3. Refer to the below programming procedure for A26 or Cummins TRP# 12489 and TSB210187 and start the programming procedure on the
vehicle

4, Remove the wire loom from the pigtail end.

5. Loop each wire and apply heat shrink tubing to each end of the wire (Refer to figure #6).

[Figure 6: QLS Pigtail Wire Loop

6. Use a heat gun to apply heat to each piece of heat shrink tubing, ensuring glue is extruded from the end and sealed by pinching the end of each
piece with pliers (Refer to figure #7).

Figure 7: QLS Pigtail Wire Sealing

7. Once all four wires are sealed, reconnect the pigtail to the chassis hamess connector.

8. Secure the harness using a zip tie (Refer to figure #8).

Figure 8: QLS Pigtail Installed

Item 1: Zip tie securing the harness
Item 2: Pigtail connected to chassis connector
Item 3: Harness to QLS left unsealed

9. Complete the vehicle programming as needed, for Cummins powered vehicle create a new post calibration health report prior to disconnecting
the service tool and interface cable.

IMPORTANT:

[A customer letter should be provided to the driver and placed in each vehicle that receives the
software. Ensure that the operator fully understand the impacts and effects of the DEF gauge
prior to releasing the vehicle. Refer to Cummins TRP2489 for the required documentation.

Navistar Programming Procedure

Refer to NED Programming Procedure

Optional Window Cling

In an effort to improve driver awareness Navistar has developed an optional static cling sticker (see figure #9) that can be installed on the
windshield. Each dealer was provided an initial shipment of clings free of charge based on previous parts order volume. It is recommended that
this be placed in a locate that is visible to the driver however does not obstruct their view, see figure #10 for examples.

If additional window clings are desired:

Dealers may order from the print portal:

o US Dealer Print Portal: Navistar Print Portal - Online Store
« Please note: The price is listed as "Subscription", this is just used to provide a zero cost. The purchaser will not be subscribed to

anything
« Shipping will be initially charge, but will be credited back to the dealer at the following month.
e Canadian Dealer Print Portal: nadian Navistar Print Ps | - Onlin

Customers and fleets may order window clings from the Navistar tools catalog
© Tools Catalog: Navistar Service Tools Catalog

Search tip: Using the keyword "QLS Cling" in either the print portal and/or tools catalog will return the different options for this window cling

) QUALITY LEVEL SENSOR (QLS)
Y y Emergency Calibration Release

The Environmental Protection Agency (EPA) and the California Air Resource
Board (CARB) have approved a temporary Emergency Calibration Release for this
vehicle until parts become available.

el ets arcane ca in tt a;
allows it to continue operating without a functioning Dieset_ | tMPORTANT: AE
Exhaust Fluid (DEF) gauge ‘ewe s ©

engine derate due to

+ During operation, the DEF level gauge may be inoperable or | iow DER til DEF tank
splay readings that are incorrect. It may show the DEF tank | Whenever tueting the
is fll when i is nearly empty. vehicle DEF Is required

+ The only way to inspect / check DEF tank level i to add DEF | to operate the vehicle

to the tank. DEF should be added with care to avoid spills

Figure 9: Window Static Cling Sticker (3 inch x 5 inch) |

Part Number Language
4328819R1 English
F4328819R1 French

M4328819R1 Spanish

Place in a location
that is does not
restrict the drivers
Mn

Locations shown
are optional

[Figure 10: Window Cling Installation options
[Place the cling in a location on the window that is visible to the driver but does not obstruct their view.

DEF Cluster Alarm

Depending on the DLB parameter setting the cluster may produce an audible alarm for low DEF level. This should only be checked if there is a
complaint or it is known to have been changed. The default setting is set to "No Alarm’, if the parameter has been changed it will need to be
returned to the original setting of "No Alarm". Refer to the image below.

Feanres Esc

(Create 2 dogrostes sesson of the sgnas assocated mith the selected featres. Make Sesson

Figure 11: DLB Cluster Alarm Parameter Setting

Under the feature 597082 for "DEF Gauge & Warming Indicator"
Ensure parameter |D 2859 for "DEF Level Alrm" is set to "0" or "No Alarm"

FREQUENTLY ASKED QUESTIONS (FAQ):

How do | get a Cummins fleet count?

* Phone: Dial 1-800-Cummins and choose option 1, followed by options 1 and 6
* Email:
© If in the US please use the following email address: [email protected]
© If in Canada please use the following email address: [email protected] (Eastern Canada) & [email protected]
(Western Canada)

How do I perform the software update?
+ Refer to Cummins Insite Support Page.

Who pays for calibration, fleet count and diagnostic time?
+ For Cummins powered vehicles, only if the QLS emergency calibration is installed, it will be filed and paid through the TRP# 12489.

+ For Navistar powered vehicle, only if the QLS emergency calibration is installed, it will be filed and paid through AFC #21901 (Expired
12/31/2022)

Can I replace the QLS after the calibration is installed?

+ No, it will be replaced through a future action, Navistar and Cummins will provide documentation for this action at a later date once the parts
supply has stabilized. Until then the failed QLS should remain in the vehicle

Can the sensor connector be left unplugged?

* No, the sensor connector cannot be left unplugged. Exposure to environmental conditions could induce other failures once the sensor is
replaced at a later date. Please follow the repair procedure to cut and seal the sensor pigtail

Can the calibration be used on faults other than the ones listed in this article?

