Anti-Lock Brake System

BRAKE CONTROL: ANTI-LOCK BRAKE SYSTEM: C0278/11,C0279/12: Open or Short Circuit in ABS Solenoid Relay Circuit
C0279/12 - Short to B+ in ABS Solenoid Relay Circuit

DESCRIPTION

This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the results of initial check are normal, the relay goes on.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. INSPECT SKID CONTROL ECU (+BS TERMINAL)

(a) Turn the ignition switch off.

(b) Disconnect the skid control ECU connector.

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





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (+BM CIRCUIT)
OK -- Continue to next step.

2. INSPECT SKID CONTROL ECU (GND TERMINAL)

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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

3. RECONFIRM DTC

(a) Clear the DTC ABS (Antilock Brake System).

(b) Start the engine.

(c) Drive the vehicle at the speed of 10 km/h (6 mph) or more to activate initial check.

(d) Check if the same DTC is recorded ABS (Antilock Brake System).

Result





B -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

A -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal