Inspection Procedure 11: ASC-ECU Power Supply Circuit System: Notes

Fig 1: ASC-ECU Power Supply Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: ASC-ECU Power Supply Circuit Connector Locations

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 light, 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 period of time.
• If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. Refer to EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS .
• Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
• When the hydraulic unit (integrated with ASC-ECU) is replaced, always perform the calibration of steering wheel sensor, G and yaw rate sensor, brake fluid pressure sensor, cut valve, and inlet valve. (Refer to G AND YAW RATE SENSOR CALIBRATION  , STEERING WHEEL SENSOR CALIBRATION  , MASTER CYLINDER BRAKE FLUID PRESSURE SENSOR CALIBRATION  , and CALIBRATION OF CUT VALVE AND INLET VALVE  .)