Electronically Controlled Transaxle

The electronic control system consists of the Transmission Control module (TCM), sensors, a linear solenoid and 4 solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under any conditions. The TCM is located on the insulator center bulkhead, behind the driver's seat. Shifting is related to engine torque through the linear solenoid used to operate throttle valve (B), which is controlled by the TCM. Getting a signal from each sensor, the TCM detects the appropriate gear shifting and activates shift control solenoid valves (A) and/or (B). See Fig 1 . From sensor input signals, the TCM detects whether to turn the lock-up ON or OFF and activates lock-up control solenoid valve (A) and/or (B) accordingly. See Fig 2 .

The ECM transmits an engine RPM signal to the TCM.

Fig 1: Identifying Shift Control Solenoid Actuation

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Lock-Up Control Solenoid Actuation

Courtesy of AMERICAN HONDA MOTOR CO., INC.