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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Engine Controls - Tests W/Codes - 5.9L Gasoline) >> Self-Diagnostic Tests >> Test TC-35A - Torque Converter Clutch Solenoid Circuit

Test TC-35A - Torque Converter Clutch Solenoid Circuit

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 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 diagram, see WIRING DIAGRAMS  section at the end of this article.
  1. Using scan tool, erase trouble codes. On models with overdrive switch on instrument panel, go to TEST TC-35B. On models without overdrive switch on instrument panel, use scan tool to actuate Torque Converter Clutch (TCC) relay. If TCC relay does not click, go to step 5). If TCC relay clicks, condition required to set trouble code is not present at this time. Go to next step.
  2. TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT trouble code sets if an open or short is detected in solenoid control circuit (Orange/Black wire). Possible causes are: open or shorted solenoid or relay control circuit (Orange/Black wire), open or shorted solenoid or relay coil, or open fused ignition switch output circuit (Dark Blue wire) to solenoid or relay. Go to next step.
  3. Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-2. If no problems are found with wiring or connectors, go to next step.
  4. Using scan tool, read trouble codes. TCC actuation test should still be running. Wiggle wiring harness from TCC solenoid relay to PCM. If TCC RELAY CONTROL CIRCUIT trouble code returns, repair wiring harness as necessary. Perform TEST VER-2. If TCC RELAY CONTROL CIRCUIT trouble code does not return, test is complete. Perform TEST VER-2.
  5. Disconnect TCC relay connector. Using scan tool in voltmeter mode, check voltage on TCC solenoid connector terminal "A", fused ignition switch output circuit (Dark Blue wire).
  6. If voltage is less than 10 volts, repair open Dark Blue wire. Perform TEST VER-2. 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).
  7. If resistance is less than 5 ohms, repair short to ground in Orange/Black wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  8. Using an external ohmmeter, 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-2. If resistance is less than 5 ohms, reconnect TCC solenoid connector. Turn ignition on.
  9. 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-2. If resistance is less than 10 volts, replace TCC relay. Perform TEST VER-2.
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