P0500

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.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (43) (ECM ground).

ON BOARD DIAGNOSIS LOGIC:

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

CAUTION:
- Always drive vehicle at a safe speed.
- If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 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
2. Read vehicle speed sensor signal in "DATA MONITOR" mode with CONSULT-II. The vehicle speed on CONSULT-II should exceed 10 kph (6 MPH) when rotating wheels with suitable gear position.
If NG, go to "Diagnostic Procedure" below. If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT-II.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 10 consecutive seconds.
CMPS-RPM (REF): 1,800 - 3,450 rpm (A/T)
1,850 - 3,500 rpm (M/T)
COOLAN TEMP/S: More than 70°C (158°F)
B/FUEL SCHDL: 2.3 - 4.5 msec (A/T)
2.0 - 5.3 msec (M/T)
Selector lever: Suitable position
PW/ST SIGNAL: OFF
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

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. Jack up drive wheels.
2. Start engine.
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" below.

OR

Without Scan Tools
1. Jack up drive wheels.
2. Start engine.
3. Read the voltage signal between ECM terminal (28) (Vehicle speed sensor signal) and ground with oscilloscope.
4. Verify that the oscilloscope screen shows the signal wave as shown at "ECM TERMINALS AND REFERENCE VALUE".
5. If NG, go to "Diagnostic Procedure" below.

EC-VSS-01:

EC-VSS-01 - Connector View:

WIRING DIAGRAM

M8, E65:

F30, F32, M33:

DIAGNOSTIC PROCEDURE

Diagnostic Procedure: