SERVICE PROCEDURE
17503
May, 2017
SUBJECT:

SAFETY RECALL
HEATER BOOSTER PUMP HARNESS on certain CE
school bus models built 11 May 2015 thru 20
March 2017 with feature codes 48PNW (Plastic
Booster Pump), 49WXD (17k Webasto Heater), and
49MTB (Webasto Smart Temp Timer, Right of
Driver).

DEFECT DESCRIPTION
The circuit that provides electrical power to the heater booster pump may have
been terminated in an unfused cavity of the power distribution center, resulting in
no circuit protection. Certain types of electrical component failures within the
unfused circuit may cause a vehicle fire, resulting in property damage or
personal injury.

MODELS INVOLVED
This safety recall involves certain CE school bus models built 11 May 2015
through 20 March 2017 with feature codes 48PNW (Plastic Booster Pump),
49WXD (17k Webasto Heater), and 49MTB (Webasto Smart Temp Timer, Right
of Driver).

ELIGIBILITY
This procedure applies ONLY to vehicles marked in the International® Service
Portal℠ with Safety Recall 17503. Also complete any other open campaigns
listed on the Service Portal at this time.

PARTS INFORMATION
Part Number
3573312C1
Obtain Locally

Part Description
Terminal, Cable 280 Series Female
Heat Shrink

Quantity
1
As Required

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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SERVICE PROCEDURE
WARNING! To prevent property damage, personal injury, and / or death,
park vehicle on hard flat surface, turn the engine off, set the parking brake
and install wheel chocks to prevent the vehicle from moving in either
direction.
WARNING! To prevent personal injury and / or death, always wear safe eye
protection when performing vehicle maintenance.
WARNING! To prevent personal injury and / or death, allow engine / vehicle
components to cool before servicing.
WARNING! To prevent property damage, personal injury, and / or death,
keep flames or sparks away from vehicle and do not smoke while servicing
the vehicle’s batteries. Batteries expel explosive gases.
WARNING! To prevent property damage, personal injury, and / or death,
remove the ground cable from the negative terminal of the battery box
before disconnecting any electrical components. Always connect the
ground cable last.

1. Park vehicle on flat surface.
2. Shift transmission to Park or Neutral and set parking brake.
3. Turn vehicle ignition to Key OFF position.
4. Install wheel chocks.
5. Unlatch and open battery compartment.
6. Disconnect ground cable from negative terminal of main vehicle battery.
7. Open Electrical Access Panel located on the vehicle’s exterior, below
driver-side window.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 1. Body Fuse / Circuit Breaker Panel
1. Block 10303
2. 15A fuse / circuit breaker F29

8. Locate block 10303 (Figure 1, Item 1) and remove 15A fuse / circuit
breaker F29 (Figure 1, Item 2).

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 2. Body Fuse / Circuit Breaker Panel, with 15A Fuse Removed
1. Block 10303
2. Terminal lock
3. Cavity F2

4.

9. Verify Cavity F2 (Figure 2, Item 3) is unpopulated.
10. Document locations of remaining fuses and circuit breakers in block
10303 (Figure 2, Item 1). Remove remaining block 10303 fuses and
circuit breakers.
11. Disengage and remove terminal lock (Figure 2, Item 2) from block 10303
(Figure 2, Item 1).
NOTE: It will not be possible to fully rotate the electrical panel.
12. Remove electrical panel and rotate to view rear side.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 3. Body Fuse / Circuit Breaker Panel (Back)
1. Green wire D-74

13. Cut GREEN wire labeled D-74 (Figure 3, Item 1) close to terminal
UX74.
14. Position heat shrink tubing over wire end that is still connected to fuse
block and shrink tubing.
15. Terminate GREEN wire D-74 with 280 Series Female Cable Terminal.
16. Rotate panel to view front.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 4. Body Fuse / Circuit Breaker Panel, with Block 10303 Empty
1. Block 10303
2. Cavity F2

17. Insert newly terminated wire into Cavity F2 (Figure 4, Item 2) in block
10303 (Figure 4, Item 1).
18. Install electrical panel, install terminal lock, and install all fuses and
circuit breakers in correct locations.
19. Reconnect vehicle ground to main battery and close battery box
compartment.
20. Unlatch and open hood.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Figure 5. Engine Compartment
1. Booster pump harness

21. If the booster pump harness (Figure 5, Item 1) was previously
disconnected, connect booster pump harness.
22. Turn vehicle ignition to Key ON position.
23. Activate timer to start Heater Booster Pump and Webasto heater.
NOTE: If the Booster Pump requires replacement, the parts and labor must
be filed on a separate claim section.
24. Using an ammeter, measure the booster pump amperage draw.
a. If measurement is 4.8 Amps with engine off and 5.5 Amps with
engine running, pump is operating to spec. Proceed to Step 25.
b. If measurement exceeds 6 Amps, there is something wrong with
the pump motor. Replace Booster Pump.
25. Deactivate timer for Heater Booster Pump and Webasto heater.
VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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26. Turn vehicle ignition to Key OFF position.
27. Close and latch hood.
28. Remove wheel chocks.

END OF SERVICE PROCEDURE

LABOR INFORMATION
Operation Number
A40-17503-1

Description
Relocate Booster Pump Circuit

Time
0.4 hr

CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected in accordance with this
campaign must be marked with a CTS-1075
Campaign Identification Label.
Complete the label and attach on a clean surface
next to the vehicle identification number (VIN) plate.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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ADMINISTRATIVE / DEALER RESPONSIBILITIES
WARRANTY CLAIMS
Warranty claim expense is to be charged to Warranty. Claims are to be
submitted in the normal manner, making reference to Safety Recall 17503.
Section 7 of the Warranty Policy and Procedures Manual contains further
information related to the submission and processing of AFC / Recall claims.
As with all claim submissions, items acquired locally must be submitted in the
“Other Charges” tab. The cost of any bulk items (such as a bag of cable tie
straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the
cost of the individual pieces / amount used during each repair.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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UNITED STATES AND POSSESSIONS
The National Traffic and Motor Vehicle Safety Act, as amended, provides that
each vehicle that is subject to a vehicle recall campaign must be adequately
repaired within a reasonable time after the owner has tendered it for repair. A
failure to adequately repair within 60 days after a tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not
adequately repaired within 60 days, the owner may be entitled to replacement
with an identical or reasonable equivalent vehicle at no charge, or to a refund of
the purchase price less a reasonable allowance for depreciation.
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
CANADA
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
EXPORT
Export Distributors should proceed immediately to make necessary correction to
units in inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your distributor location.
Export Distributors are to submit warranty claims in the usual manner making
reference to this recall number.
Export Distributors are expected to provide full cooperation and follow-up with
respect to this important subject matter. If you have any questions or need
further assistance, please contact the Regional Service Manager at your regional
office.

NAVISTAR, INC.

VEHICLE RECALL 17503
© 2017 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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