Toyota Avalon Service & Repair Manual: Open circuit in Power source circuit (C13A0,C13A5,C13B0)

Toyota Avalon Service & Repair Manual / Brake / Parking Brake / Electric Parking Brake System(for Hv Model) / Open circuit in Power source circuit (C13A0,C13A5,C13B0)

DESCRIPTION

The following DTCs are stored when a malfunction occurs in the parking brake ECU (brake actuator assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13A0

Open circuit in Power source circuit

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off.
  • Parking brake ECU (brake actuator assembly) power source relay circuit is open for approximately 0.5 seconds.

Parking brake ECU (brake actuator assembly)

DTC stored

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

C13A5

Electric Current of Motor

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off.
  • Parking brake ECU (brake actuator assembly) internal current is abnormal for approximately 0.1 to 0.5 seconds (differs according to malfunction).

Parking brake ECU (brake actuator assembly)

DTC stored

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

C13B0

Electric Parking Brake ECU Malfunction

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off.
  • Internal current of Parking brake ECU (brake actuator assembly) or ECU components abnormal for a maximum of 60 seconds (differs according to malfunction).

Parking brake ECU (brake actuator assembly)

DTC stored

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

DTC Detection Conditions: C13A0
 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

Power switch on (IG)

-

Electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off

-

Malfunction Status

Parking brake ECU (brake actuator assembly)'s power source relay is open

Detection Time

Approximately 0.5 seconds

Approximately 0.5 seconds

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C13A5
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

Power switch on (IG)

-

-

Electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off

-

-

Malfunction Status

Parking brake ECU (brake actuator assembly)'s internal current is abnormal (When parking brake is operating)

-

-

Parking brake ECU (brake actuator assembly)'s internal current is abnormal (When parking brake is not operating)

-

-

Detection Time

Approximately 0.3 seconds

Approximately 0.3 seconds

Approximately 0.5 seconds

Approximately 0.5 seconds

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C13B0
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

Power switch on (IG)

-

-

Electric parking brake switch (electric parking brake switch assembly) pulled to lock side with power switch off

-

-

Malfunction Status

Parking brake ECU (brake actuator assembly)'s internal voltage is abnormal

-

-

EEPROM is malfunctioning

-

-

Detection Time

Approximately 0.5 seconds

Approximately 0.5 seconds

Approximately 0.5 seconds

Approximately 0.5 seconds

Number of Trips

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

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.

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)

(a) Replace the parking brake ECU (brake actuator assembly).

Click here

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END

    Electric Parking Brake System(for Hv Model)

    Short circuit in Power source circuit (C13A1)

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