Diagnosis System

The ECU 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 either DTC or CRUISE OK is not displayed on the multi-information display on the combination meter when checking for DTCs, there may be a problem with either the combination meter or the CAN communication and multiplex communication systems Use the Techstream to check and solve the problem

1. Check the DLC3 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS )

1. Turn the engine switch on (IG).
   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: Identifying Cruise Main Indicator Light Blinking Pattern

   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 shown in the illustration At the same time, data of the malfunction is stored as a DTC