1.CHECK INSTALLATION OF VDCCM&H/U. | Is VDCCM&H/U installed properly without being tilted-
Is the bracket deformation-free-
Are the VDCCM&H/U installation bolts installed without missing or getting loose- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM | Repair the defective part. • Install VDCCM&H/U properly. • Replace the bracket if faulty. • Tighten the VDCCM&H/U installation bolt. General Description > COMPONENT Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM |
2.CHECK STEERING WHEEL. 1) Drive the vehicle on a flat road. 2) Park the vehicle straight. 3) Check the steering wheel for deviation from center. | Is the deviation from the center of steering wheel less than 5°- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM | Perform the centering adjustment of steering wheel, and perform the VDC sensor midpoint setting mode. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > ADJUSTMENT Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM |
3.CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR. 1) Adjust steering wheel to the center position. 2) Using the Subaru Select Monitor, select “Data monitor”. Subaru Select Monitor > OPERATION 3) Read the «Steering Angle Sensor» displayed on display. | Is the indicated reading of the steering angle sensor −10° — 10°- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM | Check the installation of the steering wheel and steering angle sensor, and replace the parts unless wrong installations are found. |
4.CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. 1) Drive the vehicle on a flat road. 2) Park the vehicle straight. 3) Using the Subaru Select Monitor, select “Data monitor”. Subaru Select Monitor > OPERATION 4) Read output of sensors displayed on display. | Are the indicated reading of sensor outputs following values-
Lateral G sensor: −2 — 2 m/s2
Longitudinal G sensor: −2 — 2 m/s2
Yaw rate sensor: −4 — 4 deg/s | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM | Recheck from step 1, and if the problem is not solved, go to next. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM |
5.SET 0 POINT SETTING OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. 1) Using the Subaru Select Monitor, select “Work Support”. 2) Perform the VDC sensor midpoint setting mode. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > ADJUSTMENT | Is 0 point setting successful- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM | Recheck from step 1, and when the 0 point setting is not possible, replace the VDCCM&H/U and steering angle sensor. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) Steering Angle Sensor |
6.PERFORM DRIVING TEST. Inspection Mode | Does the ABS warning light or VDC warning light illuminate during driving-
Does ABS or VDC operate abnormally- | Recheck from step 1, and when the warning lights illuminate or improperly operate, replace the VDCCM&H/U. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1811 SYSTEM |
7.CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. 1) Park the vehicle on a level surface. 2) Using the Subaru Select Monitor, select “Data monitor”. Subaru Select Monitor > OPERATION 3) Read output of sensors displayed on display. | Are the indicated reading of sensor outputs following values-
Lateral G sensor: −2 — 2 m/s2
Longitudinal G sensor: −2 — 2 m/s2
Yaw rate sensor: −4 — 4 deg/s | Currently, it is normal. There may have been a poor contact in the harness and connector or a temporarily noise interference. | Replace the VDCCM&H/U. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) |
8.CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. 1) Remove the VDCCM&H/U installation bolt and bracket. 2) Keep VDCCM&H/U in a horizontal position. 3) Using the Subaru Select Monitor, select “Data monitor”. Subaru Select Monitor > OPERATION 4) Read output of sensors displayed on display. | When VDCCM&H/U is in a horizontal position, are the indicated reading of sensor outputs following values-
Lateral G sensor: −1.5 — 1.5 m/s2
Longitudinal G sensor: −1.5 — 1.5 m/s2
Yaw rate sensor: −4 — 4 deg/s | Check the bracket and brake pipe, and install VDCCM&H/U in a horizontal position to the vehicle. | Replace the VDCCM&H/U. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) |
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