Transmission Speed Sensor: Testing and Inspection

Combination Meter & Vehicle Speed Sensor 2

A: DIAGNOSTICS PROCEDURE






If speedometer does not operate, or operates abnormally, check combination meter circuit (shown in flow chart as described above).

CAUTION:
Make sure that trouble code of vehicle speed sensor 2 system appears in electrical system on-board diagnosis.


1. CHECK POWER SUPPLY FOR COMBINATION METER.





1) Remove combination meter.
2) Turn ignition switch to ON.
3) Measure voltage at combination meter connector terminal.

Connector & terminal I Specified voltage:

(I14) No.11 - Body/ 10 V, or more



2. CHECK GROUND CIRCUIT OF COMBINATION METER.





1) Turn ignition switch to OFF.
2) Measure resistance of harness connector between combination meter and body.

Connector & terminal / Specified voltage:

(I12) No.1 - Body / 10 ohms - max.



3. CHECK HARNESS CONNECTOR BETWEEN COMBINATION METER AND VEHICLE SPEED SENSOR 2.






1) Disconnect connector from vehicle speed sensor 2.
2) Measure resistance of harness connector between vehicle speed sensor 2 and combination meter.

Connector & terminal / Specified resistance:

(B17) No.1 - (I11) No.2 / 10 ohms max.
(B17) No.2 - (I11) No.3 / 10 ohms max.


4. CHECK VEHICLE SPEED SENSOR 2.

NOTE:

If resistance between terminals of vehicle speed sensor 2 is out of specification, the sensor may have a failure.

If resistance is OK and voltage between terminals of vehicle speed sensor 2 is out of specification, mechanical trouble may be present between vehicle speed sensor 2 and speedometer shaft in transmission.








1) Disconnect connector from vehicle speed sensor 2.
2) Measure resistance between terminals of vehicle speed sensor 2.

Terminals / Specified resistance:

No.1 - No.2 / 350 - 450 ohms



WARNING:
Be careful not to be caught up by the running wheels.






3) Set the vehicle on free roller, or lift-up the vehicle and support with safety stands.
4) Drive the vehicle at speed greater than 20 km/h (12 MPH).
5) Measure voltage between terminals of vehicle speed sensor 2.

Terminals / Specified voltage:

No. 1 - No.2 / 5V,min. (AC range)











Using an oscilloscope:

(1) Turn ignition switch to OFF.
(2) Set oscilloscope to vehicle speed sensor 2.
(3) Drive the vehicle at speed greater than 20 km/h (12MPH).
(4) Measure signal voltage.

Specified voltage (V): 5 V, min.