Headlight (Hi-Beam) Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Headlight (HI-BEAM) Circuit
- Headlight (HI-BEAM) Circuit

DESCRIPTION

The main body ECU receives headlight dimmer switch information signals and illuminates the high beam headlights.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (HIGH BEAM HEADLIGHT)

(a) Using the Techstream, perform the Active Test Data List / Active Test.

Main Body





OK:

Relay operates (high beam headlights illuminate).

NG -- CHECK HARNESS AND CONNECTOR (BATTERY - RUNNING LIGHT RELAY)

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

2. CHECK HARNESS AND CONNECTOR (BATTERY - RUNNING LIGHT RELAY)

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





Standard Voltage:





Text in Illustration





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

3. CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the G47 main body ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System