DESCRIPTION The brake pedal load sensing switch turns on when the brake pedal is depressed with a force exceeding a predetermined level. The skid control ECU uses this circuit to detect if the brake pedal is depressed or not.
WIRING DIAGRAM  CAUTION / NOTICE / HINT HINT: When
C1249, C1425 and/or C1426 is output together with C1429, inspect and
repair the trouble areas indicated by C1249, C1425 and/or C1426 first:
(Click here PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Select the Data List using the Techstream. Click here
(d) Check that the brake pedal load sensing switch display observed on the Techstream changes according to brake pedal operation. OK: The Techstream displays ON or OFF according to brake pedal operation.
(a) Turn the ignition switch off. (b) Clear the DTCs. Click here (c) Turn the ignition switch off. (d) Start the engine. (e) Perform a road test. (f) Check if the same DTC is output. Click here
(a) Turn the ignition switch off. (b) Inspect the brake pedal load sensing switch (brake pedal support assembly). Click here OK: The brake pedal load sensing switch (brake pedal support assembly) is normal.
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. (b) Disconnect the A57 skid control ECU (brake actuator assembly) connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Automatic Transmission System: Definition Of Terms
DEFINITION OF TERMS Term Definition Monitor description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details). Related DTCs Group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. Typical enabling ...
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