Tracker 4x2 L4-1590cc 1.6L (1991)
TCC Solenoid
TCC Relay Circuit
CIRCUIT DESCRIPTION:
Based on signals from the TPS (throttle opening), the ignition coil, and the CTS, the ECM will provide the ground for the Torque Converter Clutch
(TCC) circuit. The TCC (lock-up) solenoid, under control of the brake pedal switch, automatic transmission oil pressure switch, and the TCC relay,
opens and closes the automatic transmission oil passage to lock and unlock the torque converter clutch. For further description of operation of TCC, See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Related
Tests and Information/A Charts/Chart A-7A Fuel System Diagnosis
TEST DESCRIPTION: Most of the tests in this chart are checking for opens or shorts to ground or voltage. Shorts to voltage are unlikely and the most
common problems are loose connectors or dirty terminal contacts.
1.
This test attempts to eliminate the ECM TCC ground at "Y11." If the light is turned on then the ECM is grounding the circuit properly. If not, then
the ECM is at fault, and the ECM should be replaced after doing the ECM circuit resistance check in the Electrical and Electronic Specifications
.
DIAGNOSTIC AIDS:
The TCC will operate only under the following conditions:
1.
Throttle valve opening is greater than 7° and less than 62°.
2.
Coolant temperature is greater than 60°C (140°F).
3.
Brake pedal released (brake pedal switch "ON").
4.
Automatic transmission oil pressure is normal (oil pressure switch "ON").
