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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Engine Controls - Tests W/Codes - 5.9L Diesel) >> Self-Diagnostic Tests >> Test TC-15A - Torque Converter Clutch Solenoid Circuit

Test TC-15A - Torque Converter Clutch Solenoid Circuit

WARNING: This page is about a different car, the 1995 Dodge Pickup and 1995 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  section at the end of this article.
  1. Using scan tool, erase DTCs. Using scan tool, actuate Torque Converter Clutch (TCC) solenoid. Wait 10 seconds. Using scan tool, read DTCs. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT DTC returns, go to step 5). If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT DTC does not return, condition required to set DTC is not present at this time. Go to next step.
  2. TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT DTC sets if solenoid or relay control circuit (Orange/Black wire) is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted solenoid or relay control circuit (Orange/Black wire), open or shorted solenoid or relay coil, or open 12-volt feed circuit (Light Green/Black wire) to solenoid or relay. Go to next step.
  3. Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-1. If no problems are found with wiring or connectors, go to next step.
  4. Using scan tool, read DTCs. TCC actuation test should still be running. Wiggle wiring harness from TCC solenoid relay to PCM. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT DTC returns, repair wiring harness as necessary. Perform TEST VER-1. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT DTC does not return, test is complete. Perform TEST VER-1.
  5. Disconnect TCC solenoid connector. Using scan tool in voltmeter mode, check voltage on TCC solenoid connector ignition feed circuit (Light Green/Black wire). If voltage is less than 10 volts, repair open Light Green/Black wire. Perform TEST VER-1.
  6. If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 54, TCC solenoid control circuit (Orange/Black wire). If resistance is less than 5 ohms, repair short to ground in Orange/Black wire. Perform TEST VER-1.
  7. If resistance is more than 5 ohms, use an external ohmmeter to check resistance of TCC solenoid control circuit (Orange/Black wire) between PCM connector terminal No. 54 and TCC solenoid connector. If resistance is more than 5 ohms, repair open Orange/Black wire. Perform TEST VER-1.
  8. If resistance is less than 5 ohms, reconnect TCC solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 54, TCC solenoid control circuit (Orange/Black wire). If voltage is more than 10 volts, replace PCM. Perform TEST VER-1. If voltage is less than 10 volts, replace TCC solenoid. Perform TEST VER-1.
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