[NOx Inlet — — [Nox outlet

= — = = [/) Engine speed

~ Exhaust gas temperatures

1825 1633 1642 165 1658 1667 1675 1683 1602 170

loli l@h a aceite lm en

2,000

4,750

4,500

4,250

4,000

750

*

7.

\@ Inlet NOx Sensor Quality

@ Outlet NOx Sensor Quality

@ Operating temperature reached

* NOx-in and NOx-out levels vs. Engine speed

NOx Inlet

NOx Outlet

1801 rpm Engine speed

@ Exhaust gas temperatures

| aor | Ti Exhaust ten

T2 Exhaust ten

~ Other sensors

In this instance,review earlier sections of the test to ensure that both sensors are responding to

changes in the same manner. Examples of different stages to review are shown below.

COMPARISON SHOULD BE DONE WHEN BOTH NOx SENSORS ARE READING

BELOW 600 PPM.
Product Product History Diagnose

Test Calibrate Prog

NOx Conversion Test

a

NOx-in and NOx-out levels vs. Engine speed
4,000
3,780
3,600
3.260
3.000
2,750
2,500
2,250
2,000
1,750
1,500
1,250
1,000

760

2,000 |)
1,760}
1,500 |)
4,250 4)

4,000 |)

11.33 11420115

|) NOx Inlet

= = =~ [i] Enaine speed

W168 1167 11,76 1183 1192 12.0

[min]

— — [Nox outet

Product Product History Diagnose

Test Calibrate Program Impact

Maidcom

a

NOx Conversion Test

ra

Ppa

VBC Remote
@ inlet Nox Sensor Quality
© outlet nox Sensor Quality

@ Operating temperature reached

* NOx-in and NOx-out levels vs. Engine speed

4,000
3,750
3,600
3,250
3,000
2,750
2,500
2,260
2,000
1,760
1,500
1,260
4,000
750
600
250

9

2,000 ||
1,760
1,500 ||
1,250
1,000 ||
760 ||
500

260 |

——— [| NOx Inlet

= = = = (\¥] Engine speed

13.08 13.17 1325 1333 13.42

Ti

—— — (NOx Outet

V. eService Case

* NOx-in and NOx-out levels vs. Engine speed

NOx Inlet

Exhaust gas temperatures

T1 Exhaust ter

T2 Exhaust ter

If further assistance is required or tests determine a likely SCR failure, an eService case needs to
be opened, the case MUST INCLUDE:

1. The vehicle history as described in Section I.

2. A complete DTC Readout from the time of the vehicle's arrival.

3. Screenshots of:

* SCR Efficiency values as shown in Section III

* The NOx Conversion Test as shown in the picture in Section IV.

NOTE: Refer to CBR Solution K52225504 - Methods For Taking A Screenshot

4. A description of findings for each item checked in Section IV, including numerical values for the
dosing tests ("Good", "Okay", "In spec", etc. are not acceptable values).

5. Once approval has been received refer to CBR solution K05618059 for an up to date P/N list.

Internal comments (BO) For OBD2019 (Truck MY202 ith VIN number endi ith LNxxxxxx or

LMxxxxxx),
a, If customer is waiting for the vehicle let dealership follow normal
r mentioned in this CBR
b. If customer has dropped the vehicle off at dealer in US,please contact

raj Bh: k1 nwar hn Whelan (wk1932, wk1 Ison
Burkholder (wk1934, wk1 for evaluation, Sin many P20EE
a Id like to visit, install data 1 r or get EATS back for ~10-1
total vehicles.

For GHG 2017 and 2018 cases with P20EE (and /or P103C) evaluate following 6 items:

1. SCR efficiency looks bad (all 5 evaluations hovering around or lower than 80%)

2. NOx conversion just before shutdown looks good (Both NOx sensors are within
10% of each other and values between 200-SO00ppm). When in doubt replace
sensor reading higher value (higher by atleast 10%).

. DEF quality inspection is good

. Dosing flow test is good (52-58cc)

. No other relevant fault codes (EGR system, fuel system)

nn bb WwW

. Prior visit got Sulfur regeneration completed and truck is back within 2 weeks

for same issue or Truck has P103C (SCR inducement code).

If all 6 of the above items are OK, we are OK with replacing SCR (2 Box). Only
vehicles having P103C or customers who decides to park the vehicle when MIL is ON
(for P20EE) would be considered as requiring one box replacement for Mack vehicles
(due to parts shortage of one box mack). Please make sure to collect all the data as per
checklist prior to recommending SCR replacement.

Solution visibility Dealer distribution

Function(s)/component(s) affected

Function affected Diagnostic tool, SCR , DEF Dosing

Function Group

Function Group 254 catalytic converter; exhaust emission control equipment , 258 emissions after-
treatment

Customer effect

Main customer effect regeneration , diagnostics/methodology , efficiency/abnormal behavior , fault code
/display

Fluid implicated Diesel Exhaust Fluid (DEF)

Fault Codes And Error Codes

OBDII Diagnostic Trouble
Codes (P, U, B Format)

P0422-00, P103C , P20EE-00 , P225E-00

Conditions

Vehicle operating mode when driving , when stationary
Frequency of occurrence of

problem random
Administration

Author UT0031H

Dealer ID UT0031H

Last modified by RU4469V
Creation date 05-06-2018 17:06
Date of last update 26-07-2019 15:07
Review date 01-10-2018 00:10
Status Published
Average score 3.75

Number of scores 4

NA_Reviewer ut0031h
NA_Author Group GTT