P0743

Test 1:

Test 2 - 5:

Test 6 - 9:

Test 10 - 12:

Test 13:

SYMPTOM
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS

WHEN MONITORED
Continuously with the key on.

SET CONDITION
This code will set if the voltage detected on the Torque Converter Clutch Solenoid Control circuit at the PCM is different than the expected voltage.

POSSIBLE CAUSES
- TCC solenoid control circuit open
- Fused B+ circuit open
- TCC solenoid control circuit short to ground
- Transmission relay output circuit short to ground
- TCC solenoid control circuit short to voltage
- TCC solenoid control circuit short to other circuits
- Transmission control relay output circuit open
- Torque converter clutch solenoid
- Transmission control relay - poor contacts
- Powertrain control module
- Intermittent wiring and connectors