On-Vehicle Inspection

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

Inspection of the automatic light control sensor

Sensor power supply

Disconnect the connector D45 of the automatic light control sensor.

Measure the voltage according to the following chart.

Voltage

Inspection terminals (Terminal symbol)	Inspection conditions	Standard value
D45-3 (CLTB) - D45-6 (CLTE)	IG OFF →IG ON	11 to 14V

Measure the resistance according to the following chart.

Resistance

Inspection terminals (Terminal symbol)	Inspection conditions	Standard value
D45-6 (CLTE) - chassis ground	Always	Less than 1 Ω

Fig 1: Automatic Light Control Sensor Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

Sensor waveform

Connect the connector D45 of the automatic light control sensor.
Using a oscilloscope, inspect if a waveform is occurring between the terminals.
CAUTION: With the connectors connected, perform this inspection from the rear of the connectors.

NOTE: Match the oscilloscope settings with chart 1.

Fig 2: Identifying Automatic Light Control Sensor Connector Teminals With Waveform
Courtesy of SUBARU OF AMERICA, INC.

Chart 1

Item	Contents
Measuring terminal	D45-4 (CLTS) - D45-6 (CLTE)
Equipment setting	5 V/DIV, 5 ms/DIV
Measuring conditions	IG ON, light control switch is AUTO, automatic light control sensor is covered by something that doesn't let light through →exposed

Standard value (waveform)

Inspection terminals (Terminal symbol)	Inspection conditions	Standard value
D45-4 (CLTS) - D45-6 (CLTE)	IG ON, light control switch is AUTO, automatic light control sensor is covered by something that doesn't let light through →exposed	Shown in the figure

NOTE: The brighter the area becomes, the shorter the A interval becomes.