LEMON Manuals: Even more car manuals for everyone
Home >> Geo >> 1996 >> Tracker Base, 4D Utility, 4WD, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - Aw03-72LE (With OBD-II) >> Diagnostic Tests >> DTC P0743 Or P0773: Torque Converter Clutch (TCC) Circuit Fault >> Notes

DTC P0743 Or P0773: Torque Converter Clutch (TCC) Circuit Fault: Notes

NOTE: DTC P0743 or P0773 will set if voltage detected at TCM terminal No. 12 is 2 volts or less when TCC control solenoid valve is on, or 5.5 volts or greater when off.
  1. Turn ignition switch to LOCK position. Disconnect TCM harness connector. Using a DVOM, measure resistance between ground and TCM harness connector terminal No. 12 (Green/Yellow wire). If resistance is 11-15 ohms at room temperature, go to step 4). If resistance is not as specified, go to next step.
  2. Disconnect TCC control solenoid valve harness connector closest to transmission. Using a DVOM, measure resistance between ground and TCM harness connector terminal No. 12 (Green/Yellow wire). If resistance is less than 2 ohms, repair Green/Yellow wire for a short to ground between TCM and TCC control solenoid valve. If resistance is not as specified, go to next step.
  3. Using a DVOM, measure resistance of Green/Yellow wire between TCM harness connector terminal No. 12 and harness connector which was disconnected in step 2). If resistance is less than 2 ohms, remove transmission oil pan and inspect internal wire harness for damage. Repair as necessary. If harness is okay, replace TCC control solenoid valve. If resistance is not as specified, repair open in Green/Yellow wire between TCM and TCC control solenoid valve.
  4. Turn ignition on. Using a DVOM, measure voltage between ground and TCM harness connector terminal No. 12 (Green/Yellow wire). If reading is less than one volt, go to next step. If reading is not as specified, repair Green/Yellow wire for a short to power between TCM and TCC control solenoid valve.
  5. Inspect all harness connectors for poor connections. Repair as necessary and retest system. If harness connections are okay, go to next step.
  6. Reconnect TCM harness connector. Clear DTCs. See CLEARING TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Road test vehicle and recheck for DTCs. If DTC P0743 or P0773 resets, replace TCM. If DTC P0743 or P0773 does not reset, fault is not present at this time. Check for an intermittent problem. See DIAGNOSTIC AIDS.
scientia non olet · About LEMON Manuals