Test 7B - Relay Always On
NOTE:
Perform TEST 1A
before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
. Perform VERIFICATION TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Use scan tool in voltmeter mode. On F24S and FJ22 models, measure voltage at terminal "C" on transmission control relay connector. On all other models, measure voltage at terminal "A" on transmission control relay connector. On all models, if voltage is 10 volts or less, replace Transmission Control Module (TCM). If voltage is more than 10 volts, go to next step.
- Turn ignition off. Disconnect TCM connector. Turn ignition on. Use scan tool in voltmeter mode. On F24S and FJ22 models, measure voltage at terminal "C" on transmission control relay connector. On all other models, measure voltage at terminal "A" on transmission control relay connector. On all models, if voltage is 10 volts or less, replace TCM. If voltage is more than 10 volts, repair 12-volt supply circuit for short to voltage.