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NTC-3: Speed Control On/Off Switch

Possible Causes

  1. Turn ignition on. Using scan tool, read S/C switch voltage. If voltage is more than 4 volts, go to next step. If voltage is 4 volts or less, go to step  4.
  2. Disconnect S/C ON/OFF switch. Inspect connectors. Clean or repair as necessary. Using a voltmeter, check voltage on S/C switch signal circuit. If voltage is more than 6 volts, repair short to voltage. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is less than 4 volts, repair high resistance or open circuit. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is 4-6 volts, go to next step.
  3. Turn ignition off. Connect a jumper wire between S/C switch signal circuit and ground. Turn ignition on. Using scan tool, read S/C switch voltage. If voltage is less than one volt, replace S/C ON/OFF switch. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is one volt or more, replace PCM. Perform TEST VER-4A  under VERIFICATION TESTS.
  4. Disconnect S/C ON/OFF switch. Inspect connectors. Clean or repair as necessary. Turn ignition on. Using scan tool, read S/C switch voltage. If voltage is more than 4 volts, replace S/C ON/OFF switch. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is 4 volts or less, go to next step.
  5. Disconnect S/C RESUME/ACCEL switch. Using scan tool, read S/C switch voltage. If voltage is more than 4 volts, replace RESUME/ACCEL switch. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is 4 volts or less, go to next step.
  6. Disconnect clockspring connector. Inspect connectors. Clean or repair as necessary. Using scan tool, read S/C switch voltage. If voltage is more than 4 volts, replace clockspring. Perform TEST VER-4A  under VERIFICATION TESTS. If voltage is 4 volts or less, go to next step.
  7. Turn ignition off. Disconnect PCM. Inspect connectors. Clean or repair as necessary. Using an ohmmeter, check resistance between ground and S/C switch signal circuit. If resistance is less than 5 ohms, repair short to ground. Perform TEST VER-4A  under VERIFICATION TESTS. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-4A  under VERIFICATION TESTS.
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