Navistar MaxxForce DT, Руководство по диагностике

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DIAGNOSTIC MANUAL
Table 183 Check Parked Regen Inhibitors
1. Turn ignition switch ON, engine OFF.
2. Using EST with ServiceMaxx™ software, load the Aftertreatment session.
3. Verify all listed Inhibitors are displaying Not Inhibited.
Checks Expected Results Comment
AFT Regen Inhibit status Not Inhibited If inhibited, correct the cause. Check switches and any
DTC that may be causing the Regen inhibit.
Red Stop Alert lamp Off If On, Regen can't be run. Go to appropriate aftertreatment
system diagnostics section in this manual.
Regen inhibit switch Off If On, turn switch Off. If switch does not turn Off, then
diagnose circuit fault.
PTO enable switch Off If On, turn switch Off. If switch does not turn Off, then
diagnose circuit fault.
PTO switch Off If On, turn switch Off. If switch does not turn Off, then
diagnose circuit fault.
Parking brake switch On If Off, set parking brake, if switch does not turn On, then
diagnose circuit fault.
Brake Pedal switch Off If On and foot is off pedal, then diagnose circuit fault.
Accelerator Pedal
Position 0% If above 0%, and foot is off pedal, then diagnose circuit
fault.
Clutch Pedal Switch Off If On and foot is off pedal, then diagnose circuit fault.
Transmission Position Park or Neutral
If engaged, disengage, or diagnose circuit fault.
If no inhibitors and a Regen is needed, go to the following Parked Regen Checks.
Parked Regen Checks
During a Parked Regen the engine speed will ramp up to 1200-1800 rpm.
Typical readings:
• ETV: 80% (closed).
• EGR Position: 0% (closed)
• DOCIT: 482 - 572°F (250-300°C)
• DOCOT: 1112 - 1202°F (600–650°C) (after 5-10 minutes)
• DPFOT: 1022 - 1112°F (550–600°C) (after 10-15 minutes)
• DPFDP: Decreasing steadily once DPFIT and DPFOT are steady and above 1022°F (550°C).
Using EST with ServiceMaxx™ software, open the Aftertreatment session. Start a Parked Regen and
monitor signals.
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