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Test C: Torque Converter Clutch Solenoid

WARNING: This page is about a different car, the 2002 Ford Escape, 2001 Mazda Tribute, and 2001 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Ensure all EEC-V systems are working properly and DTCs are no longer present.
  1. Ensure transaxle harness connector is in acceptable condition. Repair as necessary. Ensure transaxle harness connector is fully seated. Connect NGS tester or equivalent to DLC. Perform KEY ON ENGINE OFF (KOEO) SELF-TEST  until continuous memory codes have been displayed. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Enter output test mode. See ADDITIONAL SYSTEM FUNCTIONS  under SELF-DIAGNOSTIC SYSTEM. Select ALL ON mode. Push START to turn outputs on. Push STOP to turn outputs off. If vehicle enters output test mode, remain in output test mode and go to next step. If vehicle will not enter output test mode, see SCAN TOOL UNABLE TO COMMUNICATE  under SELF-DIAGNOSTIC SYSTEM.
  2. Disconnect transaxle harness connector. Inspect condition of connector and repair as needed. Using DVOM, connect positive lead to transaxle harness connector terminal No. 1 and negative lead to terminal No. 7. See Figure . While monitoring DVOM, press START and STOP to cycle TCC solenoid output on and off. If voltage changes at least .5 volt, go to step  5 . If voltage is unaffected, go to next step.
  3. Ensure ignition switch is turned to OFF position. Disconnect PCM 104-pin connector, and inspect it for damaged terminals, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pin No. 80 (Cougar) or No. 54 (Escape and Tribute) and transaxle harness connector terminal No. 7. See Figure . Measure and record resistance between test pins No. 71 and 97, and transaxle harness connector terminal No. 1. If each resistance is less than 5 ohms, go to next step. If any resistance is 5 ohms or more, repair open circuit. Connect all components. Disconnect breakout box and clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  4. Measure and record resistance between test pin No. 80 (Cougar) or No. 54 (Escape and Tribute) and test pins No. 71 and 97. Measure and record resistance between test pin No. 80 (Cougar) or No. 54 (Escape and Tribute) and test pins No. 24, 51, 77, 91, 103 and ground. If each resistance is more than 10 k/ohms, go to next step. If any resistance is 10 k/ohms or less, repair short circuit. Connect all components. Disconnect breakout box and clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  5. Connect transmission tester. Perform TCC solenoid functional test. See transmission tester instructions. Press TCC switch. If solenoid activates (Green LED on), go to next step. If LED turns Red (shorted to VPWR) or if solenoid does not activate LED (shorted to ground or open circuit), go to step  7 .
  6. Connect PCM 104-pin connector. Perform test drive using transmission tester. If TCC does not activate and engine RPM does not decrease when operated by transmission tester, go to next step. If TCC activates and engine RPM decreases when operated with transmission tester, replace PCM. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. Disconnect breakout box and clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. If symptoms still exist, see appropriate SYMPTOM DIAGNOSIS under TROUBLE SHOOTING  .
  7. Set transmission tester BENCH/DRIVE switch to BENCH position. Set solenoid select switch to OHMS CHECK. Measure resistance between TCC solenoid jack and VPWR jack on transmission tester. If resistance is 12.5-19.0 ohms, go to next step. If resistance is not 12.5-19.0 ohms, replace faulty transmission control solenoid body assembly. See appropriate AUTOMATIC article in TRANSMISSION SERVICING. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM.
  8. Check continuity between BAT (-) jack and TCC jacks on transmission tester. If continuity exists, replace faulty transmission control solenoid body assembly. See appropriate AUTOMATIC article in TRANSMISSION SERVICING. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. If continuity does not exist, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. See appropriate SYMPTOM DIAGNOSIS under TROUBLE SHOOTING  .
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