DTC C1251/51 Open in Pump Motor Circuit - mineznaem.ru

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–55DTC C1251/51 Open in Pump Motor CircuitDESCRIPTIONDTC No. DTC Detecting Condition Trouble AreaC1251/51Motor terminal circuit is open / short during initial checkimmediately after the motor relay turns off (pump motordoes not rotate).• ABS pump motor• Brake actuator assemblyWIRING DIAGRAMBrake Actuator AssemblySkid Control ECUALT ABS No. 21 2 12 31+BMMotor RelayFL MAIN1GND132GND2BatteryPump MotorINSPECTION PROCEDUREC132774E01BC1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS MOTOR RELAY)(a)(b)(c)Connect the intelligent tester to the DLC3.Turn the ignition switch to the ON position.Select the ACTIVE TEST mode on the intelligent tester.

BC–56BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM(d)Check the operation sound of the ABS pump motorwhen operating it with the intelligent tester.ABS MOT RELAYItem Vehicle Condition / Test Details Diagnostic NoteTurns ABS motor relay ON / OFFOperation sound of motor can beheardOK:The operation sound of the ABS motor should beheard.NGGo to step 2OKREPLACE BRAKE ACTUATOR ASSEMBLY2 INSPECT SKID CONTROL ECU (GND TERMINAL)Skid Control ECU (harness side connector)(a)(b)Disconnect the skid control ECU connector.Measure the resistance according to the value(s) in thetable below.Standard resistanceTester ConnectionSpecified ConditionS1-32 (GND2) - Body ground Below 1 ΩGND2S1F049362E64NGREPAIR OR REPLACE HARNESS ORCONNECTOR (GND CIRCUIT)OKBC3 RECONFIRM DTCYES(a)(b)(c)NOClear the DTCs (See page BC-13).Drive the vehicle at a speed of 4 mph (6 km/h) or more.Are the same DTCs recorded? (See page BC-13)HINT:The skid control ECU inspects the motor relay circuitwhen the stop light switch is turned off and the vehicle isrunning at a speed of 4 mph (6 km/h) or more.ENDREPLACE BRAKE ACTUATOR ASSEMBLY