ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT BRAKE BOOSTER ![]() (a) OPERATING CHECK (1) Depress the brake pedal several times with the engine off and check that there is no change in the pedal reserve distance. (2) Depress the brake pedal and start the engine. If the pedal goes down slightly, operation is normal.
2. CHECK BRAKE VACUUM CHECK VALVE ASSEMBLY (a) Check the check valve. (1) Slide the clip and disconnect the vacuum hose. (2) Remove the check valve from the booster.
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Toyota Tundra Service Manual > Automatic Transmission System: Shift Solenoid "B" Performance (Shift Solenoid Valve S2) (P0756)
DESCRIPTION The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid val ...