Vehicle Speed Sensor: Testing and Inspection

DESCRIPTION
The vehicle speed sensor is installed in the transaxle. It contains a pulse generator which provides a vehicle speed signal to the speedometer. The speedometer then sends a signal to the ECM.




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a DTC might not be confirmed.

WITH CONSULT
1. Jack up drive wheels.
2. Start engine.




3. Perform "VEHICLE SPEED SEN CIRCUIT" in FUNCTION TEST" mode with CONSULT.

OR

WITH CONSULT
2. Start engine.




3. Read vehicle speed sensor signal in "DATA MONITOR" mode with CONSULT.
The vehicle speed on CONSULT should be able to exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.

OR




WITH GST
1. Jack up drive wheels.
2. Start engine.
3. Read vehicle speed sensor signal in "MODE 1" with GST.

NOTE: The vehicle speed on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.

OR

WITH NO TOOLS
1. Start engine and warm it up sufficiently.
2. Perform test drive for at least 10 seconds continuously under the following recommended conditions.

Engine speed:
(A/T models) 1,800 - 3,200 rpm (M/T models) 1,700 - 3,600 rpm
Intake manifold vacuum:
(A/T models) -46.7 to -20.0 kPa (-350 to -150 mmHg, -13.78 to -5.91 inHg) (M/T models) -46.7 to -33.3 kPa (-350 to -250 mmHg, -13.78 to -9.84 inHg)
Gear position:
Suitable position (except "N" or "P" position)

3. Stop the vehicle, turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
4. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Even though Diagnostic Trouble Code is not detected, perform the above test drive at least one more time.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE