LIGHTING SYSTEM > Headlight Beam Level Control ECU Power Source Circuit

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DESCRIPTION

This circuit provides power to operate the headlight beam level control ECU.

WIRING DIAGRAM


B110607E01


INSPECTION PROCEDURE

1.INSPECT FUSE

  1. Inspect the ECU-IG No.2 fuse in the instrument panel junction block assembly.

    Resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


2.INSPECT RELAY


    E064835

  1. Inspect IG1 relay continuity.

    1. Remove the IG1 relay from the instrument panel J/B assembly.

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

      Resistance:
      Tester connection
      		Condition
      		Specified resistance
      3 - 5
      		Always
      		10 kΩ or higher
      3 - 5
      		Apply B+ between the terminal 1 and 2
      		Below 1 Ω



NG
REPLACE RELAY
OK


3.INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU


    B110648E02

  1. Disconnect the H17 connector of headlight beam level control ECU.

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

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    H17-14 (IG) - H17-1 (GND)
    		Ignition switch OFF → ON
    		Below 1 V → 10 to 14 V



NG
Go to step 4
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

4.CHECK HARNESS AND CONNECTOR (HEADLIGHT BEAM LEVEL CONTROL ECU - BODY GROUND)


    B110648E03

  1. Disconnect the H17 connector of headlight beam level control ECU.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    H17-1 (GND) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE CIRCUIT)


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


    E068612E03

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1A-1 - Body ground
    		Always
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL J/B ASSEMBLY)
OK


6.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068612E04

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1F-19 - Body ground
    		Ignition switch OFF → ON
    		Below 1 V → 10 to 14 V



NG
Go to step 7
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - LEVEL CONTROL ECU) 

7.INSPECT IGNITION SWITCH


    E068971E01

  1. Disconnect the ignition switch connector.

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

    Resistance:
    Tester connection
    		Condition
    		Specified resistance
    2 - 4
    		Ignition switch OFF
    		10 kΩ or higher
    2 - 4
    		Ignition switch ON
    		Below 1 Ω



NG
REPLACE IGNITION SWITCH
OK


8.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068613E02

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1I-4 - Body ground
    		Always
    		10 to 14 V



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK


9.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068613E02

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1I-9 - Body ground
    		Ignition switch OFF → ON
    		Below 1 V → 10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


10.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND)

  1. Disconnect the 1F connector from the instrument panel junction block assembly.



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


    E068612E04

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    1F-10 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY