Navistar N9, Diagnostic Manual

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1 DIAGNOSTIC TROUBLESHOOTING PROCEDURES 29
Pump (HPOP) Test (page
2227).
No, FDP out of
specification: Go to
8.1 Low Fuel Delivery
Pressure (page 2273).
No,: EGR out of
specification: Go to
SPN 2791 FMI 7 Fault
Code Diagnostics (page
1095).
Step 6 Engine no start, cold ambient temperature. Decision
Attempt to start engine.
Does engine fail to start, specifically during cold ambient temperatures?
Yes: Go to 2.2 Engine
No Start, Cold Ambient
Temperature (page 53).
No: Go to Step 7.
Step 7 Engine at operating temperature, no re-start. Decision
A. Run engine to operating temperature.
B. Attempt to start engine at operating temperature.
Does engine fail to start, specifically after being run to operating temperature?
Yes: Go to 2.3 Engine at
Operating Temperature,
No Re-Start (page 54).
No: Go to 2.4 Engine
Never Starts (page 57).