Transmission Control System

CIRCUIT DESCRIPTION
The vehicle speed sensor detects the rotation speed of the transmission output shaft and sends signals to the ECM. The ECM determines the vehicle speed based on these signals.

An AC voltage is generated in the vehicle speed sensor coil as the rotor mounted on the output shaft rotates, and this voltage is sent to the ECM.

The gear shift point and lock-up timing are controlled by the ECM based on the signals from this vehicle speed sensor and the throttle position sensor signal.

If the vehicle speed sensor malfunctions, the ECM uses input signals from the direct clutch speed sensor as a back-up signal.




DETECTING CONDITIONS






HINT: Refer to the chart for the wave form between terminals SP2+ and SP2- when vehicle speed is approx. 60 KPH (37 MPH).




WIRING DIAGRAM

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Step 4:

INSPECTION PROCEDURE