to AT-205.
2. Check the following items:

I

Shift valve B

I

Overrun clutch control valve

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

6

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

14. A/T Does Not Shift: D

3

→

D

4

(Cont’d)

AT-175

7

DETECT MALFUNCTIONING ITEM

1. Remove control valve Assembly. Refer to AT-205.
2. Check the following items:

I

Shift valve B

I

Overrun clutch control valve

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.
4. Check the following items:

I

Servo piston assembly

I

Brake band

I

Torque converter

I

Oil pump assembly

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

TROUBLE DIAGNOSES FOR SYMPTOMS

14. A/T Does Not Shift: D

3

→

D

4

(Cont’d)

AT-176