DD15 Troubleshooting – Section 16 Diagnostic Testing

Section 16
Diagnostic Testing

16.1 Overview

16.2 Draining Fuel System Prior to Repairs

16.3 Fuel System Checks

16.4 External and Internal Low Pressure Fuel Leaks

16.5 Monitoring Low Fuel System Pressure

16.6 High Amplifier/Needle Return Flow (Version 4 Fuel System)

16.7 Diagnosis High Amplifier/Needle Return Flow (Version 5 Fuel System)

16.8 Fuel System Leak Detection and Threshold Resetting

16.9 Rail Pressure Bleed Off

16.10 Pressure Limiting Valve Leakage

16.11 Pumping Element Concerns

16.12 Isc Values

16.13 Fuel Filter Life