Headlight Beam Level Control ECU Communication Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Beam Level Control ECU Communication Circuit
- Headlight Beam Level Control ECU Communication Circuit

DESCRIPTION

The headlight beam level control ECU receives HEAD signal from the front controller and receives engine condition (ON or OFF) from the generator. It also receives vehicle speed signal from the skid control ECU, thus controlling the headlight beam level control motor.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT BEAM LEVEL CONTROL ECU)

(a) Disconnect connector 1H from the front controller.

(b) Disconnect the headlight beam level control 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 HARNESS AND CONNECTOR (SKID CONTROL ECU - HEADLIGHT BEAM LEVEL CONTROL ECU)

(a) Disconnect the headlight beam level control ECU connector and the skid control ECU connector.

(b) 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.

3. CHECK HARNESS AND CONNECTOR (GENERATOR ASSEMBLY - HEADLIGHT BEAM LEVEL CONTROL ECU)

(a) Disconnect connector B6 of the generator and connector A21 of the headlight beam level control ECU.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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