Toyota Avalon Service & Repair Manual: Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake ECU (brake actuator assembly) to the radio and display receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK BRAKE WARNING LIGHT

(a) 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 ELECTRIC PARKING BRAKE SYSTEM

OK

2.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY) - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the A39 parking brake ECU (brake actuator assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-20 (PKB) - A39-19 (PKB)

Always

Below 1 Ω

G2-20 (PKB) or A39-19 (PKB) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Panel Switches do not Function

    Parts Location

    See More:

    Toyota Avalon Service & Repair Manual > Airbag System(for Gasoline Model): Lost Communication with Front Door Pressure Sensor LH (B167B,B167C)
    DESCRIPTION The side collision sensor LH circuit (bus 1) consists of the airbag ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. The side airbag pressure sensor LH and side No. 2 airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly t ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

    © 2023 Copyright www.tavalon.net
    0.0156