Daytime Running Light Relay Circuit

LIGHTING: LIGHTING SYSTEM: Daytime Running Light Relay Circuit
- Daytime Running Light Relay Circuit

DESCRIPTION

This function is designed to automatically illuminate the headlights (HI-beams), during the daytime to make the car more visible to other vehicles. The main body ECU and power distributor control this function. The main body ECU transmits a turn ON signal to the power distributor and the power distributor illuminates the HI-beams using duty control. The daytime running lights come on when the conditions below are met:

* The ignition switch is ON.

* The READY condition signal is input.

* The parking brake switch is OFF.

* The light control switch is not in DRL OFF.*1

* The light control switch is in the OFF*2, TAIL or AUTO position and the headlights are not turned on via the automatic light control.

* *1: w/ DRL OFF Switch

* *2: for Canada

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HEADLIGHT

(a) Check the operation of the HI-beam headlights.

OK:

HI-beam headlights operate normally.

NG -- GO TO PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures
OK -- Continue to next step.

2. INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY

(a) Remove the engine room junction block assembly from the engine room relay block.





(b) Connect a positive (+) lead from the battery to terminal 2D-1.

(c) Connect a negative (-) lead from the battery to terminals 2A-5, 2A-17 and 2B-8.

(d) Check for pulses according to the value(s) in the table below.

Standard:





NG -- REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures