Inspection Procedure 13: ASC-ECU Power Supply Circuit System: Notes

Fig 1: Solenoid Valve, Motor And ASC-ECU Power Supply Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION:

• When the ASC-ECU power supply voltage becomes 9.7 ± 0.3 V or less, the ABS warning lamp, ASC warning display, and ASC OFF display illuminate, and the ABS, stability control, and TCL controls are prohibited.
• If the battery terminal is not tightened properly, a dump surge may occur and the power supply voltage may become abnormally high for a short time.
• If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to CAN BUS DIAGNOSIS TABLE ).
• Whenever ECU is replaced, ensure that the CAN bus lines are normal.
• When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor (Refer to G AND YAW RATE SENSOR CALIBRATION  , STEERING WHEEL SENSOR CALIBRATION  and BRAKE FLUID PRESSURE SENSOR CALIBRATION  ).