Toyota CH-R Service Manual: On-vehicle Inspection

Toyota CH-R Service Manual / Lighting (ext) / Automatic Light Control Sensor / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Check the wire harness.

(1) Disconnect the automatic light control sensor (G1).

(2) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G1-1(CLTB) - G1-2(CLTE)

Ignition switch on (IG)

11 to 14 V

If the specified condition is not met, replace the vehicle wire harness.

*a

Front view of wire harness connector

(Automatic Light Control Sensor)

(b) Check the resistance.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

G1-2(CLTE) - Body ground

Always

Below 1 Ω

If the specified condition is not met, replace the vehicle wire harness.

(c) Check the automatic light control sensor.

(1) Connect the automatic light control sensor (G1).

(2) Check the waveform

Use the oscilloscope and check the waveform in the terminal spaces.

NOTICE:

With the connector connected as is, check from the rear side of the connector.

Standard:

Tester Connection

Switch Condition

Standard

G1-4(CLTS) - G1-2(CLTE)

Ignition switch on (IG), light control switch in AUTO position

Correct waveform is as shown

If the specified condition is not met, replace the solar sensor.

*a

Component with harness connected

(Automatic Light Control Sensor)

(3) Waveform

Item

Content

Terminal

G1-4(CLTS) - G1-2(CLTE)

Equipment Setting

2V/DIV.,10ms/DIV.

Condition

Ignition switch on (IG), head light dim switch in AUTO position

The communication waveform changes according to the surrounding brightness.
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