Corolla Sedan 4-Door L4-1587cc 1.6L 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 up shift until the end of the uphill slope is sent from the cruise control ECU
to the ECU.
Terminal ECT of the cruise control ECU detects the shift change signal (output to Electronically Controlled Transaxle No.2 solenoid) from the ECU.
If vehicle speed is down and terminal ECT of the cruise control ECU receives down shifting signal, it sends a signal from terminal OD to ECU to cut
overdrive until the end of the uphill slope, and the gear shifts are reduced.
ECT Communication Circuit - Solenoid #2
WIRING DIAGRAM
Inspection Procedures / ECT Communication Circuit - Solenoid #2 (1 Of 5)