Hi,
Is this an intermittent problem or does the warning buzzer never work? When the ignition switch is OFF, the key is in the ignition key cylinder, and the driver side door is opened, the body ECU operates the combination meter to cause the buzzer to sound. (See pic 1 for schematic)
This could be related to a sticking door switch. Pay attention to see if the dome lights every fail to turn on.
Let me know.
Joe
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Sunday, March 8th, 2020 AT 5:33 PM