DTC B10A6-64: Main Light Switch Signal Plausibility Failure: Contents

DTC No.	Detection Item	DTC Detection Condition	Warning Indicate	Memory	Fail-safe Operation	Note
B10A664	Main Light Switch signal plausibility failure	Headlight dimmer switch error signal received	Not applicable	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type:CMDTC self test, ODDTC self test

Description	Headlight dimmer switch error signal received
Detection condition	Main body ECU receives error signals from the engine stop and start ECU for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	Exterior lighting system Turn the TNS (Parking Lights) and headlights LO on, and turn off other exterior light controls.
Possible cause	Engine stop and start ECU malfunction Headlight dimmer switch malfunction Main body ECU malfunction