Dtc C1253 Pump Motor Relay

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)

RECONFIRM DTC

CHECK HARNESS AND CONNECTOR (+BM1/+BM2 TERMINAL)

CHECK HARNESS AND CONNECTOR (GND1, GND2 AND GND3 TERMINAL)

RECONFIRM DTC

DTC C1253 Pump Motor Relay


DESCRIPTION

The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU (master cylinder solenoid).

DTC Code
DTC Detection Condition
Trouble Area
C1253
There is a motor system circuit (motor input circuit) malfunction.
  1. ABS1 fuse
  2. Motor relay circuit
  3. Skid control ECU (Master cylinder solenoid)

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1253 Pump Motor Relay


INSPECTION PROCEDURE

NOTICE:
  1. After replacing the master cylinder solenoid, perform zero point calibration (Click here).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Start the engine.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

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

  1. Check the operating sound of the motor individually when operating it with the GTS.

    OK:
    An operating sound of the motor can be heard.


NG
Go to step 3
OK


2.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Depress the brake pedal more than 40 times.

  1. Turn the ignition switch to ON.

  1. Wait until the pump motor stops.

  1. Depress the brake pedal several times until the pump motor turns on. (Procedure A)

  1. Wait until the pump stops. (Procedure B)

  1. Repeat the above steps (procedure A and B) 3 more times.

  1. Check if the same DTC is output (Click here).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output (for LHD)
    		B
    DTC is output (for RHD)
    		C


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)

3.CHECK HARNESS AND CONNECTOR (+BM1/+BM2 TERMINAL)

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (master cylinder solenoid) connectors.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1253 Pump Motor Relay

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A24-2 (+BM1) - Body ground
    		Always
    		11 to 14 V
    A25-2 (+BM2) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Master Cylinder Solenoid])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (GND1, GND2 AND GND3 TERMINAL)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1253 Pump Motor Relay

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (master cylinder solenoid) connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A24-1 (GND1) - Body ground
    		Always
    		Below 1 Ω
    A24-32 (GND2) - Body ground
    		Always
    		Below 1 Ω
    A25-4 (GND3) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Master Cylinder Solenoid])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Depress the brake pedal more than 40 times.

  1. Turn the ignition switch to ON.

  1. Wait until the pump motor stops.

  1. Depress the brake pedal several times until the pump motor turns on. (Procedure A)

  1. Wait until the pump stops. (Procedure B)

  1. Repeat the above steps (procedure A and B) 3 more times.

  1. Check if the same DTC is output (Click here).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output (for LHD)
    		B
    DTC is output (for RHD)
    		C


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)