Auto-On Headlight Sensor Inspection (If Equipped)

Remove auto-on headlight sensor (1) located on the passenger side of the dashboard (3). Be careful not to damage the sensor (1) and dashboard by using rag (2).

Fig 1: Removing Auto-On Headlight Sensor
Courtesy of SUZUKI OF AMERICA CORP.
Measure voltage between pink/blue wire terminal and black wire terminal at the following condition. If measured voltage is out of specification, replace sensor.
Auto-on headlight sensor voltage specifications

Cover the sensor lens with hand: 0.4 V

Light the sensor lens with incandescent light 100 W: 3 - 4.5 V

Fig 2: Measuring Voltage Between Pink/Blue Wire Terminal And Black Wire Terminal
Courtesy of SUZUKI OF AMERICA CORP.