Diamante ES Sedan V6-3.5L SOHC (1997)
Key Cylinder Lamp: Description and Operation
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When, with the ignition switch turned to the OFF position, the driver's door is opened (door switch is switched ON), the ETACS-ECU timer circuit
is activated, the ETACS-ECU sends a signal to the instrument panel ECU which switches the ignition key hole illumination light on for 10
seconds.
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When the ignition switch is turned to the ON position while the timer circuit is activated, the key hole illumination light is switched off.