NISSAN X-TRAIL 2003 Service Repair Manual

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
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DTC Confirmation ProcedureECS00CT1
CAUTION:

Always drive vehicle at a safe speed.

If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait
at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Drive vehicle under the following conditions.
SLCT LVR POSI: D position
VHCL SPEED SE: higher than 20 km/h (12 MPH)
4. If the check result is NG, go to AT- 3 7 7 , "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions.
Selector lever position: D position
Vehicle speed: higher than 20 km/h (12 MPH)
3. Perform self-diagnosis.
Refer to AT- 5 2 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 3 7 7 , "
Diagnostic Procedure" .
SAT014K
SCIA5358E
SCIA5598E

AT-376
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BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)

Wiring Diagram — AT — BA/FTSECS004U9
TCWA0235E

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
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TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL
Diagnostic ProcedureECS004UA
1. CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector and ground.
3. Turn ignition switch OFF.
4. Check voltage between TCM connector and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
10 BR/W Power source
or When turning ignition switch to “ON”. Battery voltage
When turning ignition switch to
“OFF”.0V
19 BR/W Power source Same as No. 10
28 LPower source
(Memory back-up)Always Battery voltage
42 B Sensor ground Always 0V
47 BRA/T fluid tempera-
ture sensorWhen ATF temperature is 20°C
(68°F).1.5V
When ATF temperature is 80°C
(176°F).0.5V
Name Connec-
tor No. Terminal
No. (Wire
color)Judgement standard (Approx.)
Power source F4610 (BR/W) Battery voltage
19 (BR/W) Battery voltage
Power source
(Memory back-up)F47 28 (L) Battery voltage
SCIA2656E
Name Connec-
tor No. Terminal
No. (Wire
color)Judgement standard (Approx.)
Power source F4610 (BR/W) 0V
19 (BR/W) 0V
Power source
(Memory back-up)F47 28 (L) Battery voltage
SCIA2657E

AT-378
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BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)

2. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM terminal 10, 19

Harness for short or open between battery and TCM terminal 28

Fuse

Ignition switch. Refer to PG-2, "POWER SUPPLY ROUTING" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
3. CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR
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”.
Without CONSULT-II
1. Start engine.
2. Check voltage TCM connector while warming up A/T.
OK or NG
OK >> GO TO 9.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between TCM, ECM and terminal cord assembly

Ground circuit for ECM
Refer to PG-2, "
POWER SUPPLY ROUTING" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
Monitor item Condition Display value
FLUID TEMP
SEWhen ATF temperature is 20°C (68°F). 1.5V
When ATF temperature is 80°C (176°F). 0.5V
LCIA0090E
Name Connec-
tor No. Terminal
No. (Wire
color) ConditionJudge-
ment stan-
dard
(Approx.)
A/T fluid
temperature
sensor F47 47 (BR) -
42 (B)When ATF temperature
is 20°C (68°F).1.5V
When ATF temperature
is 80°C (176°F).0.5V
SCIA2658E

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
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5. CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the TCM connector.
3. Check resistance between terminals.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6. CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.
3. Check continuity between terminal cord assembly harness con-
nector and TCM connector.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between ground and transaxle assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Name Connector
No. Terminal No.
(Wire color) Tempera-
ture °C (°F) Resistance
(KΩ) (Approx.)
A/T fluid
tempera-
ture sensor F47 47 (BR) - 42 (B) 20 (68) 2.5
80 (176) 0.3
SCIA2338E
Item Connector No.Terminal No.
(Wire color)Continuity
TCM F47 42 (B)
Ye s
Terminal cord assembly
harness connectorF23 7 (B)
Item Connector No.Terminal No.
(Wire color)Continuity
TCM F47 47 (BR)
Ye s
Terminal cord assembly
harness connectorF23 6 (BR)
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BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)

7. CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly connector in engine room.
3. Check resistance between terminal cord assembly F23 termi-
nals 6 (BR) and 7 (B) when A/T is cold.
4. Reinstall any part removed.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. DETECT MALFUNCTIONING ITEM
1. Remove oil pan. Refer to AT- 4 0 4 , "
Control Valve Assembly and Accumulators" .
2. Check the following items:
–A/T fluid temperature sensor
 Check resistance between two terminals while changing temper-
ature as shown.
–Harness of terminal cord assembly for short or open
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK DTC
Perform AT- 3 7 5 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
10. CHECK TCM
1. Check TCM input/output signal. Refer to AT- 9 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Temperature °C (°F) Resistance
20 (68) Approx. 2.5 kΩ
80 (176) Approx. 0.3 kΩ
LCIA0095E
Temperature °C (°F) Resistance
20 (68) Approx. 2.5 kΩ
80 (176) Approx. 0.3 kΩ
SAT298F

BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POW-
ER SOURCE)
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Component InspectionECS004UB
A/T FLUID TEMPERATURE SENSOR

For removal, refer toAT- 4 0 4 , "Control Valve Assembly and Accu-
mulators" .

Check resistance between two terminals while changing temper-
ature as shown at left.
Temperature °C (°F) Resistance
20 (68) Approximately 2.5 kΩ
80 (176) Approximately 0.3 kΩ
SAT298F

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ENGINE SPEED SIGNAL

ENGINE SPEED SIGNALPFP:24825
DescriptionECS004UC
The engine speed signal is sent from the ECM to the TCM.
CONSULT-II Reference ValueECS00CT2
Remarks: Specification data are reference values.
On Board Diagnosis LogicECS00CT3
DTC Confirmation ProcedureECS00CT4
CAUTION:

Always drive vehicle at a safe speed.

If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait
at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“A/T” with CONSULT-II.
2. Start engine and maintain the following conditions for at least 10
consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.2V
SLCT LVR POSI: D position
3. If the check result is NG, go to AT- 3 8 4 , "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions for more than 10 seconds.
Selector lever position: D position
Vehicle speed: higher than 10 km/h (6 MPH)
Throttle position: greater than 1.0/8 of the full throttle position
3. Perform self-diagnosis.
Refer to AT- 5 2 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 3 8 4 , "
Diagnostic Procedure" .
Monitor item Condition Display value
ENGINE SPEED (rpm) Engine running Approximately matches the tachometer
reading.
Diagnostic trouble code Malfunction is detected when... Check item (Possible cause)
: ENGINE SPEED SIG
TCM does not receive the proper voltage
signal from ECM.

Harness or connectors
(The sensor circuit is open or shorted.)
: 9th judgement flicker
SAT014K
SCIA5599E

ENGINE SPEED SIGNAL
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Wiring Diagram — AT — ENGSSECS004UD
TCWA0232E

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ENGINE SPEED SIGNAL

TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL
Diagnostic ProcedureECS004UE
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 >> GO TO 2.
NG >> Check ignition signal circuit for engine control. Refer to EC-417, "
IGNITION SIGNAL" (WITH
EURO-OBD) or EC-798, "
IGNITION SIGNAL" (WITHOUT EURO-OBD).
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
39 L/OREngine speed
signal
and
Refer to EC-95, "
ECM INSPECTION TABLE"
(WITH EURO-OBD) or EC-543, "
ECM
INSPECTION TABLE" (WITHOUT EURO-
OBD).—