OPERATION CHECK 1. CHECK KEY REMINDER WARNING SYSTEM (a) Check that the key reminder warning buzzer sounds. (1) With the driver side door closed, insert the key into the ignition key cylinder and then turn the key to the LOCK or ACC position. (2) Check that the buzzer sounds intermittently if the driver side door is opened. (b) Check that the key reminder warning buzzer stops. (1) Check that the buzzer stops sounding when any of the following operations is performed while the buzzer is sounding:
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Toyota Tundra Service Manual > Automatic Transmission System: Shift Solenoid "D" Performance (Shift Solenoid Valve S4) (P0766,P0776)
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 ...
