SRR Solenoid Circuit - Vehicle Stability Control System
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0226/21, C0236/22, C0246/23, C0256/24, C1225/25: SFR Solenoid Circuit
C1225/25 - SM Solenoid Circuit
DESCRIPTION
These solenoids turn on when signals are received from the skid control ECU and they control the pressure acting on the wheel cylinders to control the braking force.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* When replacing the brake actuator assembly, perform zero point calibration Programming and Relearning.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. RECONFIRM DTC
HINT
These codes are detected when a problem is determined in the brake actuator assembly.
The solenoid circuits are in the brake actuator assembly.
Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if any DTC code is output before replacing the brake actuator assembly.
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at the speed of 20 km/h (12 mph) or more.
(d) Check if the same DTC is recorded Reading and Clearing Diagnostic Trouble Codes.
Result:
HINT
* If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU, with the ignition switch ON and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
* If the normal system code is output (the trouble code is not output), jiggle the connectors slightly, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
* If any DTCs are output while jiggling a connector or wire harness from the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.
* The DTCs were possibly output due to a bad connection of the connector terminal.
B -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Check for Intermittent Problems