Nissan Terrano model r20 series 2004. Manual - part 225

Wiring Diagram — AT — LPSV

LHD MODELS

YAT278

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

AT-84

RHD MODELS

YAT279

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

Wiring Diagram — AT — LPSV (Cont’d)

AT-85

Line Pressure Solenoid Valve

DESCRIPTION

The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

:

LINE PRESSURE 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

Line pressure solenoid valve

:

10th judgement flicker

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

Remarks: Specification data are reference values.

Monitor item

Condition

Specification

Line pressure solenoid valve duty

Low line-pressure

(Small throttle opening)

"

High line-pressure

(Large throttle opening)

Approximately

29%

"

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)

With brake pedal depressed, shift the lever from “P”

,

“N”

,

“D”

,

“N”

,

“P” positions.

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

1)

Start engine.

2)

With brake pedal depressed, shift the lever from “P”

,

“N”

,

“D”

,

“N”

,

“P” positions.

3)

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

SAT341H

SAT824H

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

AT-86

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

4

and ground.
Resistance: 2.5 - 5

Ω

OK

E

NG

1. Remove control valve

assembly. Refer to
AT-118.

2. Check the following

items:

I

Line pressure solenoid
valve
Refer to “COMPO-
NENT INSPECTION”
on next page.

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

4

and TCM harness connector terminal

q

2

.

Resistance: 11.2 - 12.8

Ω

OK

E

NG

Check the following items:

I

Dropping resistor
Refer to “COMPONENT
INSPECTION” on next
page.

I

Harness for short or
open between TCM ter-
minal

q

2

and terminal

cord assembly (Main
harness)

CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal

q

4

and TCM harness connector terminal

q

1

.

Resistance:

Approximately 0

Ω

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

3. Reinstall any part removed.

OK

E

NG

Repair open circuit or short
to ground or short to
power in harness or con-
nector.

Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-86.

OK

E

NG

1. Perform TCM input/

output signal inspection.

2. If NG, recheck TCM pin

terminals for damage or
loose connection with
harness connector.

INSPECTION END

YAT321

YAT420

H

H

H

H

TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V

Line Pressure Solenoid Valve (Cont’d)

AT-87