21. Disconnect harness (Figure 5, Item 2) and remove the existing PT sensor (Figure 5, Item 1) from the liquid line.

Figure 6: AC Compressor Discharge Line - N13
Equipped ProStar 122.
Item 1: Discharge line
Item 2: Kit-supplied cap
Item 3: PT sensor connector

Save P-clamps for reuse.
22. MaxxForce 13 / N13 - engine equipped vehicles, remove compressor discharge line and discard.
23. MaxxForce 13 / N13 - engine equipped vehicles, install kit-supplied discharge line (Figure 6, Item 1). Secure using existing Pclamps and new tie­wraps.
24. MaxxForce 13 / N13 - engine equipped vehicles, remove old high pressure A/C switch and install kit-supplied cap (Figure 6, Item
2) into liquid line. Tighten securely.

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Figure 7: A/C Compressor Discharge Line ­ Cummins
Equipped ProStar 122.
Item 1: Discharge line

Save P-clamps for reuse.
25. Cummins - engine equipped vehicles, remove compressor discharge line and discard.
26. Cummins - engine equipped vehicles, install kit-supplied discharge line (Figure 7, Item 1) at compressor.

Figure 8: A/C Compressor Discharge Line ­ Cummins
Equipped ProStar 122.
Item 1: Discharge line

To prevent component / engine damage, never attempt to
pry / bend the A/C discharge line.

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Vehicles built before 14 April 2014 may be equipped with
A/C lines that resemble those shown in Figure 8.

27.Cummins - engine equipped vehicles, ensure the discharge line (Figure 8, Item 1) is installed behind the liquid line:
•
•
•
•

Position the discharge line under the liquid line.
Install fastener at compressor. Ensure there are adequate gaps between the liquid and discharge lines.
Once properly aligned, secure using existing P-clamps and new tie-wraps.
Some production build levels may require the installation of the kit-supplied cap into liquid line. Tighten securely.

28. Cummins - engine equipped vehicles, remove old high pressure A/C switch and install kit-supplied cap (Figure 6, Item 2) into liquid
line. Tighten securely.
29. Remove A/C drier. Refer to appropriate engine service manual, service bulletin, or equivalent for detailed instruction.
30. Install kit-supplied A/C drier. Refer to appropriate engine service manual, service bulletin, or equivalent for detailed instruction.
31. Using A/C machine, begin both default vacuum and leak test procedures.
32. Inspect A/C machine to verify no leaks are present. Once complete, ensure there is no pressure in either line.
33. Remove existing PT sensor connector (Figure 6, Item 3) from loom and cut from harness jumper.

Figure 9: Pigtail
Item 1: Red (Kit) to Gray (Factory) Circuit K6DB
Item 2: White (Kit) to White (Factory) BCM Circuit
Item 3: Green (Kit) to Green (Factory) Circuit K77B
Item 4: Black (Kit) to Gray (Factory) Circuit K9AA or
K9AAA
34. Prepare existing PT jumper harness by trimming wire lengths to properly align to new PT sensor connector pigtails (Figure 9, Items 14).

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Figure 10: Pigtail Splice.
Item 1: Splice

35. Using Navistar approved Proper Procedure for Wire Repair / Splice Operation (SFN­0639), splice and solder (Figure 10, Item 1) the
kit-supplied connector pigtails to the factory PT sensor harness.
36. Insert soldered wires carefully into split loom and secure with tape.

Figure 11: Kit-Supplied PT Sensor - N13 Equipped ProStar 122.
Item 1: Kit-supplied harness / loom
Item 2: Tie-wrap (as needed)
Item 3: Kit-supplied PT sensor connector

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Figure 12: Kit-Supplied PT Sensor - Cummins
Equipped ProStar 122.
Item 1: Kit-supplied PT sensor connector
Item 2: Tie-wrap (as needed)
Item 3: Kit-supplied harness / loom

New PT sensor is pre-installed in discharge line.
37. Connect kit­supplied sensor connector (Figure 11, Item 3, or, Figure 12, Item 1 [Dependent On Engine Equipped]) to new PT sensor,
pre-installed on new discharge line.
38. Secure sensor connector (Figure 11, Item 3, or, Figure 12, Item 1 [Dependent On Engine Equipped]) and harness / loom (Figure 11,
Item 1, or, Figure 12, Item 3 [Dependent On Engine Equipped]) with tie-wraps (Figure 11, Item 2, or, Figure 12, Item 2 [Dependent On
Engine Equipped]).
39. Inspect A/C machine to verify no leaks are present. Once complete, ensure there is no pressure in either line.

