Automatic Light Control Sensor On-Vehicle Inspection

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200

Lighting (Ext). Land Cruiser. Urj200, 202 Grj200 Vdj200

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Automatic Light Control Sensor -- On-Vehicle Inspection

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Disconnect the automatic light control sensor connector.

Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Automatic Light Control Sensor On-Vehicle Inspection

Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Switch Condition
Specified Condition
F91-2 (CLTE) - Body ground
Always
Below 1 Ω
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
F91-1 (CLTB) - F91-2 (CLTE)
Engine switch off
Below 1 V
Engine switch on (IG)
11 to 14 V
If the result not as specified, repair or replace the wire harness.
Text in Illustration
*a
Front view of wire harness connector
(Automatic Light Control Sensor)

Reconnect the automatic light control sensor connector.

Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Automatic Light Control Sensor On-Vehicle Inspection

Connect an oscilloscope to the automatic light control sensor connector.

Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Automatic Light Control Sensor On-Vehicle Inspection

Check the waveform.
Waveform:
Tester Connection
Tool Setting
Condition
Specified Condition
F91-4 (CLTS) - F91-2 (CLTE)
2 V/DIV., 10 msec./ DIV.
Engine switch on (IG), Light control switch in AUTO
Correct waveform is as shown
HINT:
The communication waveform changes according to the surrounding brightness.
If the result is not as specified, replace the automatic light control sensor.
Text in Illustration
*a
Component with harness connected
(Automatic Light Control Sensor)