NHTSA ID Number: 10130781
Manufacturer Communication Number: IK1900249
TSB/Document Date: 2018-04-02
Summary
CRX50 Refrigerator Diagnostics; only models Equipped with the CRX50 Refrigerator
IK1900249 LT CRX50 Refrigerator Diagnostics
Page 1 of 4
Countries:
CANADA, UNITED STATES Document ID: IK1900249
Availability:
ISIS, IsSIR
Revision:
4
Major System:
ACCESSORIES
Created:
8/2/2017
Current Language: English
Last Modified: 12/5/2017
Other Languages: NONE
Author:
Viewed:
Greg Scheff
377
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Title : LT CRX50 Refrigerator Diagnostics
Applies To : All LT Chassis Equipped with the CRX50 Refrigerator
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
12/05/2017 Revised performance test instructions.
10/25/2017 - Revised door seal inspection guidelines.
08/16/2017 - Updated performance test instructions relating to the freezer door, included refrigerator model affected.
08/03/2017 - Initial Article Release
DESCRIPTION
This document will guide the user through diagnosing refrigerator complaints such as an inoperable refrigerator, under cooling, and
loose door hinges.
The guidelines listed below are for the refrigerator model CRX50 ONLY
CUSTOMER OBSERVATIONS OR CONCERNS:
Some symptoms the customer may experience are a refrigerator that does not come on at all, the refrigerator runs but will not cool
properly, or the door hinges may not stay secure.
SPECIAL TOOL(s) / SOFTWARE
Not Applicable
SERVICE PARTS INFORMATION
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IK1900249 LT CRX50 Refrigerator Diagnostics
Page 2 of 4
Description
Part Number
Quantity
Notes
Refrigerator, Full Assembly
4086649C92
1
Feature Code 08WLA
DIAGNOSTIC STEP(s)
The steps below will focus one at a time on the three driver complaints that may be present.
LOOSE DOOR HINGE OR SEAL:
Step
Action
Decision
DIAGNOSTIC: Open the refrigerator door and verify the condition.
Yes. Proceed to step 2.
Is the door tight on the hinge?
1
No. Attempt to tighten the hinge screw(s).
If the screw(s) will not tighten then replace
the refrigerator.
Step
Action
DIAGNOSTIC: Verify the door seal is secure.
Decision
Yes. If the seal is loose, cut or damaged,
the refrigerator will need to be replaced.
Check for a loose or damaged seal around the refrigerator door.
Is the seal loose or damaged?
NOTE: A cut or damaged seal is NOT a warrantable condition
2
No. End of door / seal inspection.
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IK1900249 LT CRX50 Refrigerator Diagnostics
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REFRIGERATOR OPERATIONAL CHECKS:
Step
Action
Decision
Open the refrigerator door and verify operation.
Is the light in the interior of the fridge illuminated? If it is NOT, first make certain the
temperature dial is on the ON position.
Yes. Proceed to Refrigerator Performance
Test.
Does the light come on with the door open, and the temperature dial in the ON
position?
1
No. Carefully remove the refrigerator
leaving the harness connected, and
proceed to step 2.
Step
Action
Decision
Verify power at the refrigerator supply.
Yes. Make certain the crimp connectors
or spade terminals are not damaged, and
There needs to be a minimum of 12.0 volts to ensure the fridge controller is not in a that they fit tightly at the connection points
low voltage shutoff mode. Check the main 12 ga. red wire for battery power.
and proceed to step 3.
Is a minimum of 12.0 volts present at the main 12 ga. supply wire?
2
No. Check the power supply circuit for the
cause of the low voltage. Make repairs as
needed and retest for proper operation.
Step
3
Action
Decision
Verify the ground at the refrigerator connection.
Yes. Check the ground circuit for
the source of the poor ground. Make
Supply a known good battery negative connection to the fridge. Now, with a known certain the crimp connectors or spade
good power supply over 12.0 volts, and good ground connection recheck for proper terminals are not damaged, and that they
operation.
fit tightly at the connection points. Make
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IK1900249 LT CRX50 Refrigerator Diagnostics
Page 4 of 4
wiring repairs as needed and retest for
proper operation.
Does the light illuminate, and the compressor turn on?
No. Replace the refrigerator.
WARRANTY INFORMATION
Warranty Claim Coding:
Group: 19304 - Merchandising Items
Noun: 067 Refrigerator
Refer to the Warranty Coding Manual for Group and Noun Codes.
OTHER RESOURCES
Master Service Information Site
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Copyright © 2018 Navistar
, Inc.
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TSB/Document ID: IK1900249
Replacement Service Bulletin Number:
MFR Communication Date: 2017-12-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
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