Symptom Troubleshooting Index

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	Check the EPS motor power wires between the EPS control unit and the EPS motor for a short to body ground Repair as needed If the EPS motor power wires are OK, replace the steering gearbox (short in the EPS motor) (see STEERING GEARBOX REMOVAL AND INSTALLATION ) Check the power and body ground connections at the EPS control unit.