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Symptom Troubleshooting Index

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TROUBLESHOOTING CHART

Symptom Diagnostic procedure
HDS does not communicate with the EPS control unit or the vehicle Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING )
EPS indicator does not come on Symptom Troubleshooting (see SYMPTOM TROUBLESHOOTING )
EPS indicator does not go off, and no DTCs are stored Symptom Troubleshooting (see SYMPTOM TROUBLESHOOTING )
EPS indicator is not on, no DTCs are stored, but there is no power assist or power assist is reduced
  1. Check the EPS motor power wires between the EPS control unit and the EPS motor for a short to body ground Repair as needed
  2. If the EPS motor power wires are OK, replace the steering gearbox (short in the EPS motor) (see STEERING GEARBOX REMOVAL AND INSTALLATION )
  3. Check the power and body ground connections at the EPS control unit.
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