Vehicle Stability Control System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0278/11: Open or Short Circuit in ABS Solenoid Relay Circuit

DTC C0278/11 - Open or Short Circuit in ABS Solenoid Relay Circuit

DTC C0279/12 - Short to B+ in ABS Solenoid Relay Circuit

DESCRIPTION

The ABS solenoid relay is built in the brake actuator assembly. This relay supplies power to each ABS solenoid. If the initial check is OK, after the ignition switch is turned to the ON position, the relay goes on.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT ABS 2 FUSE
(a) Remove the ABS 2 fuse from the FL block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE ABS 2 FUSE
OK -- Continue to next step.
2. INSPECT SKID CONTROL ECU
(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.

NG -- INSPECT SKID CONTROL ECU (GND TERMINAL)
OK -- Continue to next step.
3. RECONFIRM DTC
HINT: This code is detected when a problem is determined in the brake actuator assembly.
The ABS solenoid relay is in the brake actuator assembly.
Therefore, solenoid relay circuit inspection relay unit inspection cannot be performed. Be sure to check if the DTC code is output before replacing the brake actuator assembly.
(a) Clear the DTCs .
(b) Turn the ignition switch to the ON position.
(c) Are the same DTCs recorded?
Result:

NOTE: When replacing brake actuator assembly, perform zero point calibration .

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPLACE BRAKE ACTUATOR ASSEMBLY
4. 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.
5. RECONFIRM DTC
HINT: This code is detected when a problem is determined in the brake actuator assembly.
The ABS solenoid relay is in the brake actuator assembly.
Therefore, solenoid relay circuit inspection relay unit inspection cannot be performed. Be sure to check if the DTC code is output before replacing the brake actuator assembly.
(a) Clear the DTCs .
(b) Turn the ignition switch to the ON position.
(c) Are the same DTCs recorded?
Result:

HINT: It is suspected that the DTCs output was caused by the poor connection of the connector terminal.
NOTE: When replacing brake actuator assembly, perform zero point calibration .

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPLACE BRAKE ACTUATOR ASSEMBLY