VEH SPEED SEN/CIRC

COMPONENT 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.




CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (25) (ECM ground).




ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

TESTING CONDITION: Step 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.







With Consult
1. Start engine (TCS switch "OFF").
2. Perform "VEHICLE SPEED SEN CIRCUIT" in "FUNCTION TEST" mode with CONSULT.

OR




With Consult
1. Start engine (TCS switch "OFF").
2. Read vehicle speed sensor signal in "DATA MONITOR" mode with CONSULT. The vehicle speed on CONSULT should exceed 10 KPH (6 MPH) when rotating wheels with suitable gear position.
If NG, go to "DIAGNOSTIC PROCEDURE". If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 10 consecutive seconds.
CKPS.RPM (POS): 1,400 - 1,900 rpm (A/T) 1,700 - 2,000 rpm (M/T)
COOLAN TEMP/S: More than 70 °C (158 °F)
B/FUEL SCHDL: 2 - 3 msec (A/T) 1.8 - 4.2 msec (M/T)
Selector lever: Suitable position
PW/ST SIGNAL: OFF

OR

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the EVAP canister vent control valve circuit. During this check, a DTC might not be confirmed.




With Generic Scan Tools
1. Lift up drive wheels.
2. Start engine (TCS switch "OFF").
3. Read vehicle speed sensor signal in "MODE 1" with GST.
The vehicle speed sensor on GST should be able to exceed 10 KPH (6 MPH) when rotating wheels with suitable gear position.
4. If NG, go to "DIAGNOSTIC PROCEDURE".

OR




Without Scan Tools
1. Lift up drive wheels.
2. Start engine (TCS switch "OFF").
3. Read the voltage signal between ECM terminal (29) (Vehicle speed sensor signal) and ground with oscilloscope should exceed 10 KPH (6 MPH) when rotating wheels with suitable gear position.
4. Verify that the oscilloscope screen shows the signal wave as shown in image.
5. If NG, go to "DIAGNOSTIC PROCEDURE".







WIRING DIAGRAM




DIAGNOSTIC PROCEDURE