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Home >> Eagle >> 1998 >> Talon Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Self-Diagnostics - With Codes >> DTC Test >> Test TC-15C: Speed Control Power Relay Circuit & Speed Control Solenoid Circuits
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Test TC-15C: Speed Control Power Relay Circuit & Speed Control Solenoid Circuits

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
  1. Disconnect speed control servo 4-pin connector. Turn ignition on. Put speed control on/off switch in ON position. DO NOT depress brake pedal during testing. Using a voltmeter, check voltage of speed control servo connector Dark Blue/White wire. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, see appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
  2. Using an ohmmeter, check resistance of speed control servo connector Black wire. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open Black wire. Perform TEST VER-4A .
  3. Turn ignition off. Reconnect speed control servo connector. Disconnect Powertrain Control Module (PCM) connectors. Turn ignition on. Using a voltmeter, check voltage of PCM connector terminal No. 56 (Light Green/White wire). Record voltage. Using a voltmeter, check voltage of PCM connector terminal No. 80 (Black/Yellow wire). If voltage on both circuits is more than 9 volts, replace PCM. Perform TEST VER-4A . If voltage on both circuits is 9 volts or less, go to next step.
  4. Turn ignition off. Disconnect speed control servo 4-pin connector. Using an ohmmeter, check resistance of speed control servo connector Light Green/White wire. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Light Green/White wire. Perform TEST VER-4A .
  5. Using an ohmmeter, check resistance of speed control servo connector Black/Yellow wire. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Black/Yellow wire. Perform TEST VER-4A .
  6. Using an ohmmeter, check resistance of speed control vacuum solenoid control circuit Light Green/White wire between speed control servo connector and Powertrain Control Module (PCM) connector terminal No. 56. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open Light Green/White wire. Perform TEST VER-4A .
  7. Using an ohmmeter, check resistance of speed control vent solenoid control circuit Black/Yellow wire between speed control servo connector and PCM connector terminal No. 80. If resistance is less than 5 ohms, replace speed control servo. Perform TEST VER-4A . If resistance is 5 ohms or more, repair open Black/Yellow wire. Perform TEST VER-4A .
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