Headlight Solenoid Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Solenoid Circuit
- Headlight Solenoid Circuit

DESCRIPTION

This Bi-function is activated by the front controller. The front controller receives a HI beam turn ON signal from the main body ECU RH and activates the headlight solenoid built into the headlight unit to slide the shade down.

When the LO beam headlight is switched on, the upper illumination area of the discharge bulb is blocked by the shade and only the lower illumination area is used. When the HI beam is turned on, the headlight solenoid slides the shade down to allow use of the upper illumination area, thus increasing the illumination area and improving visibility when the HI beam is on.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Body No. 5 / Active Test.

(e) Check the operation.

Body No. 5 (Front Controller)

Body No. 5 (Front Controller):

OK:

Headlight (HI) comes on.

NG -- CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - FRONT CONTROLLER)

OK -- REPLACE HEADLIGHT ASSEMBLY

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - FRONT CONTROLLER)

(a) Disconnect the B2 or B12 headlight assembly connector.





(b) Turn the light control switch to the ON (HEAD) position.

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

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT ASSEMBLY)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - BODY GROUND)

(a) Disconnect the B2 or B12 headlight assembly connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HEADLIGHT ASSEMBLY

4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT ASSEMBLY)

(a) Disconnect the 2G engine room J/B No. 2 connector.





(b) Disconnect the B2 or B12 headlight assembly connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ENGINE ROOM NO. 2 R/B (FRONT CONTROLLER)