Electronic Power Steering System

• Component Location Index
• General Troubleshooting Information
  • EPS Indicator
  • Diagnostic Trouble Code (DTC)
  • Self-diagnosis
  • Restriction on Power Assist Operation
  • Torque Sensor Neutral Position
  • How to Troubleshoot DTCs
  • How to Use the HDS (Honda Diagnostic System)
  • How to Retrieve DTCs
  • How to Clear DTCs
• Memorizing the Torque Sensor Neutral Position
• DTC Troubleshooting Index
• Symptom Troubleshooting Index
• System Description
  • EPS Control Unit Inputs and Outputs for Connector A (2P)
  • EPS Control Unit Inputs and Outputs for Connector B (2P)
  • EPS Control Unit Inputs and Outputs for Connector C (16P)
  • System Outline
    • Notes
    • Steering Gearbox
  • Torque Sensor
  • System Operation
  • EPS motor operation
    • Notes
    • Power relay (built into the EPS control unit)
    • Fail-safe relay (built into the EPS control unit)
    • Electric current detection circuit
• Circuit Diagram
• DTC Troubleshooting
  • DTC 11-01: Low/High IG1-Terminal Voltage; DTC 11-02: Control Unit Power Voltage; DTC 12-01: Motor Power Supply Voltage
  • DTC 21-01: Excessive Change of the Vehicle Speed Signal; DTC 21-02: Comparison Between the Vehicle Speed and the Engine Speed Signal
  • DTC 22-01: Engine Speed Signal
  • DTC 31-01: Torque Sensor Neutral Position Not Written
  • DTC 32-01: EPS Control Unit Internal Circuit (Current Sensor); DTC 32-02: EPS Control Unit Internal Circuit (Current Sensor Offset); DTC 32-03: EPS Control Unit Internal Circuit (Lower Current Sensor Stuck ON); DTC 32-04: EPS Control Unit Internal Circuit (Lower Current Sensor Stuck ON); DTC 32-05: Motor Current; DTC 32-06: EPS Control Unit Internal Circuit (Sub-CPU); DTC 34-01: Power Relay; DTC 35-01: EPS Control Unit Internal Circuit (CPU); DTC 35-02: EPS Control Unit Internal Circuit (EEPROM); DTC 35-03: EPS Control Unit Internal Circuit (CPU Communication); DTC 35-04: EPS Control Unit Internal Circuit (CPU Communication); DTC 36-01: EPS Control Unit Internal Circuit (Direction Distinction); DTC 36-02: EPS Control Unit Internal Circuit (INH Output Circuit); DTC 37-01: EPS Control Unit Internal Circuit (Step-Up Circuit); DTC 37-02: EPS Control Unit Internal Circuit (Step-Up Circuit);
  • DTC 33-01: Lower FET Stuck ON
  • DTC 33-02: Upper FET Stuck ON; DTC 34-02: Fail-Safe Relay
  • DTC 33-03: FET Stuck ON (Overcurrent); DTC 33-04: FET Stuck ON (Failure); DTC 33-05: FET Stuck ON (Overcurrent Addition)
  • DTC 51-01: Torque Sensor (VT1, VT2, Low/High Check); DTC 51-02: Torque Sensor (VT3 Differential-Amplification Function); DTC 51-03: Torque Sensor (VT1, VT2 Rapid change); DTC 51-04: Torque Sensor (Temperature); DTC 51-05: Torque Sensor (Coil)
  • DTC 61-01: EPS Motor Voltage; DTC 61-02: EPS Motor Voltage
  • DTC 61-03: Motor Harness Open
• Symptom Troubleshooting
  • EPS indicator does not come on
  • EPS indicator does not go off, and no DTCs are stored
• EPS Motor Removal and Installation
  • Notes
  • Removal
  • Installation
• Steering Gearbox Removal and Installation
  • Notes
  • Removal
  • Installation
• Rack End Removal and Installation
  • Notes
  • Removal
  • Installation
• Rack Guide Removal/Installation
• EPS Control Unit Removal/Installation