K00491826

Solution K00491826
Friday, July 6, 2018 3:23:50 PM CEST
Mack Models
Mack Model
LR , LEU , MRU , CHU , CXU , GU , TD
Engine family
Engine family
MP7 , MP8 , MP10
Emission Standard
Emission Standard
2018 , OBD2017 , US17 GHG , US16 , US15 , US13 OBD , US14 GHG
** SOLUTION **
Title
Mack Chassis - Diagnostic Trouble Codes ( DTC ) P208E And P103B Logging With
Possible Derate ( SCR Inducement ) - US14+OBD13, US14+OBD15, US14+OBD16
And US17+OBD16 And Newer Emissions, Common Year Models 2015 And Newer
Cause
P208E and or P103B may be generated due to the intermittent, temporary clogging of
the Diesel Exhaust Fluid (DEF) dosing valve, normally at startup.
Solution
- DO NOT RUN A SERVICE REGENERATION OR CRYSTAL SUBLIMATION TO
EXIT INDUCEMENT FOR THESE CODES.
- IF THE CHASSIS CAME IN WITH DERATE WARNINGS ACTIVE, Proceed to
section two Prior To Programming.
I. Software Levels
Verify the chassis emissions level
- Details can be found in the Product Details box on the Product tab in PTT as seen below:
Review the Detailed Status Information for the relevant code on the DTC Readout.
For US14+OBD13, US14+OBD15, and US14+OBD16
Software improvements have been released for all three emissions levels to address this
DTC. Field Service Bulletins with information and instructions have been published for each
emissions level. All of the FSBs can be found under the Service tab in Impact, Function Group
284. The articles can also be searched for by Title. Refer to the chart below for the correct
bulletin information:
Emissions Level
Field Service Bulletin
(Model Year)
US14+OBD13
FSB 284-066 Engine Control Module (ECM) and
(2015)
Aftertreatment Control Module (ACM), Reprogramming
US14+OBD15
FSB 284-064 Engine Control Module (ECM) and
(2016)
Aftertreatment Control Module (ACM), Reprogramming
US14+OBD16
FSB 284-065 Engine Control Module (ECM) and
(2017)
Aftertreatment Control Module (ACM), Reprogramming
If the Bulletin does not appear when searched with either VIN or Chassis
information entered, search by model:
1. Clear any chassis information from the Search box.
2. Select or enter the applicable model.
3. Make sure Title is selected in the Search By field. Enter the correct Bulletin title in the
text entry field.
4. Press the Search button. The operation will appear in the results window.
5. Select the correct vehicle configuration from the list that appears as shown below:
For All US17+OBD16 And Newer
- Verify software levels are current. Update if they are not. Note that per FSB284-067, the
software released for GHG17 vehicles did not address these codes.
- Proceed to Section II.
If software shows to be current, ensure the Confirmed DTC status is True as shown above,
then proceed with diagnostics below.
II. System Tests
Premium Tech Tool (PTT) Operation number 2589-08-03-05 Aftertreatment selective catalytic
reduction (SCR) system, found under Function Group 2 in the Test tab should be utilized to diagnose
the problem and exit inducement in the order listed below:
1. Test A: System Pressure Build Up
- This test confirms that the DEF pump builds pressure as expected (this test can be skipped if
other tests will also be performed).
- IF PRESSURE IS NOT BUILT, DO NOT REPLACE DEF PUMP. Follow the
instructions below:
1. Start the truck and allow it to run for 10 minutes.
2. Shut off the truck.
3. Rerun the test.
2. Test B: Dosing Test
- A graduated cylinder or other appropriate container with measurement accurate within 2
milliliters (cubic centimeters) should be used to measure dosing test results.
1. Sub-Test 2, Small dosing test - 120 seconds at 25% dosing
2. Sub-Test 3, Large dosing test - 120 seconds at 100% dosing
3. Sub-Test 4, Dosing Test, Exit inducement mode - This will clear any inducement
(derate) condition caused by P208E or P103B.
3. Test C: Exit Inducement Mode
- Test B, sub-test 4 mentioned in the previous section runs the diagnostic monitor on the
dosing valve and verifies it is operating correctly. Test C will reset any inducement (derate)
timers present.
- This test should be run as the last step before releasing vehicle back to the customer so that if
the problem is not completely fixed, the driver will still have 4 hours to reach a service
location before the vehicle begins going into severe derate.
Internal comments (BO)
Do not recommend EECU /ACM replacements for this issue.
Recommend GD along with this CBR.
If the truck has been in multiple times for this issue, recommend thorough inspection for
any clog/electrical issues.
NA_Sister solutions
K24483157
Campaign code
FSB284-064, FSB284-065, FSB284-066
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
DEF Dosing , SCR , 1 1 0 EMS , 2 1 0 ACM , Diagnostic tool
Function Group
Function Group
254 catalytic converter; exhaust emission control equipment , 2584 Dosage Valve;
Injector , 284 control system, fuel supply
Customer effect
Main customer effect
regeneration , calibration/programming/pairing/missing operation , diagnostics
/methodology , efficiency/abnormal behavior , fault code/display
Fluid implicated
AdBlue
Fault code(s)
OBD 2013 Diagnostic
Trouble Codes
P103B , P208E
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
when driving , when stationary
random
Administration
Author
RU4469V
Dealer ID
RU4469V
Last modified by
RU4469V
Creation date
20-04-2018 15:04
Date of last update
19-06-2018 19:06
Review date
15-02-2019 00:02
Status
Published