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CHRYSLER Corp. Thermal Ignition Control (Tic) Valve: Testing

  1. Start engine and warm to normal operating temperature. Remove TIC wiring connector at switch. Using ohmmeter, connect one lead to switch terminal and other lead to ground.
  2. Switch should be open and have no continuity below 235°F. Cover radiator to increase engine coolant temperature. Avoid overheating engine.
  3. Idle engine until coolant temperature is approximately 235°F. Read ohmmeter again, switch should be closed and have continuity. If switch fails either test, replace switch.
    NOTE: For vacuum hose routings of the TIC valve, refer to "Chrysler Corp. Vacuum Diagrams" in this section.
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