SCSS Changeover Solenoid Malfunction - Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1319/35: SCSS Changeover Solenoid Malfunction

DTC C1319/35 - SCSS Changeover Solenoid Malfunction

DESCRIPTION

The stroke simulator solenoid (SCSS) generates pedal reactive effort during Electronically Controlled Brake control. If one or more of the front wheels loses brake booster function, the simulator operation is prohibited.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.

PROCEDURE

1. INSPECT BRAKE MASTER STROKE SIMULATOR CYLINDER ASSEMBLY




(a) Disconnect the brake master stroke simulator cylinder connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE BRAKE MASTER STROKE SIMULATOR CYLINDER ASSEMBLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE MASTER STROKE SIMULATOR CYLINDER)




(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
OK -- Continue to next step.
3. INSPECT SKID CONTROL ECU (SOLENOID INPUT)




(a) Reconnect the skid control ECU 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.
4. RECONFIRM DTC
(a) Turn the power switch off.
(b) Reconnect the brake master stroke simulator cylinder connector.
(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(d) Turn the power switch on (READY).
(e) Check if the same DTC is recorded Reading and Clearing Diagnostic Trouble Codes.
Result:






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