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6/1/22, 1:55 PM
Article
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Electronic Stability Program (ESP), Electronic
Stability Control (ESC): Changes And Removal
Information; Permissible PAR File Changes - US07
And Newer Emissions, Model Year 2008 And
Newer
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Internal Content
I. Information
The Anti-lock Braking System ( ABS ) system can be configured in
several different ways:
• Basic ABS: 4S4M only, no traction control.
• ATC ABS: 4S4M, 6S4M or 6S6M configurations, traction control, with
or without hill start, no stability control.
• ESP ABS: 4S4M, 6S4M or 6S6M configurations, traction control,
with or without hill start, stability control.
Basic ABS and ATC ABS do not normally require programming.
Some programming is completed at the plant for tire size settings, and to
configure and activate the Hill Start function.
ESP ABS is heavily parameterized to define the truck's geometry and
performance, Replacement of the Electronic Control Unit ( ECU ) will
require the ECU to be reprogrammed. There are certain physical
changes to the truck that can be made, but require the actual parameter
file to be revised and thus also reprogramming:
• Wheelbase changes
• Drive axle bogie spread changes
• Installation of pusher or tag axle
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• Axle arrangement changes, i.e. 6x4 converted to 4x2
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Axle arrangement changes, i.e. 6x4 converted to 4x2
Article
• Vehicle type changes, i.e. tractor to truck
Note: Trucks with two driven axles requires 6S6M ABS. Most vehicles
are not 6S6M to start with, changes are likely to be required.
Tractor to truck changes are approved based on the body type to be
installed.
Current approved body types/vocations:
• Auto Hauler (Towing Truck)
• Concrete Mixer (Non-towing)
• Dump Truck (non-towing or Towing)
• Fire Apparatus (non-towing)
• Flat Bed (non-towing)
• Liquid Bulk Tanker (non-Towing)
• 6x4 Motor Home (non-towing or towing)
• 4x2 Motor Home (non-towing)
• Roll-off Dumpster (non-towing)
• West Coast Fuel Hauler (towing Truck)
Any body type not listed above will require approval from (PD). (PD) may
require the vehicle to be tested by Bendix with its new body for final
approval. Alternatively, (ESP) may be removed.
II. ESP removal:
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ESPUImay be required or requested to be removed under certain
conditions
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conditions.
Article
Vehicles required by regulation to have Electronic Stability Control
(ESC):
United States:
Three axle tractors having a steer axle with a Gross Axle Weight Rating
(GAWR) of 14,600 pounds or less and two driven axles with a GAWR of
45,000 pounds or less built after 1 August 2017 are required by Federal
Motor Safety Standard FMVSS 136 to have an electronic stability control
system. ESP may not be removed from these vehicles. At the time of
this article's publication, there is not an equivalent Federal Motor Carrier
Safety Regulation (FMCSR) requiring these vehicles to keep the ESC
system in order to pass a DOT inspection, although the Federal Motor
Carrier Safety Administration (FMCSA) may add one in the
future. Current regulations should be reviewed when changes or
removal are required.
All remaining tractors built after 1 August 2019 will be required to
have ESC.
Canada:
Canada enacted Canadian Motor Vehicle Safety Standard CMVSS 136
some time, following FMVSS 136. Transport Canada kept the same
implementation plan and timing as in FMVSS 136. The US spec and
timing above then also apply to Canada.
ESP removal, details:
The ESP system cannot be electronically turned “off”. Removal requires
removing the ESP ECU and replacing it with an ATC ABS ECU. The yaw
rate sensor, steering angle sensor, trailer modulator valve, and brake
pressure sensors must be electrically disconnected and preferably
removed. There are certain messages broadcast by the ESP ECU that
are “expected” from other vehicle ECUs. These must be reprogrammed
with non-ESP data sets in order to maintain cruise control and/or other
functions.
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Article
The vehicle parameter file needs to be re-written to delete or comment
parameters specific to ESP in order to avoid the risk of ghost fault codes.
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bendix esp
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