LIGHTING SYSTEM > AFS ECU Power Source Circuit

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DESCRIPTION

This circuit detects the state of the ignition switch and send it to the AFS ECU.

WIRING DIAGRAM


B110608E02


INSPECTION PROCEDURE

1.INSPECT FUSE

  1. Inspect the ECU-IG No.2 fuse and AM1 fuse in the instrument panel junction block assembly.

    Resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


2.INSPECT RELAY


    E064835

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

  1. 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 AFS ECU


    E069130E07

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

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    A17-2 (IG) - A17-1 (E1)
    		Ignition switch OFF → ON
    		Below 1 V → 10 to 14 V
    A17-12 (IGS) - A17-1 (E1)
    		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 (AFS ECU - BODY GROUND)


    E069284E02

  1. Disconnect the A17 connector from headlight swivel ECU assembly.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    A17-1 (E1) - Body ground
    		Always
    		Below 1 Ω
    A17-11 (E1S) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT INSTRUMENT PANEL J/B 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 6
OK

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

6.INSPECT INSTRUMENT PANEL J/B 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


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 condition
    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 J/B 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 J/B ASSEMBLY
OK


9.INSPECT INSTRUMENT PANEL J/B 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 J/B ASSEMBLY