Low Beam Headlight Circuit (from 07/2011)

LIGHTING (EXT): LIGHTING SYSTEM (for Hatchback): Low Beam Headlight Circuit
- Low Beam Headlight Circuit

DESCRIPTION

The main body ECU controls the low beam headlights.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Main Body

OK:

Running light relay operates. (Low beam headlights illuminate.)

NG -- CHECK HEADLIGHT

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Lighting System (for Hatchback)

2. CHECK HEADLIGHT

(a) Check the operation of the high beam headlights.

OK:

High beam headlights operate normally.

NG -- GO TO PROBLEM SYMPTOMS TABLE Lighting System (for Hatchback)
OK -- Continue to next step.

3. INSPECT RUNNING LIGHT RELAY

(a) Remove the running light relay from the No. 2 engine room relay block.

(b) Connect the positive (+) lead from the battery to terminal 6 (+B).

(c) Connect the negative (-) lead from the battery to terminal 4 (H) and 3 (E).

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

Standard Voltage:

Text in Illustration

NG -- REPLACE RUNNING LIGHT RELAY Removal (from 07/2011)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - HEADLIGHT DIMMER RELAY AND BODY GROUND)

(a) Remove the running light relay from the No. 2 engine room relay block.

(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.

5. CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Remove the running light relay from the No. 2 engine room relay block assembly.

(b) Disconnect the 3C instrument panel junction block assembly 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.

6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

(b) Remove the main body ECU from the instrument panel junction block assembly.

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

Text in Illustration

Standard Resistance:

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK -- REPLACE MAIN BODY ECU Removal (from 07/2011)