C1359

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1315/31: SMC1 Changeover Solenoid Malfunction

DTC C1315/31 - SMC1 Changeover Solenoid Malfunction

DTC C1316/32 - SMC2 Changeover Solenoid Malfunction

DTC C1352/21 - Front Increasing Pressure Solenoid RH Malfunction

DTC C1353/23 - Front Increasing Pressure Solenoid LH Malfunction

DTC C1354/25 - Rear Increasing Pressure Solenoid RH Malfunction

DTC C1355/27 - Rear Increasing Pressure Solenoid LH Malfunction

DTC C1356/22 - Front Decreasing Pressure Solenoid RH Malfunction

DTC C1357/24 - Front Decreasing Pressure Solenoid LH Malfunction

DTC C1358/26 - Rear Decreasing Pressure Solenoid RH Malfunction

DTC C1359/28 - Rear Decreasing Pressure Solenoid LH Malfunction

DESCRIPTION

Each solenoid adjusts pressure which affects each wheel cylinder according to signals from the skid control ECU and controls the vehicle.
The master cut solenoid (SMC1/2) is closed and blocks the master cylinder pressure from the electronically controlled brake system control pressure when the system is normal. The master cut solenoid is open and sends the master cylinder hydraulic pressure to the non-assisted brake wheel cylinders during the fail safe due to a system malfunction.










WIRING DIAGRAM









INSPECTION PROCEDURE
NOTE: When replacing the skid control ECU or brake actuator assembly, perform initialization and calibration of the linear solenoid valve. Initialization

PROCEDURE

1. INSPECT BRAKE ACTUATOR ASSEMBLY
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.





(b) Disconnect the brake actuator connector.
(c) Measure the resistance according to the value(s) in the table below.
HINT: Check the brake actuator assembly when it is cooled down.

Standard resistance:






NG -- REPLACE BRAKE ACTUATOR ASSEMBLY
OK -- Continue to next step.
2. INSPECT SKID CONTROL ECU
(a) Reconnect the brake actuator connector.





(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR)
(a) Turn the power switch off.





(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connectors and the brake actuator connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. RECONFIRM DTC
(a) Reconnect the skid control ECU connectors and the brake actuator connector.
(b) Clear the DTCs.
(c) Turn the power switch on (READY).
(d) Check if the same DTC is recorded.
Result:






B -- REPLACE SKID CONTROL ECU
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)