Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H415
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): C13A3,C13AB; Open or Short Circuit in Lock Switch Circuit; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

C13A3

Open or Short Circuit in Lock Switch Circuit

DTC

C13AB

Lock Switch Circuit Comparison

DESCRIPTION

When the electric parking brake switch (integration control and panel assembly) is pulled to the lock side, a lock request signal is output to the parking brake ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13A3

Open or Short Circuit in Lock Switch Circuit

All of following conditions are met:

  1. Ignition switch ON or electric parking brake switch (integration control and panel assembly) pulled to lock side with ignition switch off.
  2. Terminal LCK1 voltage is less than 2.3 V or more than 4.35 V; or terminal LCK2 voltage is less than 1.4 V* or more than 9.0 V*.
  3. Problem occurs for approximately 1 second.

HINT:

*: This value is based on the assumption that the BECU terminal voltage is 11 V.

The threshold changes according to the BECU terminal voltage.

For details, refer to "Threshold Changes According to BECU Terminal Voltage".
  • Electric parking brake switch (integration control and panel assembly)
  • Wire harness or connector
  • Parking brake ECU assembly

Yes

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

C13AB

Lock Switch Circuit Comparison

Both of following conditions are met:

  1. Ignition switch ON or electric parking brake switch (integration control and panel assembly) pulled to lock side with ignition switch off.
  2. ON/OFF judgment of lock switch 1 and lock switch 2 does not match for approximately 1 second.
  • Electric parking brake switch (integration control and panel assembly)
  • Wire harness or connector
  • Parking brake ECU assembly

Yes

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

DTC Detection Condition Combination Table: C13A3 (Pattern 1, Pattern 2, Pattern 3, Pattern 4)

 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

Electric parking brake switch (integration control and panel assembly) is operated to lock side with ignition switch off

○

○

-

-

Ignition switch ON

-

-

○

○

Malfunction Status

LCK1 terminal voltage is below 2.3 V

○

-

○

-

LCK1 terminal voltage is 4.35 V or more

-

○

-

○

Detection Time

Approximately 1 second

Approximately 1 second

Approximately 1 second

Approximately 1 second

Trip Count

1 trip

1 trip

1 trip

1 trip

HINT:

If the conditions match either of these patterns, a DTC will be output.

DTC Detection Condition Combination Table: C13A3 (Pattern 5, Pattern 6, Pattern 7, Pattern 8)

 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnosis Condition

Electric parking brake switch (integration control and panel assembly) is operated to lock side with ignition switch off

○

○

-

-

Ignition switch ON

-

-

○

○

Malfunction Status

LCK2 terminal voltage is below 1.4 V (*)

○

-

○

-

LCK2 terminal voltage is above 9.0 V (*)

-

○

-

○

Detection Time

Approximately 1 second

Approximately 1 second

Approximately 1 second

Approximately 1 second

Trip Count

1 trip

1 trip

1 trip

1 trip

HINT:

  • If the conditions match either of these patterns, a DTC will be output.
  • *: This value is based on the assumption that the BECU terminal voltage is 11 V.

    The threshold changes according to the BECU terminal voltage.

    For details, refer to "Threshold Changes According to BECU Terminal Voltage".

Threshold Changes According to BECU Terminal Voltage

*a

BECU Terminal Voltage (V)

*b

LCK2 Terminal Voltage (V)

*c

Normal Range

*d

DTC Detection Range

DTC Detection Condition Combination Table: C13AB

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

Electric parking brake switch (integration control and panel assembly) is operated to lock side with ignition switch off

○

-

Ignition switch ON

-

○

Malfunction Status

Lock 1 switch and lock 2 switch ON/OFF evaluations do not match

○

○

Detection Time

Approximately 1 second

Approximately 1 second

Trip Count

1 trip

1 trip

HINT:

If the conditions match either of these patterns, a DTC will be output.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
  • When the electric parking brake switch (integration control and panel assembly) is pulled and held for 1 second or more without being pulled fully to the lock side, one of the 2 linked contacts may turn on while the other one turns off causing this DTC to be stored (system is not malfunctioning).
  • When replacing the parking brake ECU assembly, operate the electric parking brake switch (integration control and panel assembly) from the lock side to the release side, as the parking brake indicator light blinks when the ignition switch is first turned to ON.

PROCEDURE

1.

INSPECT ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)

(a) Remove the electric parking brake switch (integration control and panel assembly).

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; PARKING BRAKE: ELECTRIC PARKING BRAKE SWITCH: REMOVAL

(b) Inspect the electric parking brake switch (integration control and panel assembly).

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; PARKING BRAKE: ELECTRIC PARKING BRAKE SWITCH: INSPECTION

NG

REPLACE ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)

OK

2.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY))

(a) Disconnect the G32 electric parking brake switch (integration control and panel assembly) connector.

(b) Disconnect the M35 parking brake ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M35-20 (LCK1) - G32-10 (LCK1)

Always

Below 5 Ω

M35-15 (LCK2) - G32-21 (LCK2)

Always

Below 5 Ω

M35-20 (LCK1) or G32-10 (LCK1) - Body ground

Always

10 kΩ or higher

M35-15 (LCK2) or G32-21 (LCK2) - Body ground

Always

10 kΩ or higher

G32-15 (E) - Body ground

Always

Below 5 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK DTC

(a) Clear the DTCs.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > Electric Parking Brake > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Perform a lock operation with the electric parking brake switch (integration control and panel assembly).

HINT:

When the electric parking brake switch (integration control and panel assembly) is pulled and held for 1 second or more without being pulled fully to the lock side, one of the 2 linked contacts may turn on while the other one turns off causing this DTC to be stored (system is not malfunctioning).

(e) Check for DTCs.

Click here 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > Electric Parking Brake > Trouble Codes

DTC is output

REPLACE PARKING BRAKE ECU ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL

DTC is not output

USE SIMULATION METHOD TO CHECK