Diagnosis System

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION
The ECM controls the cruise control system of the vehicle. The data and DTCs relating to the cruise control system can be read from the DLC3 of the vehicle. If any DTC is not displayed when checking for DTCs, there may be a problem with either the combination meter or the CAN communication system. Use the Techstream to check and solve the problem.
CHECK DLC3
1. Check the DLC3 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
CHECK INDICATOR
1. Turn the ignition switch to ON.
  
  Fig 1: Identifying CRUISE Main Indicator Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the CRUISE main indicator light illuminates when the cruise control main switch is turned on, and that the indicator light turns off when the main switch is turned off. If the results are not as specified, inspect the CRUISE main indicator light circuit (See CRUISE MAIN INDICATOR LIGHT CIRCUIT ).
  
  Fig 2: CRUISE Main Indicator Light Illuminating Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  While driving with cruise control, the ECM activates AUTO CANCEL of the cruise control system when a malfunction occurs in one of the following: vehicle speed sensors, stop light switch, or other related parts. When AUTO CANCEL is activated, the CRUISE main indicator light outputs the blinking pattern as shown in the illustration. At the same time, data of the malfunction is stored as a DTC.