Last Modified: 06-02-2026 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.