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No Lock-Up

  1. Warm engine to normal operating temperature. Connect voltmeter between terminals TT and E1 of DLC connector. Refer to the Figure and Figure .
  2. Road test vehicle and ensure voltage at terminal TT is 7 volts in lock-up range. See GEAR SIGNAL under ELECTRICAL TESTING. If voltage is correct, lock-up solenoid, torque converter or transmission is defective.
  3. If voltage is not as specified, access ECT ECU. Refer to the Figure-Figure . Connect voltmeter between terminals B/K and E1 on ECT ECU with connector connected. See Figure.
  4. No voltage should exist with brake pedal released. Approximately 10-14 volts should exist with brake pedal depressed. If voltage is not as specified, check for defective brakelight switch or wiring circuit.
  5. If voltage is as specified, check for defective ECT ECU power source or ground connections. See appropriate wiring diagram in WIRING DIAGRAMS. Check for short or open circuit in wire to TT terminal of check connector. Check for defective throttle position sensor or wiring. See THROTTLE POSITION SENSOR (TPS) COMPONENT TEST  under COMPONENT TESTING.
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