EPS (Electrical Power Steering)

• Component Location Index
• General Troubleshooting Information
  • EPS Indicator
  • Diagnostic Trouble Code (DTC)
  • Self-Diagnosis
  • Restriction on Power Assist Operation
  • How to Troubleshoot DTCs
  • How to Use the HDS (Honda Diagnostic System)
  • How to Retrieve DTCs
  • How to Clear DTCs
• DTC Troubleshooting Index
• Symptom Troubleshooting Index
• System Description
  • EPS Control Unit Inputs and Outputs for Connector A (11P)
  • EPS Control Unit Inputs and Outputs For Connector B (16P)
  • System Outline
    • Notes
    • Steering Gearbox
  • 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 11-02: Low/High IG1-Terminal Voltage
  • DTC 12-01: Motor Power Supply Voltage
  • DTC 21-03: CAN Vehicle Speed Stuck ON (Regular Diagnosis)
  • DTC 22-01: Engine Speed Signal
  • DTC 23-01, 32-09, 32-0C, 34-01, 35-01, 35-02, 35-04, 35-05, 35-08, 35-0A, 36-02, 37-01, 38-01: F-CAN Data Stuck ON (Initial Diagnosis/Regular Diagnosis); Motor Current Correlation (Initial Diagnosis); Battery Current Detect Circuit (Initial Diagnosis); Power Relay Stuck ON (Initial Diagnosis); EPS Control Unit Internal Circuit (CPU) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (EEPROM1) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (CPU Communication) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (A/D Conversion) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (EEPROM2) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (CPU Operation Device) (Regular Diagnosis); EPS Control Unit Internal Circuit (INH Output Circuit) (Initial Diagnosis); EPS Control Unit Internal Circuit (Step-up Circuit) (Initial Diagnosis/Regular Diagnosis); EPS Control Unit Internal Circuit (Temperature Sensor) (Initial Diagnosis/Regular Diagnosis)
  • DTC 23-02: F-CAN Vehicle Speed Data
  • DTC 23-03: F-CAN Engine Speed Data
  • DTC 23-04: F-CAN Bus-Off Malfunction
  • DTC 32-0B, 32-0E: Over Current; Over Current Continuation
  • DTC 32-0F, 52-07: Battery Current/Motor Current Correlation; Torque Sensor Amplifier Out of Range
  • DTC 34-02: Fail-Safe Relay
  • DTC 39-01, 39-02: EPS Control Unit Internal Circuit (Precharge Circuit); EPS Control Unit Internal Circuit (Outside WDT)
  • DTC 39-03: EPS Control Unit Internal Circuit (Power Self-holding Circuit)
  • DTC 52-01, 52-03, 52-04, 52-05: Torque Sensor Allowable Tolerance (Initial Diagnosis); Main Torque Sensor; Sub Torque Sensor; Torque Sensor Allowable Tolerance
  • DTC 52-02: Torque Sensor Power Supply (Initial Diagnosis)
  • DTC 52-06: Torque Sensor Offset Out of Range
  • DTC 52-08: Torque Sensor Power Supply
  • DTC 61-04: Motor Harness Malfunction
  • DTC 61-05: Motor Harness Short
  • DTC 61-06: Motor Harness Open
  • DTC 71-01, 71-03: Motor Angle Sensor (SIN/COS Signals); Motor Angle Sensor (SIN/COS Signals)
  • DTC 71-04: Motor Angle Sensor (Check Signals)
• 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
  • Special Tools Required
  • Removal
  • Installation
• Rack End Removal and Installation
  • Exploded view
  • Removal
  • Installation
• Rack Guide Removal/Installation
• EPS Control Unit Removal/Installation