Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000012TY3
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 -           ]
Title: LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION; 2018 - 2024 MY Camry [03/2017 -        ]

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR

*a

Front view of wire harness connector

(to Automatic Light Control Sensor)

(a) Disconnect the M1 automatic light control sensor connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

M1-1 (CLTB) - M1-2 (CLTE)

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

Standard Resistance:

Tester Connection

Condition

Specified Condition

M1-2 (CLTE) - Body ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Connect the M1 automatic light control sensor connector.

(d) Connect an oscilloscope to terminals M1-2 (CLTE) and M1-4 (CLTS) of the automatic light control sensor connector and check the waveform.

*a

Component with harness connected

(Automatic Light Control Sensor)

*b

Waveform

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

M1-2 (CLTE) - M1-4 (CLTS)

Ignition switch ON

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

Pulse generation

(See waveform)

HINT:

The communication waveform changes according to the surrounding brightness.

If the result is not as specified, the automatic light control sensor may be malfunctioning.