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 (dimmed low 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 LO-beams using a duty control.

The daytime running lights come on when the conditions given below are met:

* Ignition switch on (IG).

* Engine speed signal input (engine running condition).

* Parking brake switch is OFF.

* Light control switch is not in DRL OFF.

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HEADLIGHT

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

OK:

LO-beam headlights and 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 the positive (+) lead from the battery to terminal 2G-1.

(c) Connect the negative (-) lead from the battery to terminal 2D-8 and 2E-11.

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

Standard voltage:





NG -- REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY

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