DESCRIPTION The skid control ECU (brake actuator assembly) stores this DTC if malfunctions are found in a circuit inside the ECU by self diagnosis.
CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration. Click here
PROCEDURE
(a) Replace the skid control ECU (brake actuator assembly). Click here HINT: This DTC is output when the skid control ECU (brake actuator assembly) detects a malfunction in an internal circuit.
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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 ...