+ No, the calibration has only been approved for the fault listed in this article. If other faults are determined to be caused by a QLS failure the
sensor will need to be replaced.

What if the QLS is causing a short on the aftertreatment datalink for V-Ref circuits while also setting communication faults?

+ Ifthe QLS is the cause, following the steps outlined under the repair section will remove the QLS electrically from the chassis harness
correcting the short.

Do I need to replace the DEFTHV at the same time as installing the calibration?

+ No, there is no need to flow test or replace the DEFTHV at this time. It will be handled in future actions when the QLS is replaced. If it is
determined the DEFTHV is needed due to a tank not being able to thaw, it will need to be diagnosed and replaced under standard warranty.

How do I handle vehicles where my parts order is cancelled, however the failure does not qualify for the calibration?
+ Place a new critical unit down order (with VIN) for the QLS and reference the old order in the case file.

If | had a QLS on order and already did initial diagnostics prior to the cal becoming available, do | need to do the diagnostics again
before putting the cal in?

+ No, we only need to ensure the circuit diagnostics have been performed prior to installing the calibration. If that has already been performed
there is no need to repeat them.

| have a vehicle that the sensor was pulled out of to repair another vehicle, how do I handle this repair?

+ Areplacement sensor will need to be installed, the vehicle cannot operate without a QLS installed.
Is there a need to seal the wiring to the QLS?

+ No, since the sensor has failed, it will be replaced at a later date. The wiring on the chassis side must be sealed.
Can the heat shrink, and zip tie be filed under the Cummins TRP?

+ Yes, the TRP was udated to include the heat shrink and zip tie needed on 10/21/21
+ Any claims filed prior to this date that the heat shrink and zip tie were used please review with your local DSM.

If the TRP has already been completed prior to the release of the pigtail cutting procedure, should the vehicle be brought back in to
have the harness cut?

+ If the truck has not been released it should have the harness cut. If the truck has been released to service, it should not be taken out of
service without a complaint.

How do i know if a truck already back in service needs the harness cut?

+ Ifthe driver notes the DEF gauge returns to working that is an indication the faults are intermittent, the driver may also notice a cluster tone
every time the gauge drops back out. Or if any other fault codes from SPN 3364, 3031 or 1761 are present the harness should be cut,

Ifa truck returns and requires the harness cut, who pays for the claim?
+ This should be filed under the standard vehicle warranty or consult your local DSM.
Why is there no additional labor provided for the harness cutting procedure?
+ The harness cutting procedure is intended to be performed simultaneously with the programming event resulting in the time overlapping
For the Navistar engine calibrations, can it be programmed through NavKal?
* No, the programming option is only available through NEDs when the fault codes are present
For the Navistar engine calibration, how do i recover a blank ECM after a failure in the programming?

+ First try reconnecting to the vehicle with NEDs, the software should try to restart the calibration process where it left off. If for some reason
this does not work please create a case file with Navistar.

For the Navistar engine calibration, how likely is a programming failure to occur?

+ In testing, the only failures that occurred were intentionally induced for testing. So, we don't expect any failures, however the most likely
cause of a failure are from low battery conditions on the vehicle and/or the laptop.

EXTENDED SERVICE CONTRACTS

In October 2022 Navistar released an extended service contract (ESC) on some vehicles for the DEF tank sensor assembly (QLS) and the DEF
tank heater valve (DEFTHV). Only vehicles that were identified as being built with non covered QLS sensor AND did not have a warranty claim
showing the updated QLS and update DEFTHV installed received this contract.

The ESC is NOT intended to be used to remove the temporary calibration on vehicles that have already received or to cover a vehicle receiving
this calibration. Any vehicle receiving the calibration should be filed under the AFC or TRP listed below. Any vehicle that has already received the
calibration should NOT have the calibration or sensor replaced. Those vehicles will be placed in a voluntary emission recall at a later date and
Navistar will provide additional communication to support this activity once there is adequate inventory levels to support releasing the recall

To assist we have put together an FAQ page HERE

For additional information please refer to the contacts posted on the service portal under the vehicles information page

WARRANTY INFORMATION
Warranty Claim Coding:

Refer to Cummins TRP # 12489 and file the warranty claim with Cummins
Refer to Navistar AFC #21901 and file the warranty claim with Navistar (Expired 12/31/2022)

Notice: Navistar has released an extended service contract on some vehicles for the DEF tank sensor assembly and DEF tank heater valve. If

performing the calibration procedure outlined in this article the claim should be filed through the AFC or TRP, NOT the extended service contract.
Standard Repair Time(s):

Refer to Cummins TRP # 12489 and file the warranty claim with Cummins

Refer to Navistar AFC #21901 and file the warranty claim with Navistar (Expired 12/31/2022)

OTHER RESOURCES

Master Service Information Site

AEC #21901 Quality Level Sensor (QLS) Emergency Calibration Release (Expired 12/31/2022)
Navistar Customer Reference Sheet 4328818R1

G-Letter G-19-100983 QLS Emergency Calibration

Cummins Quick Serve Online

TRP # T2489 ECM Calibration for DEF Header Sensor Failures due to Parts Shortage TRP for Navistar Vehicles
TSB210187 - Fault Codes 3868, 4572 and 4677 Caused by Diesel Exhaust Fluid (DEF) Header Malfunction