Inspection INSPECTION PROCEDURE 1. INSPECT FUEL TANK CAP ASSEMBLY (a) Visually check if the cap and/or gasket are deformed or damaged.  Text in Illustration
If the result is not as specified, replace the fuel tank cap assembly or gasket.  NOTICE: Confirm that ID mark S is printed on the replacement fuel tank cap. Text in Illustration
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Toyota Tundra Service Manual > Sfi System: Brake Switch "A" / "B" Correlation (P0504)
DESCRIPTION The stop light switch is a duplex system that transmits two signals: STP and ST1-. These two signals are used by the ECM to monitor whether or not the brake system is working properly. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneo ...
