ABS (Antilock Brake System)

BRAKE CONTROL: ANTI-LOCK BRAKE SYSTEM: C1251/51: Open in Pump Motor Circuit

DTC C1251/51 - Open in Pump Motor Circuit

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST BY TECHSTREAM (ABS MOTOR RELAY)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the Active Test mode on Techstream.
(d) Check the operation sound of the ABS pump motor when operating it with Techstream.

ABS / VSC / TRAC:





OK:
The operation sound of the ABS motor should be heard.
NG -- INSPECT SKID CONTROL ECU (GND TERMINAL)
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY
2. INSPECT SKID CONTROL ECU (GND TERMINAL)





(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTCs (ABS (Antilock Brake System)).
(b) Drive the vehicle at a speed of 4 mph (6 km/h) or more.
(c) Are the same DTCs recorded? (ABS (Antilock Brake System))

HINT: The skid control ECU inspects the motor relay circuit when the stop light switch is turned off and the vehicle is running at a speed of 4 mph (6 km/h) or more.

NO -- END
YES -- REPLACE BRAKE ACTUATOR ASSEMBLY