Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001EPGK
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 -           ]
Title: LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION; 2019 - 2025 MY RAV4 RAV4 HV [11/2018 -        ]

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Disconnect the automatic light control sensor connector.

*a

Front view of wire harness connector

(to Automatic Light Control Sensor)

(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

H1-1 (CLTB) - H1-2 (CLTE)

Ignition switch on (IG)

11 to 14 V

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-2 (CLTE) - Body ground

Always

Below 1 Ω

If the result is not as specified, repair or replace the wire harness or connector.

(c) Reconnect the automatic light control sensor connector.

*a

Component with harness connected

(Automatic Light Control Sensor)

(d) Connect an oscilloscope to the automatic light control sensor connector.

(e) Check the waveform.

OK:

Tester Connection

Tool Setting

Condition

Specified Condition
If the result is not as specified, replace the automatic light control sensor.

H1-4 (CLTS) - H1-2 (CLTE)

2 V/DIV., 10 ms./DIV.

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

Correct waveform is as shown

HINT:

The communication waveform changes according to the surrounding brightness.