NISSAN X-TRAIL 2003 Electronic Repair Manual

ENGINE SPEED SIGNAL
AT-435
[ALL]
D
E
F
G
H
I
J
K
L
MA
B
AT
4.CHECK DTC
Perform Self-diagnosis Code confirmation procedure,AT-432, "
ENGINE SPEED SIGNAL".
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 connector.

AT-436
[ALL]
LINE PRESSURE SOLENOID VALVE
LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS004UF
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.
The line pressure duty cycle value is not consistent when the
closed throttle position switch is “ON”. To confirm the line
pressure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is
“OFF”.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
NOTE:
The line pressure duty cycle value is not consistent when the closed throttle position switch is “ON”. To confirm the line pressure duty
cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is “OFF”.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
SCIA0735E
Monitor item Condition Specification
Line pressure solenoid valve dutySmall throttle opening
(Low line pressure)
¯
Large throttle opening
(High line pressure)Approximately 24%
¯
Approximately 95%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5-14V
When depressing accelerator pedal
fully after warming up engine.0V
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.
lHarness or connectors
(The solenoid circuit is open or shorted.)
lLine pressure solenoid valve
: 10th judgement flicker

LINE PRESSURE SOLENOID VALVE
AT-437
[ALL]
D
E
F
G
H
I
J
K
L
MA
B
AT
With CONSULT-II
1. Start engine.
2. Select “SELF-DIAG RESULTS” mode for A/T with CONSULT-II.
3. With brake pedal depressed, shift the lever from “P”®“N”®
“D”®“N”®“P” positions.
Without CONSULT-II
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 CON-
SULT-II)”,AT-436, "
LINE PRESSURE SOLENOID VALVE".
SAT014K
SCIA0704E

AT-438
[ALL]
LINE PRESSURE SOLENOID VALVE
Wiring Diagram — AT — LPSV
ECS004UG
TCWA0046E

LINE PRESSURE SOLENOID VALVE
AT-439
[ALL]
D
E
F
G
H
I
J
K
L
MA
B
AT
Diagnostic ProcedureECS004UH
1.CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 4 and ground.
OK or NG
OK >> GO TO 2
NG >> 1. Remove control valve assembly. Refer toAT-453,
"Installation".
2. Check the following items:
–Line pressure solenoid valve
Refer to “Component Inspection”,AT-441, "
Compo-
nent Inspection".
–Harness of terminal cord assembly for short or open
2.CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 2.
OK or NG
OK >> GO TO 3
NG >> Check the following items:
lDropping resistor
Refer to “Component Inspection”,AT-441, "
Compo-
nent Inspection".
lHarness for short or open between TCM terminal 2
and terminal cord assembly (Main harness) Resistance : 2.5 - 5W
SCIA0741E
Resistance : 10 - 15W
SCIA0742E

AT-440
[ALL]
LINE PRESSURE SOLENOID VALVE
3.CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal 4 and TCM harness connector terminal 1.
If OK, check harness for short to ground and short to power.
3. Reinstall any part removed.
OK or NG
OK >> GO TO 4
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
4.CHECK DTC
Perform Self-diagnosis Code confirmation procedure,AT-436, "
LINE PRESSURE SOLENOID VALVE".
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 connector. Resistance : Approx. 0W
SCIA0743E

LINE PRESSURE SOLENOID VALVE
AT-441
[ALL]
D
E
F
G
H
I
J
K
L
MA
B
AT
Component InspectionECS004UI
LINE PRESSURE SOLENOID VALVE
lFor removal, refer toAT-453, "Installation".
Resistance Check
lCheck resistance between two terminals.
Operation Check
lCheck solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0744E
Solenoid valve Terminal No.Resistance
(Approx.)
Line pressure
solenoid valve4 Ground 2.5 - 5W
SCIA0745E

AT-442
[ALL]
LINE PRESSURE SOLENOID VALVE
DROPPING RESISTOR
lCheck resistance between two terminals.
Resistance : 10 - 15W
SCIA0746E

CAN CAMMUNICATION LINE
AT-443
[ALL]
D
E
F
G
H
I
J
K
L
MA
B
AT
CAN CAMMUNICATION LINEPFP:31940
DescriptionECS004UJ
CAN (Control Area Network) is a serial communication line for real time application. It is an on-vehicle multi-
plex communication line with high data communication speed and excellent error detection ability. Many elec-
tonic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
*: This terminal is connected to the ECM.
On Board Diagnosis LogicECS004UK
** : A/T COMM LINE means CAN communication line.
Self-Diagnosis Code Confirmation ProcedureECS0 04 UL
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Wait at least 6 seconds or start engine and wait for at least 6
seconds.
WITHOUT CONSULT-II
1. Turn ignition switch “ON”.
2. Wait at least 6 seconds or start engine and wait at least 6 sec-
onds.
3. Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (NO TOOLS),
AT-273, "
Diagnostic Procedure Without CONSULT-II".
Te r m i -
nal No.Wire color Item ConditionJudgement
standard
(Approx.)
5 B/W CAN (H) — — —
6L/RCAN(L) — — —
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: A/T COMM LINE**
The ECM-AT communication line is open
or shorted.
lHarness or connectors
(The solenoid circuit is open or shorted.)
lLine pressure solenoid valve
: 11th judgement flicker
SAT014K
SAT599J

AT-444
[ALL]
CAN CAMMUNICATION LINE
Wiring Diagram — AT — CAN
ECS0 04 UM
TCWA0056E