Nissan Terrano model r20 series 2004. Instruction — 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
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