engine NISSAN X-TRAIL 2003 Electronic Repair Manual

TORQUE CONVERTER CLUTCH SOLENOID VALVE
AT-421
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TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionECS0 04 U4
The torque converter clutch solenoid valve is activated, with the gear
in “D
4”, by the TCM in response to signals sent from the vehicle
speed and throttle position sensors. Lock-up piston operation will
then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up
condition, the engine speed should not change abruptly. If there is a
big jump in engine speed, there is no lock-up.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
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.
With CONSULT-II
1. Start engine.
2. Select “SELF-DIAG RESULTS” mode for A/T with CONSULT-II.
3. DrivevehicleinD
1®D2®D3®D4®D4lock-up position.
SCIA0718E
Monitor item Condition Specification
Torque converter clutch solenoid valve
dutyLock-up “OFF”
¯
Lock-up “ON”Approximately 4%
¯
Approximately 94%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
3GY/RTorque converter
clutch solenoid
valveWhen A/T performs lock-up. 8 - 15V
When A/T does not perform lock-up. 0V
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: T/C CLUTCH SOL/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.)
lT/C clutch solenoid valve
: 7th judgement flicker
SAT014K

AT-422
[ALL]
TORQUE CONVERTER CLUTCH SOLENOID VALVE
Without CONSULT-II
1. Start engine.
2. Drive vehicle in D
1®D2®D3®D4®D4lock-up position.
3. Perform self-diagnosis.
Refer to “SELF-DIAGNOSTIC PROCEDURE (Without CON-
SULT-II)”,AT-421, "
TORQUE CONVERTER CLUTCH SOLE-
NOID VALVE".
SCIA0701E

AT-424
[ALL]
TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
ECS004U6
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 5 and ground.
OK or NG
OK >> GO TO 2
NG >> 1. Remove oil pan. Refer toAT- 4 5 3 , "
Installation".
2. Check the following items:
Torque converter clutch solenoid valve
Refer to “Component Inspection”,AT-425, "
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 continuity between terminal 5 and TCM harness connector terminal 3.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK >> GO TO 3
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3.CHECK DTC
Perform Self-diagnosis Code confirmation procedure,AT - 4 2 1 , "
TORQUE CONVERTER CLUTCH SOLENOID
VA LV E".
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 : 5 - 20W
SCIA0731E
Continuity should exist.
SCIA0732E

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
AT-427
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ON BOARD DIAGNOSIS LOGIC
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
With CONSULT-II
1. Start engine.
2. Select “SELF-DIAG RESULTS” mode for A/T with CONSULT-II.
3. Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 10 km/h
(6 MPH), throttle opening greater than 1/8 of the full open posi-
tion, engine speed higher than 450 rpm and driving for more
than 10 minutes.
Without CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 10 km/h
(6 MPH), throttle opening greater than 1/8 of the full open posi-
tion, engine speed higher than 450 rpm and driving for more
than 10 minutes.
3. Perform self-diagnosis.
Refer to “SELF-DIAGNOSTIC PROCEDURE (Without CON-
SULT-II)”,AT- 4 2 7 , "
SELF-DIAGNOSIS CODE CONFIRMATION
PROCEDURE".
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: BATT/FLUID TEMP SEN
TCM receives an excessively low or high
voltage from the sensor.
lHarness or connectors
(The sensor circuit is open or shorted.)
lA/T fluid temperature sensor
: 8th judgement flicker
SAT014K
SCIA0702E

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
AT-429
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Diagnostic ProcedureECS004UA
1.CHECK TCM POWER SOURCE
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
3. Turn ignition switch to “OFF” position.
4. Check voltage between TCM terminal 28 and ground.
OK or NG
OK >> GO TO 2
NG >> Check the following items:
lHarness for short or open between ignition switch and
TCM (Main harness)
lIgnition switch and fuse
Refer to “PG-2, "
POWER SUPPLY ROUTING"”,
“POWER SUPPLY ROUTING”.
2.CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminals 6 and 7 when A/T is cold.
4. Reinstall any part removed.
OK or NG
OK (With CONSULT-II)>>GO TO 3
OK (Without CONSULT-II)>>GO TO 4
NG >> 1. Remove oil pan.
2. Check the following items:
A/T fluid temperature sensor
Refer to “Component Inspection”,AT-431, "
Compo-
nent Inspection".
Harness of terminal cord assembly for short or open Voltage:Batteryvoltage
Voltage:Batteryvoltage
SCIA0736E
Resistance Cold[20°C(68°F)]
: Approximately 2.5 kW
SCIA0737E

AT-430
[ALL]
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
3.CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (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 “FLUID TEMP SE”.
OK or NG
OK >> GO TO 5
NG >> Check the following item:
lHarness for short or open between TCM, ECM and
terminal cord assembly (Main harness)
lGround circuit for ECM
Refer to “”, “TROUBLE DIAGNOSIS FOR POWER
SUPPLY”.
4.CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 47 and ground while warming up A/T.
3. Turn ignition switch to “OFF” position.
4. Disconnect TCM harness connector.
5. Check resistance between terminal 42 and ground.
OK or NG
OK >> GO TO 5
NG >> Check the following item:
lHarness for short or open between TCM, ECM and
terminal cord assembly (Main harness)
lGround circuit for ECM
Refer to “”, “TROUBLE DIAGNOSIS FOR POWER
SUPPLY”. Vo l ta g e
Cold [20°C(68°F)]®Hot [80°C(176°F)] :
Approximately 1.5V®0.5V
SAT614J
Vo l ta g e
Cold [20°C(68°F)]®Hot [80°C(176°F)] :
Approximately 1.5V®0.5V
SCIA0738E
Continuity should exist.
SCIA0739E

AT-432
[ALL]
ENGINE SPEED SIGNAL
ENGINE SPEED SIGNAL
PFP:24825
DescriptionECS004UC
The engine speed signal is sent from the ECM to the TCM.
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.
With CONSULT-II
1. Start engine.
2. Select “SELF-DIAG RESULTS” mode for A/T with CONSULT-II.
3. Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 10 km/h
(6 MPH), throttle opening greater than 1/8 of the full throttle
position and driving for more than 10 seconds.
Without CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 10 km/h
(6 MPH), throttle opening greater than 1/8 of the full throttle
position and driving for more than 10 seconds.
3. Perform self-diagnosis.
Refer to “SELF-DIAGNOSTIC PROCEDURE (Without CON-
SULT-II)”,AT-432, "
ENGINE SPEED SIGNAL".
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
39 L/OREngine speed
signalandRefer toEC-79, "
ECM INSPECTION TABLE"
“ECM INSPECTION TABLE”.—
Diagnostic trouble code Malfunction is detected when... Check item (Possible cause)
: ENGINE SPEED SIG
TCM does not receive the proper voltage
signal from ECM.
lHarness or connectors
(The sensor circuit is open or shorted.)
: 9th judgement flicker
SAT014K
SCIA0703E

ENGINE SPEED SIGNAL
AT-433
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Wiring Diagram — AT — ENGSSECS004UD
TCWA0045E

AT-434
[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 “”, “DTC P1320 IGNITION SIGNAL”.
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:
lHarness for short or open between TCM and ECM
lResistor and ignition coil
Refer to “”, “DTC P1320 IGNITION SIGNAL”.
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:
lHarness for short or open between TCM and ECM
lResistor and ignition coil
Refer to “”, “DTC P1320 IGNITION SIGNAL”.
SAT014K
SAT645J
Voltage (Idle speed):
Refer to “”, “DTC P1320 IGNITION SIGNAL”.
SCIA0740E

ENGINE SPEED SIGNAL
AT-435
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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.