Nissan Terrano r20e. Manual - part 18

 

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Nissan Terrano r20e. Manual - part 18

 

 

Overrun Clutch Solenoid Valve

DESCRIPTION

The overrun clutch solenoid valve is activated by the TCM in
response to signals sent from the park/neutral position switch, over-
drive control switch, vehicle speed and throttle (accelerator) posi-
tion sensors. The overrun clutch operation will then be controlled.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

:

OVERRUN CLUTCH S/V

TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.

I

Harness or connectors
(The solenoid circuit is open or
shorted.)

I

Overrun clutch solenoid valve

:

6th judgement flicker

SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE

After the repair, perform the following procedure to confirm the
malfunction is eliminated.

1)

Start engine.

2)

Select “SELF-DIAG RESULTS” mode with CONSULT-II.

3)

Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1)

Start engine.

2)

Drive vehicle under the following conditions:
Selector lever in “D” position, overdrive control switch in
“OFF” position and vehicle speed higher than 10 km/h (6
MPH).

3)

Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.

SAT341H

YAT351

TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V

AT-69

DIAGNOSTIC PROCEDURE

CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly

connector in engine compartment.

3. Check resistance between terminal

q

3

and ground.
Resistance: 20 - 40

OK

E

NG

1. Remove control valve

assembly. Refer to
AT-113.

2. Check the following items:

I

Overrun clutch solenoid
valve
Refer to “COMPONENT
INSPECTION” below.

I

Harness of terminal cord
assembly for short or open

CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal

q

3

and TCM harness connector terminal

q

20

.

Resistance:

Approximately 0

If OK, check harness for short to
ground and short to power.

4. Reinstall any part removed.

OK

E

NG

Repair open circuit or short
to ground or short to power
in harness or connector.

Perform “SELF-DIAGNOSIS CODE
CONFIRMATION PROCEDURE”, AT-69.

OK

E

NG

1. Perform TCM input/output

signal inspection.

2. If NG, recheck TCM pin

terminals for damage or
loose connection with har-
ness connector.

INSPECTION END

COMPONENT INSPECTION

Overrun clutch solenoid valve

I

For removal, refer to AT-113.

Resistance check

I

Check resistance between terminal

q

3

and ground.

Solenoid valve

Terminal No.

Resistance

(Approx.)

Overrun clutch
solenoid valve

q

3

Ground

20 - 40

Operation check

I

Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal

q

3

and ground.

YAT308

YAT309

YAT310

YAT311

H

H

H

TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V

Overrun Clutch Solenoid Valve (Cont’d)

AT-70

Wiring Diagram — AT — TCV

YAT277

TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V

AT-71

Torque Converter Clutch Solenoid Valve

DESCRIPTION

The torque converter clutch solenoid valve is activated, with the
gear in D

4

, by the TCM in response to signals sent from the vehicle

speed and throttle (accelerator) position sensors. Torque converter
clutch piston operation will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

:

T/C CLUTCH SOL/V

TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.

I

Harness or connectors
(The solenoid circuit is open or
shorted.)

I

T/C clutch solenoid valve

:

7th judgement flicker

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Remarks: Specification data are reference values.

Monitor item

Condition

Specification

Torque converter clutch solenoid valve
duty

Lock-up “OFF”

"

Lock-up “ON”

Approximately

4%

"

Approximately

94%

SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE

After the repair, perform the following procedure to confirm the
malfunction is eliminated.

1)

Start engine.

2)

Select “SELF-DIAG RESULTS” mode with CONSULT-II.

3)

Drive vehicle in D

1

,

D

2

,

D

3

,

D

4

,

D

4

lock-up

position.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1)

Start engine.

2)

Drive vehicle in D

1

,

D

2

,

D

3

,

D

4

,

D

4

lock-up

position.

3)

Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.

SAT342HA

SAT818H

TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V

AT-72

 

 

 

 

 

 

 

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