2 Ats 07
2 Ats 07
2 Ats 07
PUBLICATION: 7SE63
The Aftertreatment System Technician's Guide has been revised.
MANUAL REFERENCE
Section Change
A section on Mechanical Troubleshooting was added with tables about Parked
6.1, Mechanical Troubleshooting
Regeneration requirements and symptoms.
The directions in step 1.b of the troubleshooting procedure were changed for SPN
9.1, SPN 3242/FMI 2
3242/FMI 2.
The directions in step 2 of the troubleshooting procedure were changed for SPN
10.6, SPN 3246/FMI 14
3246/FMI 14.
The directions in steps 3 and 4 of the troubleshooting procedure were changed for
17.2, SPN3209/FMI 3
SPN 3609/FMI 3.
The directions in steps 3 and 4 of the troubleshooting procedure were changed for
18.2, SPN 3610/FMI 3
SPN 3610/FMI 3.
MECHANICAL TROUBLESHOOTING
To perform a parked regeneration, the required conditions listed in Table 2 must be met.
Connect DDDL 7.0 to monitor the inputs.
Symptom Required Conditions
High idle regen initiates via the Intake Throttle Valve not
Listen for the ITV to sweep at key up.
dash switch but aborts. (Test ends functioning properly
after 10-15 minutes of activation Turbo not functioning properly Perform a turbo hysteresis test.
of Intake Throttle on Series 60
and MBE 4000 or Exhaust Flap Low output of Engine Fuel Injector Check for plugged tip. Perform cylinder cut out test.
on MBE-900.) Exhaust Flap not functioning
Check solenoid supply voltage and air pressure.
properly (MBE 900)
Aerated fuel Check fuel for aeration.
Table 3 Mechanical Troubleshooting of High Idle Regen Initiated via the Dash Switch
Listed in Table 4 are the common symptoms and possible causes to guide you through mechanical
troubleshooting if regen is not functioning properly when initiated via DDDL 7.0.
Symptom Possible Causes Suggestions
Manual test fuel pressure. Check for plugged fuel filters
Low supply fuel pressure
or aerated fuel.
Monitor HC Doser Injection Status and doser fuel line
Fuel Injection Valve partially pressure. A high HC Doser Injection Status during regen,
plugged usually greater than 25% and doser fuel line pressure
close to engine fuel pressure indicate plugging.
Intake Manifold Pressure Sensor
Compare reading to BARO (key ON, engine OFF).
inaccurate
DOC Outlet Temperature Sensor Compare temperatures before and after engine startup.
non-responsive No temperature change indicates sensor problem.
High idle regen initiates via Electronic Dosing Valve Monitor fuel line pressure. Pressure should change when
DDDL 7.0 and runs indefinitely. inoperative valve commanded to open (PWM > 0).
(Intake throttle on Series 60 and Monitor fuel compensation pressure. Pressure should
Fuel Cutoff Valve inoperative
MBE 4000 or Exhaust Flap on change when valve commanded to 100%.
MBE-900 closes, and there is no
Monitor temperature rise across DOC during regen. Little
HEST Lamp after 25 minutes.) DOC not active
or no temperature rise indicates DOC not active.
DOC Inlet Temperature Sensor Monitor DOC inlet temperature. No temperature change
non-responsive after engine startup indicates sensor problem.
Intake Throttle Valve not
Listen for the ITV to sweep at key up.
functioning properly
Turbo not functioning properly Perform a turbo hysteresis test.
Low output of Engine Fuel Injector Check for plugged tip. Perform cylinder cut out test.
Exhaust Flap not functioning
Check solenoid supply voltage and air pressure.
properly (MBE 900)
Aerated fuel Check fuel for aeration.
High idle regen initiates via Monitor coolant temperature. Temperature should be
Low coolant temperature
DDDL 7.0 and runs indefinitely. greater than 60°C (140°F).
(Intake Throttle on Series 60 and
Monitor DOC outlet temperature. Temperature should NOT
MBE 4000 or Exhaust Flap on High DOC Outlet temperature
be greater than 100°C (212°F) prior to regen.
MBE-900 does NOT close, and
there is no HEST Lamp after 25 Monitor smoke control status during regen. Smoke control
Engine in smoke control mode
minutes.) status should be 0.
Table 4 Mechanical Troubleshooting of High Idle Regen Initiated via DDDL 7.0
SPN 3242/FMI 2
This diagnostic condition is typically DOC Inlet Temperature Sensor Plausibility Error.
NOTE:
If step 8 fails (No Temperature Rise), replace the DOC. If DOC is replaced, send in a fuel sample.
EXHAUST FUMES
To avoid injury or injury to bystanders from fumes, engine or
vehicle fuel system service operations should be performed
in a well ventilated area.