B1244 Malfunction of automatic light control sensor Open or short of automatic light control sensor circuit

DESCRIPTION

This DTC is output when failure in the light sensor circuit is detected.

DTC No.	DTC Detecting Condition	Trouble Area
B1244	Malfunction of automatic light control sensor Open or short of automatic light control sensor circuit	Automatic light control sensor Harness or connector Instrument panel junction block assembly

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	Illuminate rate/ON or OFF	ON: Illuminate rate ON OFF: Illuminate rate OFF	-

NG	Go to step 2

OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

2. CHECK HARNESS OR CONNECTOR (BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

1. Disconnect the automatic light control sensor connector and 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

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. REPLACE AUTOMATIC LIGHT CONTROL SENSOR

1. Return to normal operation.

NG	REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK
END