Revision To Troubleshooting Information For VDC DTC C0071 (06-47-14)

Publication date: 2014-10-23
Reference number: 06-47-14

REVISION TO TROUBLESHOOTING INFORMATION FOR VDC DTC C0071

TECHNICAL SERVICE BULLETIN

Reference Number(s): 06-47-14, Date of Issue: October 23, 2014

SUBARU:

2005-14MY Legacy and Outback, All Models; 2009-14MY Forester, All Models; 2008-13MY Impreza, All Models; 2004MY and Later WRX and STI, All Models; 2006-2014MY Tribeca

SERVICE INFORMATION

APPLICABILITY: 2005-14MY Legacy and Outback, All Models

2009-14MY Forester, All Models

2008-13MY Impreza, All Models

2004MY and Later WRX and STI, All Models

2006-2014MY Tribeca

INTRODUCTION

This Service Information bulletin announces a revision to the troubleshooting chart used when diagnosing a VDC system, DTC C0071 on any of the models specified above. The resistance value for the steering angle sensor wiring harness has been revised.

SERVICE PROCEDURE/INFORMATION

IMPORTANT NOTES

Always use the applicable Service Manual troubleshooting chart for the vehicle being repaired as the connector and terminal numbers shown in the example will likely differ.
Only the latest model year's edition of the Service Manual for each model listed above will be updated with this information on STIS in the future.
An EXAMPLE of the troubleshooting chart is supplied on page 2. In Step 4 of the example, the previous instruction was to check for 1 MΩ or more (open circuit). The revised test states to check for resistance of 10 Ω or more.

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK POWER SUPPLY FOR STEERING ANGLE SENSOR. Turn the ignition switch to OFF. Disconnect the connector from steering angle sensor. Turn the ignition switch to ON. Measure the voltage between steering angle sensor and chassis ground. Connector & terminal (B231) No. 4 (+) - Chassis ground (-):	Is the voltage 10 - 15 V?	Go to step 2.	Repair the steering angle sensor power supply circuit.
2 CHECK GROUND CIRCUIT OF STEERING ANGLE SENSOR. Measure the resistance between steering angle sensor and chassis ground. Connector & terminal (B231) No. 1 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 3.	Repair ground circuit in the steering angle sensor.
3 CHECK STEERING ANGLE SENSOR HARNESS. Disconnect the connector from the VDCCM&H/U. Measure the resistance between VDCCM&H/U and steering angel sensor. Connector & terminal (B231) No. 2 - (B310) No. 8: (B231) No. 3 - (B310) No. 10:	Is the resistance less than 1 Ω?	Go to step 4.	Repair the harness between the steering angle sensor and VDCCM&H/U.
4 CHECK GROUND SHORT CIRCUIT OF STEERING ANGLE SENSOR HARNESS. Measure the resistance between steering angle sensor and chassis ground. Connector & terminal (B231) No. 2 - Chassis ground: (B231) No. 3 - Chassis ground:	Is the resistance 10 Ω or more?	Go to step 5.	Repair the harness between the steering angle sensor and VDCCM&H/U.
5 CHECK STEERING WHEEL. Drive the vehicle on a flat road. Park the vehicle straight. Check the steering wheel for deviation from center.	Is the deviation from the center of steering wheel less than 5°?	Go to step 6.	Perform the centering adjustment of steering wheel, and perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. < Ref. to VDC-20, SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT, ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >

REMINDER: SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time. Always refer to STIS for the latest service information before performing any repairs.