Lighting System (For Hatchback) Parking Brake Switch Circuit

Vehicle Exterior. Yaris. Ncp93, 131
Lighting (Ext). Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

INSPECT PARKING BRAKE SWITCH ASSEMBLY

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

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

LIGHTING SYSTEM (for Hatchback) - Parking Brake Switch Circuit


DESCRIPTION

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

WIRING DIAGRAM


Yaris. Ncp93, 131.Lighting (Ext).Lighting System (For Sedan).Lighting System (For Hatchback) Parking Brake Switch Circuit


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 (YARIS_NCP93 RM000002CE208CX.html)

2.INSPECT PARKING BRAKE SWITCH ASSEMBLY

  1. Inspect the parking brake switch assembly (YARIS_NCP93 RM000001C4V01OX.html).



NG
REPLACE PARKING BRAKE SWITCH ASSEMBLY (YARIS_NCP93 RM000001C4X01NX.html)
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.


    Yaris. Ncp93, 131.Lighting (Ext).Lighting System (For Sedan).Lighting System (For Hatchback) Parking Brake Switch Circuit


    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 (YARIS_NCP93 RM000003TOE00CX.html)