LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2001 >> Neon R/T >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0743: Torque Converter Clutch Solenoid/Trans Relay Circuits >> Testing

DTC P0743: Torque Converter Clutch Solenoid/Trans Relay Circuits: Testing

  1. Turn ignition on. Using scan tool, read DTCs. If GOOD TRIP is displayed and equal to zero, go to next step.If GOOD TRIP is not displayed and equal to zero, go to step  8 .
  2. Turn ignition off. Disconnect TCC solenoid harness connector. See Figure . Turn ignition on. Turn all accessories off. Connect a test light between TCC solenoid harness connector terminals. Using scan tool, actuate TCC solenoid. If test light does not flash, go to next step. If test light flashes, replace TCC solenoid.
  3. Turn ignition off then on. Connect test light between ground and fused ignition switch output circuit (Dark Blue/White wire) at TCC solenoid harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open in fused ignition switch output circuit.
  4. Measure voltage between ground and TCC solenoid control circuit (Orange/Black wire) at TCC solenoid harness connector. If voltage is .5 volt or less, go to next step. If voltage is more than .5 volt, repair short to voltage in TCC solenoid control circuit.
  5. Turn ignition off. Disconnect PCM harness connectors. PCM is located in engine compartment, between air cleaner and radiator. Measure resistance between ground and TCC solenoid control circuit (Orange/Black wire) at TCC solenoid harness connector. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in TCC solenoid control circuit.
  6. Measure resistance of TCC solenoid control circuit (Orange/Black wire) between TCC solenoid harness connector and terminal No. 78 at PCM C2 harness connector. See Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Orange/Black wire.
  7. If no other possible causes are remaining, replace PCM.
  8. Conditions that set DTC are not present at this time. Perform the following to help identify intermittent condition:
    • With engine running at normal operating temperature, wiggle related wiring harness while monitoring related parameters on scan tool. If voltage changes or DTC sets while wiggling wiring harness, repair connectors or wiring harness where wiggling caused voltage to change or DTC to set.
    • Review freeze frame information on scan tool. Duplicate conditions present when DTC was set.
    • Refer to any Technical Service Bulletins (TSBs) that may apply.
    • Visually inspect related wiring harness. Check for chafed, pierced, pinched or partially broken wires.
    • Visually inspect related wiring harness connectors. Check for broken, bent, pushed out or corroded terminals.

    If a problem is found, repair as necessary. If no problems are found, test is complete.

scientia non olet · About LEMON Manuals