DTC 0104

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) (ECCS 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:
Steps 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.


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


Without Scan Tools
(1) Lift up drive wheels.
(2) Start engine.
(3) Read the voltage signal between ECM terminal (29) (Vehicle speed sensor signal) and ground with oscilloscope should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.






(4) Verify that the oscilloscope screen shows the signal wave as shown in figure.






Electrical Diagrams






Circuit Connectors






DIAGNOSTIC PROCEDURE