Functions of Ect Ecu

Control of Shift Timing

The components which make up this system include:

• Water temperature sensor

• Cruise control ECU

• No. 1 and No. 2 solenoid valves (shift solenoids)

The ECU controls No. 1 and No. 2 solenoid valves based on vehicle speed, throttle opening angle and mode select switch position.

The ECT ECU prevents an upshift to overdrive under the following conditions:

• Water temperature is below 122'F to 146*F*

• Cruise control speed is 6 mph below set speed.

• OD main switch is off (contacts closed).

In addition to preventing the OD from engaging below a specific engine temperature, upshift to third gear is also prevented in the Supra and Cressida below 96'F and the V6 Camry below 100'F.

* Consult the specific repair manual or the ECT Diagnostic Information Technician Reference Card for the specific temperature at which overdrive is enabled.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

Get My Free Ebook

Post a comment