Nissan Terrano model r20 series 2004. Manual - part 218

Vehicle Speed Sensor

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MTR

DESCRIPTION

The vehicle speed sensor

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MTR is built into the speedometer

assembly. The sensor functions as an auxiliary device to the revo-
lution sensor when it is malfunctioning. The TCM will then use a
signal sent from the vehicle speed sensor

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MTR.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code

Malfunction is detected when ...

Check items

(Possible cause)

: VHCL SPEED SEN

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MTR

TCM does not receive the proper volt-
age signal from the sensor.

I

Harness or connectors
(The sensor circuit is open or
shorted.)

I

Vehicle speed sensor

: 2nd judgement flicker

SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE

After the repair, perform the following procedure to confirm the
malfunction is eliminated.

1)

Start engine.

2)

Select “SELF-DIAG RESULTS” mode with CONSULT-II.

3)

Drive vehicle under the following conditions:
Selector lever in “D” position and vehicle speed higher
than 20 km/h (12 MPH).

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1)

Start engine.

2)

Drive vehicle under the following conditions:
Selector lever in “D” position and vehicle speed higher
than 20 km/h (12 MPH).

3)

Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.

NAT238

SAT807H

TROUBLE DIAGNOSIS FOR VHCL SPEED SEN

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MTR

AT-56

DIAGNOSTIC PROCEDURE

CHECK INPUT SIGNAL.

1. Start engine.

2. Select “ECU INPUT SIGNALS” in

Data Monitor.

3. Read out the value of “VHCL/S

SE

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MTR” while driving.

Check the value changes accord-
ing to driving speed.

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

1. Start engine.

2. Check voltage between TCM ter-

minal

q

40

and ground while driving

at 2 to 3 km/h (1 to 2 MPH) for 1
m (3 ft) or more.
Voltage:

Voltage varies between less
than 1V and more than 4.5V.

OK

E

NG

Check the following items:

I

Vehicle speed sensor
and ground circuit for
vehicle speed sensor
Refer to EL section
(“METERS AND
GAUGES”).

I

Harness for short or
open between TCM and
vehicle speed sensor
(Main harness)

Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-56.

OK

E

NG

1. Perform TCM input/

output signal inspection.

2. If NG, recheck TCM pin

terminals for damage or
loose connection with
harness connector.

INSPECTION END

YAT414

H

H

TROUBLE DIAGNOSIS FOR VHCL SPEED SEN

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MTR

Vehicle Speed Sensor

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MTR (Cont’d)

AT-57

Wiring Diagram — AT — TPS

LHD MODELS

YAT265

TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN

AT-58

LHD MODELS

YAT401

TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN

Wiring Diagram — AT — TPS (Cont’d)

AT-59