B2480

LIGHTING: LIGHTING SYSTEM: B2480,B2481: Headlight Hi LH Circuit Transistor
B2481 - Headlight Hi RH Circuit Transistor

DESCRIPTION

The multiplex network front light ECU (front controller) illuminates and turns off the headlight HI beam.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT)

(a) Using the Techstream, read the Data List.

Body No. 5





OK:

Normal condition listed above is displayed.

NG -- CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK FRONT LIGHT ECU - HEADLIGHT)

OK -- REPLACE MULTIPLEX NETWORK FRONT LIGHT ECU

2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK FRONT LIGHT ECU - HEADLIGHT)





(a) Disconnect the B14 ECU connector.

(b) Disconnect the B1 and B11 light connectors.

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

Standard resistance:

for LH
for RH










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

3. CHECK NO. 1 HEADLIGHT BULB (OPERATION)

(a) Temporarily replace the No.1 headlight bulb with a new or normally functioning one.

HINT
* for HID Headlight Disassembly.
* for LED Headlight Disassembly.

(b) Check for DTC Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B2480 or B2481 output does not occur.

Result





C -- END (REPLACE NO. 1 HEADLIGHT BULB) Disassembly

B -- END (REPLACE NO. 1 HEADLIGHT BULB) Disassembly
A -- Continue to next step.

4. CHECK HEADLIGHT ASSEMBLY (OPERATION)

(a) Temporarily replace the headlight with a new or normally functioning one.

HINT
* for HID Headlight Removal.
* for LED Headlight Removal.

(b) Check for DTC Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B2480 or B2481 output does not occur.

Result





C -- END (REPLACE HEADLIGHT ASSEMBLY) Removal

B -- END (REPLACE HEADLIGHT ASSEMBLY) Removal

A -- REPLACE MULTIPLEX NETWORK FRONT LIGHT ECU