LIGHTING SYSTEM Parking Brake Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / Main Body / Data List.

   5. Read the display on the intelligent tester.

      Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Parking Brake SW	Parking brake switch signal/ON or OFF	ON: Parking brake switch on OFF: Parking brake switch off	-

      OK
      Normal conditions listed above are displayed.

   
   

   NG

   INSPECT PARKING BRAKE SWITCH ASSEMBLY Click here

   OK

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

2. INSPECT PARKING BRAKE SWITCH ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Parking Brake Switch Assembly)

      Remove the parking brake switch.

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

      Standard resistance
      Tester connection Condition Specified resistance Switch connector - Switch body OFF (When shaft is pressed) 10 kΩ or higher Switch connector - Switch body ON (When shaft is not pressed) Below 1 Ω

   
   

   NG

   REPLACE PARKING BRAKE SWITCH ASSEMBLY

   OK

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

   
   

   1. Disconnect the 2B instrument panel junction block assembly connector.

   2. Disconnect the E12 parking brake switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E12-1 - 2B-12 Always Below 1 Ω E12-1 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 2B-12 - A-12 (PKB) Always Below 1 Ω 2B-12 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)