NAVIGATION SYSTEM (for HDD) > Parking Brake Switch Circuit

for Preparation Click here


DESCRIPTION

This circuit is from the parking brake switch assembly to the navigation computer sub-assembly.

WIRING DIAGRAM


E150784E66


INSPECTION PROCEDURE

1.CHECK BRAKE WARNING LIGHT

  1. Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.

    OK:
    The brake warning light operates as specified above.



NG
Go to step 3
OK


2.CHECK HARNESS AND CONNECTOR

  1. Disconnect the H60 navigation computer sub-assembly connector.

  1. Disconnect the A24 parking brake switch assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H60-17 (PKB) - A24-1
    		Always
    		Below 1 Ω
    H60-17 (PKB) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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

3.INSPECT PARKING BRAKE SWITCH ASSEMBLY


    E176628E01

  1. Disconnect the parking brake switch assembly connector.

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

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

  1. Proceed to the next step based on the inspection result.

    Result:
    Result
    		Proceed to
    OK
    		A
    NG
    (for LHD)
    		B
    NG
    (for RHD)
    		C



B
REPLACE PARKING BRAKE SWITCH ASSEMBLY (Click here)

C
REPLACE PARKING BRAKE SWITCH ASSEMBLY (Click here)
A

REPAIR OR REPLACE HARNESS OR CONNECTOR