Diagnosis - 4-Speed: Description: Introduction

Automatic transaxle is electronically controlled. Transaxle shifting and torque converter lock-up are controlled by Transmission Control Module (TCM).

The TCM receives information from various input devices and uses this information to control shift solenoids No. 1 and 2 on transaxle valve body for transaxle shifting, and Torque Converter Clutch (TCC) solenoid for torque converter lock-up.

An O/D cut switch is mounted on gear selector lever. When O/D cut switch is depressed to ON position, transaxle will shift into overdrive (OD) when gear selector lever is in "D" position, and O/D OFF indicator on instrument cluster will turn off. When O/D cut switch is released to OFF position, transaxle will shift into 3rd gear, and O/D OFF indicator will illuminate.