Inspection Procedure

Input signal check .
1. See step ) INPUT SIGNAL CHECK.
2. Check the indicator light operation when driving with vehicle speed above 40 km/h (25 mph) and below 40 km/h (25 mph).
  
  Fig 1: Displaying Indicator Light Operation Based On Vehicle Speed
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  1. Vehicle speed above 40 km/h (25 mph): indicator light blinks
  2. Vehicle speed below 40 km/h (25 mph): indicator light stays on
  3. OK: Check and replace cruise control ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE.
  4. NG: Go to next step.
Check speedometer circuit. See CIRCUIT .
1. OK: Go to next step.
2. NG: Repair or replace harness, connector or combination meter assembly.
Check harness and connector between cruise control ECU and combination meter, and combination meter and vehicle speed sensor. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
1. OK: Go to next step.
2. NG: Repair or replace harness or connector.
Check vehicle speed sensor. See INSPECTION .
1. OK: Check and replace cruise control ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
2. NG: Replace vehicle speed sensor.