LIGHTING SYSTEM (for Hatchback) > Parking Brake Switch Circuit


DESCRIPTION

The main body ECU detects the condition of the parking brake switch assembly.

WIRING DIAGRAM


E231968E01


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Main Body / Data List.

  1. According to the display on the Techstream, read the Data List.

    Main Body 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Parking Brake SW
    		Parking brake switch signal /
    OFF or ON
    		OFF: Parking brake released
    ON: Parking brake applied
    		-

    OK:
    Normal conditions listed above are displayed.


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

2.INSPECT PARKING BRAKE SWITCH ASSEMBLY

  1. Inspect the parking brake switch assembly (Click here).



NG
REPLACE PARKING BRAKE SWITCH ASSEMBLY (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  1. Disconnect the D116 parking brake switch assembly connector.

  1. Disconnect the 3A instrument panel junction block assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D116-1 - 3A-28
    		Always
    		Below 1 Ω
    D116-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Remove the instrument panel junction block assembly.

  1. Remove the main body ECU from the instrument panel junction block assembly.



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


    E231969E01


    Text in Illustration 
    *a
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)
    		-
    		-

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3A-28 - MB-12 (PKB)
    		Always
    		Below 1 Ω


NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK

REPLACE MAIN BODY ECU (Click here)