Celica ST Ltd Ed Liftback L4-1762cc 1.8L DOHC MFI (1997)
Cruise Control Module: Testing and Inspection
Electronically Controlled Transmission Communication Circuit
ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) COMMUNICATION CIRCUIT - SOLENOID # 2
CIRCUIT DESCRIPTION
When driving uphill under cruise control, in order to reduce shifting due to
ON-OFF overdrive operation and to provide smooth driving, when down
shifting in the electronically controlled transaxle occurs, a signal to prevent upshift until the end of the uphill slope is sent from the cruise control ECU to
the electronically controlled transaxle.
Terminal ECM of the cruise control ECU detects the shift change signal (output to electronically controlled transaxle No.2 solenoid) from the
electronically controlled transaxle.
If vehicle speed down, also when terminal electronically controlled transaxle of the cruise control ECU receives down shifting signal, it sends a signal
from terminal OD to OD1 to cut overdrive until the end of the uphill slope, and the gear shifts are reduced and gear shift points in the electronically
controlled transaxle are changed.
ECT Communication Circuit - Solenoid #2
WIRING DIAGRAM
Inspection Procedures / ECT Communication Circuit - Solenoid #2 (1 Of 5)