Figure 13: Kit-Supplied PT Sensor - N13 Equipped ProStar 122.
Item 1: Tie­wrap
Item 2: Kit-supplied harness / loom

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Figure 14: Kit-Supplied PT Sensor ­ Cummins
Equipped ProStar 122.
Item 1: Kit-supplied harness / loom
Item 2: Tie­wrap
40. Continue securing harness (Figure 13, Item 2, or, Figure 14, Item 1 [Dependent On Engine Equipped]) towards cowl using tie-wraps
(Figure 13, Item 1, or, Figure 14, Item 2 [Dependent On Engine Equipped]).
41. Install air cleaner assembly.
42. Add the volume of oil recovered and recharge system to specified fill capacity. If necessary, refer to IK1900022 A/C Refrigerant and
Oil Capacities.
43. Disconnect A/C machine.

To prevent component damage, do not secure wiring / harness
near any moving parts.

Following the securing of the kit-supplied wiring harness in the
vehicle interior, it is considered a best practice to seal the hole
punctured in the interior accessory grommet (Figure 2, Item 1)
just forward of the operator pedals.
44. From the vehicle interior, secure kit-supplied wiring / harness.
45. Install driver­side interior kick panels.
46. Connect negative battery cable / terminal.

HVAC FEATURE CODES
New Feature Code

Old Feature Code (Being
Replaced)

E-Fix

0595BWY

0595BHK

1068

0595BWZ

0595BJN

1069

Description

BC PROG, HVAC in Cab With Switch
Controls (Bergstrom); High Side
Pressure / Temp Transducer

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BC PROG, HVAC 2010 In Sleeper
(Behr) and Cab (Bergstrom); High Side
Pressure / Temp Transducer

0595BXA

0595BMB

1070

BC PROG, HVAC In Sleeper
(Bergstrom) and Cab (Bergstrom); High
Side Pressure / Temp Transducer

Figure 15: Campaign FIX.
Item 1: Campaign fix parameter
47. Using Diamond Logic Builder® (DLB) E-Fix, perform BCM programming steps:
•
•
•
•
•
•
•
•
•
•

Launch DLB, connect to internet and verify latest release is installed.
Connect the vehicle to DLB.
Click on SELECT tab.
Verify VIN selected is correct.
Click on CAMPAIGN tab.
Verify appropriate FIX parameter is shown (Figure 15, Item 1). Refer to the HVAC FEATURE CODES table listed above.
Click on APPLY SELECTED CAMPAIGN button.
Click on FEATURE tab.
Verify correct parameter is selected.
Depending on vehicle configuration (Day Cab, Conventional, No-Idle Sleeper), locate and check the new HVAC feature code. Refer
to the HVAC FEATURE CODES table listed above.
• After checking on new HVAC feature code, click SAVE and PROGRAM VEHICLE.

Figure 16: Incorrect Software Programming.
Item 1: Blank value

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Figure 17: Correct Software Programming.
Item 1: Programmed value
48. Confirm BCM is properly programmed:
• If temperature signal is blank (Figure 16, Item 1), reprogram BCM.
• If temperature signal shows a value (Figure 17, Item 1), BCM programming is successful.
49. Close and latch hood. If necessary, install hood and front bumper.

If any wires are installed incorrectly or the PT connector is
disconnected, the A/C compressor will not engage.
50. Start vehicle, activate A/C system, and verify the following:
• A/C compressor is engaged.
• A/C system is cooling adequately.
• Cycle key OFF and ON and verify A/C compressor is engaged.
51. Remove wheel chocks.

WARRANTY INFORMATION
Warranty Claims with a failure date of 07/16/2016 and later will not be allowed if the
conversion is not performed during a warrantable failure to the refrigerant side of the
A/C system.
Warranty Claim Coding:
Group: 19000 - Truck Air Conditioner
Noun: 909 - A/c high pressure switch
Standard Repair Time(s):
Step

Description

1-50

Chassis

Engine

SRT

Hours

A/C Pressure Transducer (PT) Switch Install ProStar

Cummins ISX

R19-1012S

1-50

A/C Pressure Transducer (PT) Switch Install ProStar 113

MaxxForce 11/13

R19-1012U-20

1-50

A/C Pressure Transducer (PT) Switch Install ProStar 122

MaxxForce 11/13

R19-1012U-21 Link to Hours

1-50

A/C Pressure Transducer (PT) Switch Install ProStar 122

N13

R19-1012US21

1-50

A/C Pressure Transducer (PT) Switch Install LoneStar

Cummins ISX

S19­1012S

OTHER RESOURCES
Master Service Information Site
IK1900156 ­ Pre­2010 A/C HVAC Service Resource Center

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IK1900228 - 2010 and Newer Vehicle Air Conditioning Diagnostics
© 2015 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

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