DRL Relay Circuit

LIGHTING (EXT): LIGHTING SYSTEM: DRL Relay Circuit
- DRL Relay Circuit

DESCRIPTION

The daytime running light relay is built into the turn signal flasher assembly.

When the daytime running light relay receives the ignition switch ON signal from the main body ECU, the turn signal flasher assembly illuminates the turn signal lights. When the daytime running light relay receives the headlight dimmer switch signal, the turn signal flasher assembly turns off the turn signal lights.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT MAIN BODY ECU

(a) Disconnect the H3 main body ECU connector.





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

Standard Voltage:





NG -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER ASSEMBLY - MAIN BODY ECU)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

2. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the H39 turn signal flasher assembly connector.





(b) Disconnect the H3 main body ECU connector.

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

Standard Resistance:





(d) Reconnect the main body ECU connector.

(e) Reconnect the turn signal flasher assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TURN SIGNAL FLASHER ASSEMBLY Removal