Dtc C0273/13 Open In Abs Motor Relay Circuit

Brake. Camry. Acv40 Gsv40
Brake Control. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT ABS NO. 1 FUSE

INSPECT VSC NO. 2 RELAY

INSPECT VSC NO. 1 (FAIL SAFE) RELAY

INSPECT ENGINE ROOM RELAY BLOCK (POWER SOURCE TERMINAL)

INSPECT ENGINE ROOM RELAY BLOCK

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ENGINE ROOM RELAY BLOCK)

RECONFIRM DTC

DTC C0273/13 Open in ABS Motor Relay Circuit

DTC C0274/14 Short to B+ in ABS Motor Relay Circuit

DTC C1361/91 Short Circuit in ABS Motor Fail Safe Relay Circuit


DESCRIPTION

If a DTC of the motor line is stored, the VSC NO. 1 (fail safe) relay cuts off the power supply to the VSC NO. 2 relay and performs fail safe.
While any of the ABS, TRC, VSC, or BA is operating, the skid control ECU (housed in the actuator assembly) turns the VSC NO. 2 relay on and activates the pump motor in the brake actuator.
This code may be stored if the motor relay (BM) voltage becomes lower than the DTC detecting condition due to insufficient output from the battery or alternator.

DTC No.
DTC Detection Condition
Trouble Area
C0273/13
When any of the following (1 or 2) is detected:
1. All of the following conditions continue for 0.12 seconds or more.
  1. The IG1 terminal voltage is between 9.5 and 18.5 V.
  2. During initial check and ABS, BA, TRC, or VSC are operating.
  3. Relay contact is open when the relay is ON.
2. All of the following conditions continue for 0.12 seconds.
  1. The IG1 terminal voltage is 9.5 V or less.
  2. Relay contact remains open when the relay is ON.
  1. ABS NO. 1 fuse
  2. VSC NO. 2 relay
  3. VSC NO. 2 relay circuit
  4. Brake actuator assembly
C0274/14
When the motor relay is OFF, the VSC NO. 2 relay remains closed for 4 seconds or more.
  1. ABS NO. 1 fuse
  2. VSC NO. 2 relay
  3. VSC NO. 2 relay circuit
  4. Brake actuator assembly
C1361/91
Immediately after the ignition switch is turned on (IG), the relay contact is closed for 4 seconds or more when the VSC NO. 1 (fail safe) relay is OFF.
  1. ABS NO. 1 fuse
  2. VSC NO. 1 (fail safe) relay
  3. VSC NO. 1 (fail safe) relay circuit
  4. Brake actuator assembly

WIRING DIAGRAM


Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (CAMRY_ACV40 RM000000XHR05BX.html).
1.INSPECT ABS NO. 1 FUSE


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Remove the fusible link from the engine room R/B.



    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Check if the fusible link is melted.

    OK:
    The fusible link is not melted.

  1. Install the fusible link to the engine room R/B with the nut.

Torque:
5.4 N*m{55 kgf*cm, 48 in.*lbf}


NG
REPLACE FUSIBLE LINK (ABS NO. 1 FUSE)
OK


2.INSPECT VSC NO. 2 RELAY


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Remove the VSC NO. 2 relay.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Always
    		10 kΩ or higher
    3 - 5
    		Apply B+ between terminals 1 and 2
    		Below 1 Ω


NG
REPLACE VSC NO. 2 RELAY
OK


3.INSPECT VSC NO. 1 (FAIL SAFE) RELAY


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Remove the VSC NO. 1 (fail safe) relay.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Always
    		10 kΩ or higher
    3 - 5
    		Apply B+ between terminals 1 and 2
    		Below 1 Ω


NG
REPLACE VSC NO. 1 (FAIL SAFE) RELAY
OK


4.INSPECT ENGINE ROOM RELAY BLOCK (POWER SOURCE TERMINAL)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    VSC NO. 1 (fail safe) relay terminal 5 - Body ground
    		Always
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK


5.INSPECT ENGINE ROOM RELAY BLOCK


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    VSC NO. 1 (fail safe) relay terminal 3 - VSC NO. 2 relay terminal 5
    		Always
    		Below 1 Ω
    VSC NO. 1 (fail safe) relay terminal 3 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE ENGINE ROOM RELAY BLOCK
OK


6.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ENGINE ROOM RELAY BLOCK)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Disconnect the skid control ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A26-2 (BM) - VSC NO. 2 relay terminal 3
    		Always
    		Below 1 Ω
    A26-2 (BM) - Body ground
    		Always
    		10 kΩ or higher
    A26-14 (MRF) - VSC NO. 1 (fail safe) relay terminal 2
    		Always
    		Below 1 Ω
    A26-14 (MRF) - Body ground
    		Always
    		10 kΩ or higher
    A26-15 (MR) - VSC NO. 2 relay terminal 2
    		Always
    		Below 1 Ω
    A26-15 (MR) - Body ground
    		Always
    		10 kΩ or higher
    A26-45 (R+) - VSC NO. 1 (fail safe) relay terminal 1
    		Always
    		Below 1 Ω
    A26-45 (R+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.RECONFIRM DTC

  1. Clear the DTC (CAMRY_ACV40 RM000000XHV08UX.html).

  1. Start the engine.

  1. Drive the vehicle at the speed of 4 mph (6 km/h) or more.

  1. Check if the same DTC is recorded (CAMRY_ACV40 RM000000XHV08UX.html).

    HINT:
    Reinstall the relays, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

    Result:

    Condition
    		Proceed to
    DTCs (C0273/13, C0274/14 and/or C1361/91) are not output
    		A
    DTCs (C0273/13, C0274/14 and/or C1361/91) are output
    		B
    HINT:
    1. If a speed signal of 4 mph (6 km/h) or more is input to the skid control ECU, with the ignition switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
    2. If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
    3. If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.


B
REPLACE BRAKE ACTUATOR ASSEMBLY
A

USE SIMULATION METHOD TO CHECK