PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: C13A2; Engine Switch/Power Switch Malfunction; 2018 - 2020 MY Camry HV [07/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM100000001509W
Model Year Start: 2018	Model: Camry HV	Prod Date Range: [07/2017 - 10/2020]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: C13A2; Engine Switch/Power Switch Malfunction; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

DTC

C13A2

Engine Switch/Power Switch Malfunction

DESCRIPTION

When the power switch is turned on (IG), power is supplied to the parking brake ECU (brake actuator assembly). This DTC is stored if IG power source voltage is not supplied to the parking brake ECU (brake actuator assembly) when communication with other ECUs is established.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
C13A2	Engine Switch/Power Switch Malfunction	Both of following conditions are met: Power switch on (IG) When hybrid vehicle control ECU assembly communicates with main body ECU (multiplex network body ECU) via CAN communication, IG power supply voltage is not received for approximately 3 seconds.	Wire harness or connector IG power source circuit Parking brake 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 inspection procedure.
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.
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).

PROCEDURE

1.	READ VALUE USING TECHSTREAM (IG SWITCH)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Electric Parking Brake / Data List.

(f) Read the Data List according to the display on the Techstream.

Chassis > Electric Parking Brake > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

IG Switch

IG power source status

OFF or ON

OFF: IG power source voltage is not input to skid control ECU (brake booster with master cylinder assembly)

ON: IG power source voltage is input to skid control ECU (brake booster with master cylinder assembly)

Chassis > Electric Parking Brake > Data List

Tester Display
IG Switch

GO TO STEP 3

CHECK DTC

(a) Clear the DTCs.

Chassis > Electric Parking Brake > Clear DTCs

(b) Turn the power switch off.

Chassis > Electric Parking Brake > Trouble Codes

Result	Proceed to
DTCs are output	A
DTCs are not output	B

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY) - POWER SOURCE AND BODY GROUND)

(a) Disconnect the A44 parking brake ECU (brake actuator assembly) connectors.

*a	Front view of wire harness connector (to Parking Brake ECU (Brake Actuator Assembly))

(b) Turn the power switch on (IG).

Standard Voltage:

Tester Connection	Condition	Specified Condition
A44-26 (IG) - Body ground	Power switch on (IG)	8 to 16 V

(d) Turn the power switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A44-2 (EGND) - Body ground	Always	Below 1 Ω

REPAIR IG POWER SOURCE CIRCUIT

REPAIR OR REPLACE HARNESS OR CONNECTOR