Automatic Light Control Sensor Circuit

DESCRIPTION

The body ECU receives the signal from the automatic light control sensor.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. READ VALUE OF INTELLIGENT TESTER

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to the ON position and press the intelligent tester main switch ON.

3. Select the items below in the DATA LIST, and read the displays on the intelligent tester.

   BODY NO.1: 

   Item	Measurement Item/ Display (Range)	Normal Condition	Diagnostic Note
   Illumination Rate Info	Illumination rate/ON or OFF	ON: Illuminate rate ON OFF: Illuminate rate OFF	-

NG	Go to step 2

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

1. Disconnect the automatic light control sensor connector and multiplex network body ECU connector.

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

   Resistance:

   Tester connection	Condition	Specified condition
   CLTE (A13-3) - CLTE (B6-4)	Always	Below 1 Ω
   CLTS (A13-5) - CLTS (B6-5)	Always	Below 1 Ω
   CLTB (A13-6) - CLTB (B6-6)	Always	Below 1 Ω
   CLTE (B6-4) - Body ground	Always	10 kΩ or higher
   CLTS (B6-5) - Body ground	Always	10 kΩ or higher
   CLTB (B6-6) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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

   Voltage:

   Tester connection	Condition	Specified voltage
   CLTE (B6-4) - CLTB (B6-6)	Ignition switch OFF → ON	Below 1 V → 10 to 14 V

NG	PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

OK
REPLACE AUTOMATIC LIGHT CONTROL SENSOR