2003 NISSAN X-TRAIL engine

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
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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

LINE PRESSURE SOLENOID VALVE
AT-439
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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

CAN CAMMUNICATION LINE
AT-443
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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

CAN CAMMUNICATION LINE
AT-445
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Diagnostic ProcedureECS004UN
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch to "ON" position. (Do not start engine.)
2. Select "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. The "CON COMM CIRCUIT" is detected.
Ye s o r N o ?
Yes >> Print out CONSULT-II screen, GO TO 2.
NG >> INSPECTION END
2.CHECK CAN COMMUNICATION SIGNALS
With CONSULT-II
1. Turn ignition switch to "ON" position. (Do not start engine.)
2. Select "CAN COMM SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
>> Print out CONSULT-II screen, go toLAN-5, "
CAN SYSTEM (FOR A/T MODELS)"
CAN Communication Signals
PCIA0061E
Normal conditions Abnormal conditions (examples)
CAN COMM : OK CAN COMM : OK
CANCIRC1:OK CANCIRC1:UNKWN
CANCIRC2:OK CANCIRC2:UNKWN
CANCIRC3:OK CANCIRC3:UNKWN
CANCIRC4:OK CANCIRC4:UNKWN
CANCIRC5:UNKWN CANCIRC5:UNKWN

AT-448
[ALL]
A/T SHIFT LOCK SYSTEM
Diagnostic Procedure
ECS00408
SYMPTOM 1:
lSelector lever cannot be moved from “P” position with key in ON position and brake pedal
applied.
lSelector lever can be moved from “P” position with key in ON position and brake pedal released.
lSelector lever can be moved from “P” position when key is removed from key cylinder.
SYMPTOM 2:
Ignition key cannot be removed when selector lever is set to “P” position. It can be removed when
selector lever is set to any position except “P”.
1.CHECKKEYINTERLOCKCABLE
Check key interlock cable for damage.
OK or NG
OK >> GO TO 2
NG >> Repair key interlock cable. Refer toAT - 4 5 2 , "
KEY INTERLOCK CABLE".
2.CHECK SELECTOR LEVER POSITION
Check selector lever position for damage.
OK or NG
OK >> GO TO 3
NG >> Check selector lever. Refer toAT - 4 5 6 , "
Park/Neutral Position (PNP) Switch Adjustment".
3.CHECK POWER SOURCE
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between stop lamp switch harness terminal 1 and ground.
OK or NG
OK >> GO TO 4
NG >> Check the following items:
1. Harness for short or open between battery and stop
lamp switch harness terminal 1
2. Fuse
3. Ignition switch (Refer toPG-2, "
POWER SUPPLY
ROUTING".) Voltage : Battery voltageSCIA0782E

A/T SHIFT LOCK SYSTEM
AT-449
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4.CHECK INPUT SIGNAL (A/T DEVICE)
Turn ignition switch to “ON” position.
(Do not start engine.)
lCheck voltage between A/T device harness terminal 7 and ground.
OK or NG
OK >> GO TO 5
NG >> Check the following items:
1. Harness for short and open between battery and stop
lamp switch harness connector 1.
2. Harness for short or open between stop lamp switch harness connector 2 and A/T device har-
ness connector 7.
3. Fuse
4. Stop lamp switch (Refer toAT- 4 5 0 , "
A/T DEVICE CHECK".)
5.CHECK GROUND CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness terminal 6 and ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. Voltage:
Brake pedal depressd:
Battery voltage
Brake pedal released:
0V
SCIA0783E
Continuity should exist.
SCIA0784E

AT-450
[ALL]
A/T SHIFT LOCK SYSTEM
6.CHECK RELAY CIRCUIT
1. Turn ignition switch to ON.
Check voltage between terminal 7 - 6 and 5 - 6.
OK or NG
OK >> GO TO 7
NG >> Replace A/T device.
7.CHECKPARKPOSITIONSWITCH
Refer toAT-450, "
A/T DEVICE CHECK".
OK or NG
OK >> GO TO 8
NG >> Replace A/T device.
8.CHECK SHIFT LOCK SOLENOID
Refer toAT-450, "
A/T DEVICE CHECK".
OK or NG
OK >> GO TO 9
NG >> Replace A/T device.
9.SHIFT LOCK OPERATION
1. Reconnect shift lock harness connector.
2. Turn ignition switch from “OFF” to “ON” position. (Do not start engine.)
3. Recheck shift lock operation.
OK or NG
OK >>INSPECTION END
NG >> 1. Perform A/T device input/output signal inspection test.
2. If NG, recheck harness connector connection.
A/T DEVICE CHECK
1. Shift Lock Solenoid
lCheck operation sound.
When ignition switch is turned to “ON” position and selector lever is set in “P” position.
SCIA0785E
Brake pedal Operation sound
Depressed Yes
Released No