Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EXJ0
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 02/2019]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): U0073,U0124,U0129,U0293; Control Module Communication Bus OFF; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

DTC

U0073

Control Module Communication Bus OFF

DTC

U0124

Lost Communication With Lateral Acceleration Sensor Module

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U0293

Lost Communication With Hybrid Vehicle Control System

DESCRIPTION

The parking brake ECU assembly communicates with the hybrid vehicle control ECU assembly, skid control ECU (brake booster with master cylinder assembly) and deceleration sensor (airbag ECU assembly) via CAN communication.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

U0073

Control Module Communication Bus OFF

With the power switch on (IG), the bus is off (communication with other ECUs is not possible) for several seconds (varies according to communication timing).

CAN communication system

Yes

An electric parking brake system malfunction is displayed on the multi-information display.

U0124

Lost Communication With Lateral Acceleration Sensor Module

With the power switch on (IG) and the vehicle being driven at 7 km/h (11 mph) or more, the parking brake ECU assembly cannot receive signals from the deceleration sensor (airbag ECU assembly) for approximately 15 seconds.

  • CAN communication system
  • Deceleration sensor (airbag ECU assembly)

Yes

An electric parking brake system malfunction is displayed on the multi-information display.

U0129

Lost Communication with Brake System Control Module

With the power switch on (IG), the parking brake ECU assembly cannot receive signals from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds (malfunction duration differs depending on the signal).

  • CAN communication system
  • Skid control ECU (brake booster with master cylinder assembly)

Yes

An electric parking brake system malfunction is displayed on the multi-information display.

U0293

Lost Communication With Hybrid Vehicle Control System

With the power switch on (IG) and the vehicle being driven at 6 km/h (9 mph) or more, the parking brake ECU assembly cannot receive signals from the hybrid vehicle control ECU assembly for approximately 10 seconds.

  • CAN communication system
  • Hybrid vehicle control ECU assembly

Yes

An electric parking brake system malfunction is displayed on the multi-information display.

PROCEDURE

1.

GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here 2019 MY RAV4 HV [11/2018 - 02/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

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