E211 MX Auto DPF Warmup

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E211

Section
ECM/PMCI/PCI

Description
MY17 RC7 and MY18 RC2 Provide Automatic DPF Warm-up Functionality

Release Date
6/1/2018

Introduction
The April 2018 Powertrain Video Newsletter has a segment about this issue. This issue starts about 1/3 of
the way through the video.

MX Behavior during Extended Idling
Before MY17 RC7 & MY18 RC2 MX Automatic DPF Warm-up Functionality
Manual parked regeneration is requested after a certain amount of idle time (6-18 hours)
Manual parked regeneration needs to be initiated by driver using the regen switch

After MY17 RC7 & MY 18 RC2 MX Automatic DPF Warm-up Functionality
The following characteristics are standard for MY2018 chassis and optional for MY2017 chassis.
As a convenience, Automatic DPF Warm-up may occur automatically without driver input while the vehicle
is idling. During extended idling, the vehicle will periodically increase engine speed to perform this
function, sometimes without notification to the driver
If used, driver will likely not have to perform a parked regeneration after extended idling.

Automatic DPF Warm-up Information for Drivers
Drivers cannot drive if a Parked Regeneration is requested. “DO NOT DRIVE” displays on the dash. The
vehicle is safe to drive if an Automatic DPF Warm-up is occurring.
–

Automatic DPF Warm-up can be stopped by pressing the brake pedal and then the vehicle can
be driven.

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E211 MX Auto DPF Warmup

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CAUTION
The Vehicle is NOT safe to drive during Parked Regeneration. A “DO NOT DRIVE. Parked Regen Required”
message displays.

A 10-minute restart delay timer begins if Automatic DPF Warm-up is stopped.
–

If Automatic DPF Warm-up is stopped by the driver, the function will be attempted every 10
minutes until it can be completed.

DPF Warm-up functionality can be disabled via SPP or temporarily disabled using the regen inhibit switch.
–
–

If DPF Warm-up functionality is disabled, a Parked Regeneration may be required after extended
idling.
If drivers use the inhibit switch to disable Automatic DPF Warm-up, drivers will need to remember
to un-inhibit regens before driving

Tailpipe exhaust temperatures will remain below 450F (230C)
The following information is taken from the programming guide:
Activate
Accelerator pedal not pressed
Foot brake not pressed
Clutch pedal not pressed if equipped
Vehicle in neutral
Parking brake set
DPF regen switch is not set to ‘inhibit’
Vehicle speed = 0
No related engine or aftertreatment
faults
Coolant at operating temp
Engine load less than 600 lb-ft*
If PTO active, engine speed greater than
900 RPM**

Deactivate
Accelerator pedal pressed
Foot brake pressed
Clutch pressed if equipped
Vehicle not in neutral
Parking brake not set
DPF regen switch set to ‘inhibit’
Vehicle speed > 0
Related engine or aftertreatment faults, ie:
BPV, VGT, EAS overtemps, pre-DOC temp etc.
Coolant not at operating temp
Engine load greater than 600 lb-ft*
If PTO active, engine speed less than 900
RPM**

* Engine load threshold varies based on engine speed
** Engine speed threshold varies based on ambient conditions

Automatic DPF Warm-up
Automatic DPF Warm-up will occur every 3 – 8 hours during extended idling and take 20 to 60 minutes to
complete.
–
–

Engine speed is elevated while Automatic DPF Warm-up is occurring
If driver notifications are available, a 2-minute countdown timer will alert drivers that an
Automatic DPF Warm-up is about to start

OBD monitors introduced for Auto DPF Warm-up functionality
–

Regeneration related faults indicate an issue with engine temperature control. See Engine
Rapido for details.

Automatic DPF Warm-up will function with PTO or FIC active

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E211 MX Auto DPF Warmup

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Auto DPF Warm-up will NOT change engine speed if PTO is active
PTO Engine Speed needs to be above about 900 rpm for Auto DPF Warm-up to occur with PTO
active

Automatic DPF Warm-up Availability
MY17
Software can be updated to MY17 RC7 to enable Automatic DPF Warm-up Functionality
Functionality will be disabled by default (labels will be included in SPP to allow customers to enable via PVP)

MY18
Software can be updated to MY18 RC2 to enable Automatic DPF Warm-up functionality
MY18 Automatic DPF Warm-up functionality disabled by default on chassis built before 05/01/2018, when
updated to RC2. MY18 Automatic DPF Warm-up functionality enabled by default on trucks built after
05/01/2018.

Updates to driver notifications:
NAMUX 4 (579/567): Never
NAMUX 2/3 (NOT 579/567): Never
VECU: tentative release 6 in early 2019

Resolution
INFORMATIONAL ONLY
1.
2.
3.

Read the introduction information above to learn about new Automatic DPF Warm-up functionality with
MY17 RC7 and MY18 RC2 engine software.
Print the Driver/Operator handout for the Driver/Operator.

If the chassis is a MY17, ask if they would like the Automatic DPF Warm-up function enabled. If
they do, see the procedure below.

Warranty
Information only. This is an option for the customer.

Procedure
Enable Automatic DPF Warm-up for MY17 with RC7 and higher software
Go to bulletin E134 and follow the instructions to make appropriate parameter changes through PVP.
The April 2018 Powertrain Video Newsletter has a segment about this issue. This issue starts about 1/3 of
the way through the video.

Attachments

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E211 MX Auto DPF Warmup

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Driver/Operator handout

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