VHCL SPEED SE

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.












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

- - - OR - - -

With CONSULT
(1) Start engine.
(2) Read vehicle speed sensor signal in "DATA MONITOR" mode with CONSULT. The vehicle speed on CONSULT should exceed 10 km/h (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): 1,600 - 2,400 rpm (A/T)
1,700 - 2,600 rpm (M/T)
COOLAN TEMP/S: More than 70°C (158°F)
B/FUEL SCHDL: 2- 3.5 ms (A/T)
1.8 - 4.2 ms (M/T)
Selector lever: Suitable position
PW/ST SIGNAL: OFF






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






Electrical Diagrams






Circuit Connectors






DIAGNOSTIC PROCEDURE