Toyota Tundra Service Manual: System Description

Toyota Tundra Service Manual / Vehicle Interior / Door Lock / Key Reminder Warning System / System Description

SYSTEM DESCRIPTION

1. KEY REMINDER WARNING SYSTEM DESCRIPTION

(a) When the driver side door is opened with the ignition key in the ACC or LOCK position, this system causes a buzzer to sound in order to warn the driver that the ignition key has not been removed.

2. FUNCTION OF MAIN COMPONENT

Component	Function
Front Door Courtesy Switch LH	Detects front door status (open or closed) and outputs signal to main body ECU
Unlock Warning Switch	Detects if key is inserted into ignition key cylinder or not and outputs signal to main body ECU
Combination Meter	Receives buzzer request signal from main body ECU after main body ECU receives ignition switch signal and front door courtesy light switch signal, and actuates inner circuit to sound built-in buzzer intermittently

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Toyota Tundra Service Manual > Front Power Seat Control System(w/ Memory): Wireless-linked Return Function does not Operate
DESCRIPTION When a door is unlocked by the wireless unlock function, the main body ECU (multiplex network body ECU) receives the door unlock signal and it stores the key ID. When the driver door is opened, the memory call and memory command information of the stored key ID is sent to each driving po ...

Toyota Tundra Service Manual: System Description

Problem Symptoms Table

System Diagram

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