NISSAN X-TRAIL 2001 Service Repair Manual

ENGINE SPEED SIGNAL
AT-393
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Wiring Diagram — AT — ENGSSECS004UD
TCWA0045E

AT-394
[ALL]
ENGINE SPEED SIGNAL
Diagnostic Procedure
ECS004UE
1. CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control. Check ignition signal circuit condi-
tion.
OK or NG
OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 3.
NG >> Check ignition signal circuit for engine control. Refer to EC-683, "
IGNITION SIGNAL" (QR25DE)
orEC-1331, "
IGNITION SIGNAL" (QR20DE).
2. CHECK INPUT SIGNAL (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Read out the value of “ENGINE SPEED”.
Check engine speed changes according to throttle position.
OK or NG
OK >> GO TO 4.
NG >> Check the following items:
●Harness for short or open between TCM and ECM
●Resistor and ignition coil
Refer to EC-683, "
IGNITION SIGNAL" (QR25DE) or
EC-1331, "
IGNITION SIGNAL" (QR20DE).
SAT014K
SAT645J

ENGINE SPEED SIGNAL
AT-395
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3.CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 39 and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following items:
●Harness for short or open between TCM and ECM
●Resistor and ignition coil
Refer to EC-683, "
IGNITION SIGNAL" (QR25DE) or
EC-1331, "
IGNITION SIGNAL" (QR20DE).
4.CHECK DTC
Perform Self-diagnosis Code confirmation procedure. Refer to AT- 3 9 2 , "
SELF-DIAGNOSIS CODE CONFIR-
MATION PROCEDURE" .
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. Voltage (Idle speed):
Refer to EC-479, "
ECM INSPECTION TABLE"
(QR25DE) or EC-1166, "ECM INSPECTION
TABLE" (QR20DE).
SCIA0740E

AT-396
[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.
●Harness or connectors
(The solenoid circuit is open or shorted.)
●Line pressure solenoid valve
: 10th judgement flicker

LINE PRESSURE SOLENOID VALVE
AT-397
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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 AT- 2 5 3 , "
SELF-DIAGNOSTIC PROCEDURE (WITH-
OUT CONSULT-II)" .
SAT014K
SCIA0704E

AT-398
[ALL]
LINE PRESSURE SOLENOID VALVE
Wiring Diagram — AT — LPSV
ECS004UG
TCWA0046E

LINE PRESSURE SOLENOID VALVE
AT-399
[ALL]
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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 to AT- 4 1 3 ,
"Installation" .
2. Check the following items:
–Line pressure solenoid valve
Refer to AT- 4 0 1 , "
Component 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:
●Dropping resistor
Refer to AT- 4 0 1 , "
Component Inspection" .
●Harness for short or open between TCM terminal 2
and terminal cord assembly Resistance: 2.5 - 5Ω
SCIA0741E
Resistance: 10 - 15Ω
SCIA0742E

AT-400
[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. Refer to AT- 3 9 6 , "
SELF-DIAGNOSIS CODE CONFIR-
MATION PROCEDURE" .
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. 0Ω
SCIA0743E

LINE PRESSURE SOLENOID VALVE
AT-401
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Component InspectionECS004UI
LINE PRESSURE SOLENOID VALVE
●For removal, refer to AT- 4 1 4 , "Control Valve Assembly and
Accumulators" .
Resistance Check
●Check resistance between two terminals.
Operation Check
●Check 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 - 5Ω
SCIA0745E

AT-402
[ALL]
LINE PRESSURE SOLENOID VALVE
DROPPING RESISTOR
●Check resistance between two terminals.
Resistance: 10 - 15Ω
SCIA0746E