B1244

LIGHTING: LIGHTING SYSTEM: B1244: Light Sensor Circuit Malfunction
B1244 - Light Sensor Circuit Malfunction

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)





(a) Disconnect the E16 main body ECU connector.

(b) Disconnect the F2 automatic light control sensor connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

2. CHECK OPERATION OF AUTOMATIC LIGHT CONTROL SENSOR

(a) Replace the automatic light control sensor with a normally functioning one or a new one.

(b) Check for DTCs.

OK:

DTC is not output.

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

OK -- REPLACE AUTOMATIC LIGHT CONTROL SENSOR