DTC    B1244    Light Sensor Circuit Malfunction

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DESCRIPTION

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

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

WIRING DIAGRAM


B110585E03


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

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

  1. 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)


    B113770E01

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

  1. 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