DRL Relay Circuit

LIGHTING SYSTEM: DRL Relay Circuit

DRL Relay Circuit

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





(a) Disconnect the J29 relay connector.
(b) Disconnect the J3 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK MAIN BODY ECU





(a) Disconnect the J3 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPLACE MAIN BODY ECU
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE