This Troubleshooting Manual describes the structure and the troubleshooting of electronic control fuel injection system (common rail type) in 4HK1 and 6HK1 industrial engines. Use this manual sufficiently to perform service work properly and quickly. APPLICABLE MODELS : New Holland Kobelco E385 (Tier 3) 4HK1-6HK1 Isuzu Diesel Engine TABLE OF CONTENTS : Engine Control (Common rail type) How to use this manual Precautions on Service Work Procedure of trouble diagnosis How to Inspect Injector How to use flash tool How to use breaker box Engine Control System List of function checks List of diagnostic trouble code Special Tool CNH - EST Diagnostic tool File Format : PDF Language : English Total pages : 580+ * This Manual PDF Compatible with All version Windows PC OS, MAC OS and Linux OS. * Compression utility needed to extract it first, if PDF locate in the archive (e.g. 7-zip).