DESCRIPTION The ECM illuminates the cruise control SET indicator by sending indicator output demand signals to the combination meter assembly via CAN communication. The cruise control SET indicator illuminates when the cruise control system is controlling vehicle speed. The cruise SET indicator light circuit uses CAN communication. If the cruise control SET indicator is not functioning correctly, check for CAN communication DTCs before troubleshooting this circuit. CAUTION / NOTICE / HINT CAUTION: Observe the following items for safety reasons when using the Techstream:
NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Combination Meter / Active Test. (e) Perform the Active Test according to the display on the Techstream. Body Electrical > Combination Meter > Active Test
(a) Turn the cruise control system on using the cruise control main switch (ON-OFF button). (b) Drive at a speed between approximately 40 km/h (25 mph) and 200 km/h (125 mph). (c) Enter the following menus: Powertrain / Cruise Control / Data List. (d) Read the Data List according to the display on the Techstream. Powertrain > Cruise Control > Data List
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Toyota Tundra Service Manual > Dynamic Radar Cruise Control System: Communication Error from ECM to VSC (P1631)
DESCRIPTION The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. Therefore, if t ...