High Beam Headlight Circuit

LIGHTING (EXT): LIGHTING SYSTEM: High Beam Headlight Circuit
- High Beam Headlight Circuit

DESCRIPTION

The main body ECU controls the high beam headlights.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (HEADLIGHT)

(a) Using the Techstream, perform the Active Test Exterior Lighting System.

Main Body

OK:

High beam headlights illuminate.

NG -- INSPECT DRL RELAY

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

2. INSPECT DRL RELAY

(a) Remove the DRL relay.

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

Standard Voltage:

NG -- REPLACE DRL RELAY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (DRL RELAY - BATTERY AND BODY GROUND)

(a) Remove the DRL relay.

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

Standard Voltage:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (DRL RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Remove the DRL relay.

(b) Disconnect the 2B instrument panel junction block 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.

5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly Removal.

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

Standard Resistance:

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System