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Checking Input Signals

  1. To check input signals for switches, go to next step. To check input signals for vehicle speed sensor, go to step  3.
  2. Leave ignition on. Operate appropriate switch as specified (SET/COAST, step No. 1; RES/ACC, step No. 2; CANCEL, stoplight and park/neutral position, step No. 3), and observe CRUISE indicator light. See Figure. If CRUISE indicator light flashes as specified, related switch circuit is okay. If CRUISE indicator light does not flash as specified, go to step  4.
  3. Operate vehicle at specified speed (greater or less than 25 MPH; step No. 4), and observe CRUISE indicator light. See Figure. If CRUISE indicator light flashes as specified, vehicle speed sensor circuit is okay. If CRUISE indicator light does not flash as specified, go to next step.
  4. Cruise control ECU is not receiving input signal due to a faulty circuit. Repair circuit as necessary. If circuit is okay, check cruise control ECU. See CRUISE CONTROL ECU PIN VOLTAGE TESTS  under COMPONENT TESTS. If cruise control ECU is defective, replace ECU. Exit diagnostic mode. See EXITING DIAGNOSTIC MODE .
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