VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C1721 YAW RATE SENSOR
DTC DETECTING CONDITION:
Defective yaw rate & G sensor
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
• Hill start assist does not operate.
STEP | CHECK | YES | NO |
1.INTERVIEW CUSTOMERS.
Check if the vehicle ran the road with banks or sandy surface (which does not mean a dirt road).
Did the vehicle run the road with banks or sandy surface (which does not mean a dirt road)?
VDCCM&H/U may record DTC when the vehicle ran the road with banks or sandy surface (which does not mean a dirt road).
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1721 YAW RATE SENSOR">Go to Step 2.
2.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 C1721 YAW RATE SENSOR">Go to Step 3.
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 C1721 YAW RATE SENSOR">Go to Step 3.
3.CHECK OUTPUT OF YAW RATE & G SENSOR WITH 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 the «Yaw Rate Sensor» displayed on display.
Is the reading of «Yaw Rate Sensor» −4 deg/s — 4 deg/s?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1721 YAW RATE SENSOR">Go to Step 4.
Replace the VDCCM only. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > REPLACEMENT">
4.CHECK OUTPUT OF STEERING ANGLE SENSOR WITH 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 the «Steering Angle Sensor» displayed on display.
Is the reading of «Steering Angle Sensor» −10° — 10°?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1721 YAW RATE SENSOR">Go to Step 5.
Perform the centering adjustment of steering wheel.
5.CHECK VDCCM&H/U.
1) Turn the ignition switch to OFF.
2) Perform the Clear Memory Mode. Clear Memory Mode">
3) Perform the Inspection Mode. Inspection Mode">
4) Read the DTC. Read Diagnostic Trouble Code (DTC)">
Is the same DTC displayed?
Replace the VDCCM only. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > REPLACEMENT">
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1721 YAW RATE SENSOR">Go to Step 6.
6.CHECK DETECTION OF OTHER DTCS FOR VDC.
Read Diagnostic Trouble Code (DTC)">
Is any other DTC displayed?
Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)">
Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.
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