DESCRIPTION The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication. CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Check if CAN communication system DTCs are output. Click here
(a) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test. ABS/VSC/TRAC
(b) Check the operating condition of the brake warning light when operating it using the Techstream.
(a) Enter the following menus: Body Electrical / Combination Meter / Active Test. Click here (b) Perform the Active Test of the combination meter assembly using the Techstream. (c) Check the combination meter assembly. OK: The brake warning light turns on or off in accordance with the Techstream operation.
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Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Fail-safe Chart
FAIL-SAFE CHART TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM DTC NO. Fail-safe Operation Fail-safe Deactivation Condition U0100 Prohibits switching to 4L or switching from 4L for all shift positions CAN communication signal from ECM is received U0122 Prohibits all switching except from 4H to 2WD CAN communi ...