Toyota Ect Repair

The ECT ECU has been isolated from the ECM and directly fitted to the transaxle. Thus, the wiring harness has been shortened allowing the weight to be reduced. All the solenoid valves and sensors used for automatic transaxle control are directly connected to the ECT ECU through the connector located in front of the automatic transaxle.

The ECT ECU maintains communication with the ECM through the CAN (Controller Area Network). Thus, engine control is effected in coordination with ECT control.

A label, on which the automatic transaxle compensation values and QR (Quick Response) code are printed, is attached on the top of the automatic transaxle. The label contains encoded automatic transaxle property information. When the automatic transaxle is replaced, allow the ECT ECU to learn the automatic transaxle property information by inputting the automatic transaxle compensation values into the ECT ECU using a hand-held tester. In this way, the shift control performance immediately after replacement of the automatic transaxle is improved. For details, see the 2007 Camry Repair Manual (Pub. No. RM0250U).

The QR code, which requires a special scan tool, is used at the vehicle assembly plant.

QR Code

ECT ECU

ECT ECU

Transaxle Connector

Automatic Transaxle Compensation Value

QR Code

Automatic Transaxle Compensation Value

Transaxle Connector

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