K58557784

Solution K58557784
Tuesday, March 6, 2018 10:14:58 PM CET
Solution
Title (customer effect)
Fuel Injector Offset Learning Diagnostic Trouble Codes ( DTC ) / Fault Codes Logged
In Engine Control Module ( EMS ); Possible Rough / Uneven Idle - OBD15 Chassis
Cause
OBD15 chassis may set codes for injector offset learning minimum and maximum
values. The codes may be accompanied by rough idle, with no other performance
complaints or symptoms of injector failure.
Solution
Overview
Cylinder balancing is only active at idle speeds, between 500 and 750 RPM. The
balancing monitor does not run outside of this speed range, which means the codes do
not set under high idle or driving conditions. Offset codes generated with no other
injector-related codes and no symptoms aside from a possible rough idle may not
indicate a physical injector problem, and diagnosing the codes will in many cases lead
lead to no fault found. It has been determined that software may contribute to the
problem. Software improvements have been implemented to better control cylinder
balancing logic.
Relevant DTCs
The list of all applicable DTCs for this issue is included in the Fault Codes section below.
Repair
If any of the fault codes in the section below are set on an OBD15 engine:
A. Check the EMS Main Software (MSW) part number.
- If the EMS MSW part number is lower than 23167877.P01:
1. Update the EMS software
2. Reset Cylinder Balance from Premium Tech Tool (PTT) Operation 2387-0803-01 Cylinder Balancing, located in the Test tab.
3. Run a Cylinder Balance test from the same screen following the reset. Start
the test at minimum temperature (140 °F, 60 °C) and monitor balancing until
coolant temperature reaches approximately 177 °F (81 °C). This will allow
observation of performance during multiple engine modes that are entered during
warm-up.
4. If the Cylinder Balance test still shows an issue and/or there are one or more
Learning Offset codes that return following the update, follow Guided
Diagnostics for the applicable code or codes.
- If the EMS MSW is part number 23167877.P01 or newer, proceed with Guided
Diagnostics for the applicable code or codes.
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
injectors , regulation (cruise control/engine speed) , 1 1 0 EMS
Function Group
Function Group
23 fuel system, excluding gas propulsion , 284 control system, fuel supply
Customer effect
Main customer effect
calibration/programming/pairing/missing operation , efficiency/abnormal behavior , faul
t code/display
Fluid implicated
fuel
Fault code(s)
OBD 2013 Diagnostic
P02CC00 , P02CD00 , P02CE00 , P02CF00 , P02D000 , P02D100 , P02D200 , P02
Trouble Codes
D300 , P02D400 , P02D500 , P02D600 , P02D700 , P101200 , P101400 , P102300
, P102500 , P102700 , P102900
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
Engine speed
when stationary
random
500 - 1000 rpm
Administration
Author
UT0455H
Dealer ID
UT0455H
Last modified by
RU4469V
Creation date
29-01-2018 19:01
Date of last update
20-02-2018 21:02
Review date
10-12-2018 00:12
Status
Published
NA_Reviewer
UT0455H
NA_Author_Group
GTT
NA_MACK_Vehicle_Range
NA_MACK_Vehicle_Ran
ge
Cabover , Conventional
NA_VOLVO_Vehicle_Range
NA_VOLVO_Vehicle_Ra
nge
Engine family
Conventional
Engine family
Volvo , Mack
Emission Standard
Emission Standard
US15