Operational Checks – Start Aftertreatment Diagnostics Here - Navistar MaxxForce DT Diagnostic Manual

DIAGNOSTIC MANUAL
Operational Checks – Start Aftertreatment Diagnostics Here
Step
1 Verify the following engine systems are in satisfactory condition:
• Engine Oil: Park vehicle on level ground and check oil
level.
• Engine Coolant Level: Check coolant level that is
indicated on deaeration tank.
• Intake Air: Inspect air filter gauge, located on air filter
housing or dashboard.
• Electrical System: Inspect batteries and electrical
system (engine and vehicle) for poor or loose connections,
corroded terminals, or broken and damaged wires.
• Exhaust System: Check Aftertreatment and exhaust
system for damage, excessive corrosion, or leaks.
• Fuel level: Check instrument panel fuel gauge, look into
fuel tanks to verify fuel level, and make sure fuel levels are
equal in both tanks.
• Fuel quality Obtain a fuel sample, and check for water,
waxing, icing, sediment, gasoline, Diesel Exhaust Fluid
(DEF), or kerosene.
• Fuel line routing and condition: With engine OFF,
visually inspect the condition and routing of fuel lines.
Are all of the above engine systems operating as designed?
Step
2 Determine if engine or Aftertreatment system warning lamps
are illuminated. Key-On Engine-Off (KOEO), check Instrument
Panel (IP) for the following warning lamps:
• Amber Warning Lamp (AWL)
• Red Stop Lamp (RSL)
• Malfunction Indicator Lamp (MIL)
• Diesel Particulate Filter (DPF) Lamp
Are any of the above warning lamps illuminated?
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Action
Action
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Decision
Yes: Go to step 2
No: Repair appropriate engine
system and then go to step 2.
Decision
Yes: Go to step 4
No: Go to step 3