DESCRIPTION The trailer brake control ECU (brake control with bracket relay) receives signals from the skid control ECU (brake actuator assembly), yaw rate and acceleration sensor (airbag sensor assembly) and combination meter assembly via CAN communication.
PROCEDURE
(a) Clear the DTCs. Click here
(b) Turn the ignition switch off. (c) Turn the ignition switch to ON. (d) Check if the same DTC is output. Click here HINT: If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor malfunction DTC.
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Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: 4WD Control Switch Circuit
WIRING DIAGRAM PROCEDURE 1. CONFIRM PROBLEM SYMPTOM (a) Confirm the problem symptoms. Result Result Proceed to The 4HI and 4LO indicator lights are not illuminated A The 4HI indicator light is illuminated and the 4LO indicator light is not illuminated B The 4HI indicator light is not illuminated and ...