Dtc C0273/13 Open In Abs Motor Relay Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (MOTOR RELAY)

INSPECT SKID CONTROL ECU (BM TERMINAL)

INSPECT SKID CONTROL ECU (GND TERMINAL)

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

The motor relay supplies power to the pump motor. While the ABS is activated, the skid control ECU turns the motor relay on and operates the pump motor.
If the voltage supplied to the motor relay (BM) is below the DTC's detection threshold due to low voltage from the battery or generator, a DTC may be stored.

DTC Code
DTC Detection Condition
Trouble Area
C0273/13
When either condition below is met:
  1. All of the following conditions continue for 0.1 seconds or more.
    1. The IG1 terminal voltage is between 9.5 and 17.2 V.
    2. ABS, BA, TRC or VSC is operating during initial check.
    3. Relay contact is open when the relay is ON.
  2. Both of the following conditions continue for 0.1 seconds.
    1. The IG1 terminal voltage is less than 9.5 V.
    2. Relay contact remains open when the relay is ON.
  1. ABS NO. 1 fuse
  2. Motor relay circuit
  3. Brake actuator assembly (Motor relay)
C0274/14
With the motor relay control signal OFF, the motor relay remains closed for 4 seconds or more.
  1. Motor relay circuit
  2. Brake actuator assembly (Motor relay)
C1361/91
Immediately after the ignition switch is turned to ON, the relay contact is closed for 4 seconds when the motor fail-safe relay is OFF.
  1. ABS NO. 1 fuse
  2. Motor fail-safe relay circuit
  3. Brake actuator assembly (Motor fail-safe relay)

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System. Dtc C0273/13 Open In Abs Motor Relay Circuit


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (Toyota Fortuner RM000000XHR02TX.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
When C1241/41 is output together with C0273/13, C0274/13 and/or C1361/91, inspect and repair the trouble areas indicated by C1241/41 first (Toyota Fortuner RM000000XW603XX.html).
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (MOTOR RELAY)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Select the Active Test mode on the intelligent tester (Toyota Fortuner RM000000XHW03RX.html).

    ABS/VSC/TRC
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Motor Relay
    		Motor relay
    		Relay ON / OFF
    		Operating sound of motor relay can be heard

  1. Check for the operating sound of the motor relay when operating it with the intelligent tester.

    Result
    Result
    		Proceed to
    The operating sound is not heard
    		A
    The operating sound is heard
    		B


B
Go to step 4
A


2.INSPECT SKID CONTROL ECU (BM TERMINAL)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System. Dtc C0273/13 Open In Abs Motor Relay Circuit

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    S25-24 (BM) - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT SKID CONTROL ECU (GND TERMINAL)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control 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
    S25-13 (GND2) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.RECONFIRM DTC
HINT:
These codes are detected when a problem is identified in the brake actuator assembly.
The motor relay is in the brake actuator assembly.
Therefore, motor relay circuit inspection and motor relay unit inspection cannot be performed. Be sure to check if a DTC is output before replacing the brake actuator assembly.

  1. Turn the ignition switch off.

  1. Reconnect the skid control ECU connector.

  1. Clear the DTC(s) (Toyota Fortuner RM000000XHV03YX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for 30 seconds or more.

  1. Check if the same DTC is recorded (Toyota Fortuner RM000000XHV03YX.html).

    Result
    Result
    		Proceed to
    DTC not output
    		A
    DTC output
    		B
    HINT:
    1. If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the ignition switch ON 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 (a trouble code is not output), slightly jiggle the connectors, wire harnesses, 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 skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
    4. The DTCs may be output due to a bad connection at the connector terminal.


B
REPLACE BRAKE ACTUATOR ASSEMBLY
A

USE SIMULATION METHOD TO CHECK