Check code 04

Inspection item	Step	Inspection	Display	Action
Light switch OFF/TNS input signal	1	Turn light switch to TNS position	Courtesy of MAZDA MOTORS CORP.	The input signal is normal. Go to the next step.
	1	Turn light switch to TNS position	Courtesy of MAZDA MOTORS CORP.	Go to Step 3.
	2	Switch light switch off	Courtesy of MAZDA MOTORS CORP.	Go to Step 4.
	2	Switch light switch off	Courtesy of MAZDA MOTORS CORP.	The input signal to the information display is normal.
	3	Inspect the information display. Measure the voltage of information display terminal C. (See INFORMATION DISPLAY INSPECTION .) Is the voltage B+?		Yes	Replace the information display.
	3			No	Inspect for an open or short circuit in the light switch related wiring harness, poor connection or terminal disconnection of the connector. If there is any malfunction, repair or replace the malfunctioning location.
	4	Inspect the information display. Measure the voltage at information display terminal C. (See INFORMATION DISPLAY INSPECTION .) Is the voltage 1.0 V or less?		Yes	Replace the information display.
	4			No	Inspect for an open or short circuit in the light switch related wiring harness, poor connection or terminal disconnection of the connector. If there is any malfunction, repair or replace the malfunctioning location.