Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM10000000218QY
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 -           ]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): C123A14; IG1 Circuit Short to Ground or Open; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]

DTC

C123A14

IG1 Circuit Short to Ground or Open

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C123A14

IG1 Circuit Short to Ground or Open
  • Diagnosis Condition:

    Ignition switch ON

  • Malfunction Status:

    When the hybrid vehicle control ECU is communicating via CAN communication, IG power is not input to the No. 2 skid control hybrid vehicle control ECU (brake actuator sub-assembly).

  • Detection Time:

    Approximately 15 seconds
  • Wire harness and connector
  • No. 2 skid control ECU (brake actuator assembly)

DTC stored

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • To ensure that the electric parking brake does not operate, wait for 3 minutes or more with the ignition switch off, the driver door closed, and the brake pedal not depressed, then disconnect each connector, fuse and relay.
  • After replacing the No. 2 skid control ECU (brake actuator assembly), perform "Calibration".

    Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

  • When replacing the No. 2 skid control ECU (brake actuator assembly), operate the electric parking brake switch (integration control and panel assembly) as the parking brake indicator light blinks when the ignition switch is first turned ON.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (IG1 TERMINAL VOLTAGE)

(a) Disconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A105-45 (IG1) - Body ground

Ignition switch ON

11 to 14 V

*a

Front view of wire harness connector

(to No. 2 Skid Control ECU (Brake Actuator Assembly))
OK

REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/o Vacuum Brake Booster): REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/o Vacuum Brake Booster): REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/o Vacuum Brake Booster): REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR