Toyota Avalon Service & Repair Manual: Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following system(s) after the cable is reconnected.

System

See Procedure

Lane Departure Alert System (w/ Steering Control)

Intelligent Clearance Sonar System

Parking Assist Monitor System

Panoramic View Monitor System

Pre-collision System

Lighting System (for HV Model with Cornering Light)

TROUBLESHOOTING PRECAUTIONS

(a) When inspecting the rear brakes, disconnect the connector of the parking brake actuator assembly or disconnect the cable from the negative (-) auxiliary battery terminal.

CAUTION:

  • Do not perform the rear brake inspection while either the parking brake actuator assembly connector or the negative (-) auxiliary battery terminal are connected.
  • The rear disc brake piston could operate, resulting in an accident such as hands being caught.

(b) The electric parking brake may still operate up to 20 seconds after the power switch is turned off. Before disconnecting connectors or fuses, turn the power switch off and wait 20 seconds or more.

(c) If a component has been removed and installed, confirm that the system operates normally by checking for DTCs after installation has been completed.

HANDLING PRECAUTIONS

(a) When tilting the vehicle to perform work after parking the vehicle on a level surface, the braking force may not be sufficient. Make sure to pull the electric parking brake switch (electric parking brake switch assembly) to the lock side 2 times (2 lock operations).

HINT:

  • The electric parking brake system determines the amount of force used to operate the parking brake according to the tilt angle detected by the deceleration sensor (airbag ECU assembly).
  • When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.

(b) The parking brake indicator light blinks (red) when the power switch is turned on (IG) after replacing the parking brake ECU (brake actuator assembly). Operate the electric parking brake switch (electric parking brake switch assembly) to turn off the parking brake indicator light (red).

PRECAUTIONS FOR TOWING VEHICLES

(a) For towing precautions: Click here

PARKING BRAKE FORCED RELEASE METHOD

(a) For the parking brake forced release method: Click here

    Parts Location

    Problem Symptoms Table

    See More:

    Toyota Avalon Service & Repair Manual > Occupant Classification System(for Hv Model): Rear Occupant Classification Sensor LH Collision Detection (B1787)
    DESCRIPTION DTC B1787 is stored when the occupant detection ECU receives a collision detection signal sent by the rear occupant classification sensor LH in the case of an accident. DTC B1787 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident di ...

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