NHTSA ID Number: 10130986
Manufacturer Communication Number: IK1900232
TSB/Document Date: 2018-04-02
Summary
Sleeper Fan and Sleeper TEMP Switch Inoperative
IK1900232 Sleeper Fan and Sleeper TEMP Switch Inoperative
Page 1 of 5
Countries:
AUSTRALIA, CANADA, UNITED STATES,
MEXICO, NEW ZEALAND
Document
ID:
IK1900232
Availability:
ISIS, FleetISIS
Revision:
0
Major System:
Current
Language:
Other
Languages:
ACCESSORIES
Created:
Last
Modified:
9/29/2014
Viewed:
96
English
Author:
NONE
10/2/2014
Charlie
Morgan
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Title : Sleeper Fan and Sleeper TEMP Switch Inoperative
Applies To : ProStar and LoneStar
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
10/2/2014 - Initial Article Release
DESCRIPTION
This document is supplemental to IK1900228 and addresses inoperative SLPR-FAN and SLPR-TEMP switches.
SYMPTOM(s)
No cab control of rear A/C
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
DTC/Light
Not Applicable
Description
Possible Causes:
• Failed switch pack
• Failed private 1708 datalink
Customer Observations or Concerns:
• No rear A/C control from cab
• Rear A/C not blowing cold enough
• No air flow through rear vent while driving
SPECIAL TOOL(s) / SOFTWARE
Tool Description
Diamond Logic Builder (DLB)
Tool Number
Comments
Instructions
Tools Resource Center
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IK1900232 Sleeper Fan and Sleeper TEMP Switch Inoperative
Page 2 of 5
SERVICE PARTS INFORMATION
Kit Description
Not Applicable
Part Number
Quantity Required
Notes
DIAGNOSTIC STEP(s)
To prevent property damage, personal injury, and / or death, read all safety instructions in
the “Safety Information” section of the Service Manual or Diagnostic Manual.
To prevent property damage, personal injury, and / or death, park vehicle on a hard, flat
surface, turn engine off, set parking brake, and install wheel chocks to prevent vehicle
from moving in either direction.
To prevent personal injury and /or death, make sure the engine has cooled before
removing components.
The following procedures are ONLY VALID if A/C system is fully charged and A/C system
checks in IK1900228 were performed.
When a failed circuit or component is detected, repair as needed and retest for original
problem.
Step Action
Switch Pack DTCs:
Decision
Yes. Diagnose and repair switch
pack related DTCs.
a. Connect DLB.
b. Turn ignition Key-ON.
c. Check for DTCs related to switch packs.
No. Go to Step 2.
#1
Are there switch pack related DTCs?
Step Action
Dash SLPR-TEMP SLPR-FAN:
#2
Decision
Yes. Go to Step 7.
a. Use DLB to "Watch" following rear HVAC signals:
•
•
•
•
REAR_HVAC_Temp_UP
REAR_HVAC_Temp_DN
REAR_HVAC_Blower_UP
REAR_HVAC_Blower_DN
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IK1900232 Sleeper Fan and Sleeper TEMP Switch Inoperative
Page 3 of 5
b. Activate SLPR-TEMP switch up and down while monitoring DLB signals.
c. Activate SLPR-Blower switch up and down while monitoring DLB signals.
No. DLB shows no switches active, go to
Step 4.
Does DLB show signals check marked when appropriate switch is toggled?
No. DLB shows one or more of switches
active, but not all switches active, go to
Step 3.
Step Action
SLPR-TEMP SLPR-FAN:
Decision
Yes. Replace switch pack.
a. Turn ignition Key-OFF.
b. Remove rocker switch from non-operating switch.
c. Determine if rocker switch operates circuit board mounted micro switch.
No. Replace rocker components
as needed.
#3
Does rocker switch depress micro switch?
Step Action
Switch Pack PWR / GND:
Decision
Yes. Go to Step 5.
a. Turn ignition Key-OFF.
b. Disconnect switch pack connector (1101M).
c. Turn ignition KeyON.
Ground stud located at left side dash mounted dual post ground plate.
#4
No. Step 4.d has correct volatge
and Step 4.e does not, check for
open or high resistance from pin_A
to ground stud.
d. Measure voltage between switch pack connector 1101M pin-B and good ground.
e. Measure voltage between pin-B and pin-A of switch pack connectpr 1101M.
Do Step 4.d and Step 4.e measure 10.5 13.5V?
Step Action
J1708 Data Link:
No. Both Step 4.d and Step 4.e
have low voltage, inspect 10A fuse
F4K (1013). Inspect circuit A12F
for open or short to ground.
Decision
Yes. Go to Step 6.
a. Measure voltage at diagnostic connector (1650) terminal F to good ground.
#5
Is measurement approximately 2.5V?
No. If voltage is 0 volts, check
J1708 circuit for short to ground or
open circuit.
If voltage is greater than 5 volts,
J1708 circuit is shorted to voltage.
Step Action
J1708 Data Link:
#6
Decision
Yes. Replace switch pack.
a. Measure voltage at diagnostic connector (1650) terminal G to good ground.
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IK1900232 Sleeper Fan and Sleeper TEMP Switch Inoperative
Page 4 of 5
No. If voltage is 0 volts, check
J1708 circuit for short to ground or
open.
Is measurement approximately 2.5V?
If voltage is greater than 5 volts,
J1708 circuit is shorted to voltage.
Step
#7
Action
Decision
J1939 Data Link:
Yes. Replace rear HVAC controller.
a. Turn ignition Key-OFF.
b. Disconnect rear HVAC controller harness connector (5210).
c. Verify pin-15 and pin-16 of rear HVAC controller harness connector 5210 are properly
seated and
not misspinned.
d. Verify both pin-15 and pin-16 resistance to ground is greater than 10K ohms.
e. Turn ignition KeyON.
f. Measure voltage at pin-15 (J1939+).
g. Measure voltage at pin-16 (J1939-).
h. Turn ignition KeyOff.
i. Measure resistance from rear HVAC controller harness connector 5210 pin-15 to pin-16.
No. One or both voltages are 0.0V:
check circuit for continuity to body
controller connector (1602) pin-F5 and
pinF6.
No. Voltages are identical: check that
Step 7.f measurement should be approximately 2.3 volts
the two circuits are not shorted to each
Step 7.g measurement should be approximately 2.6 volts
Step 7.f and Step 7.g measurements may vary by several tenths of a volt, higher or lower other.
Step 7.f and 7.g voltages should noe be equal
Resistance from pin-15 to pin-16 should be 60 ohms
No. If Step 7.i resistance is 120 ohms,
check for an open in one of the J1939
Are voltages and resistance readings correct?
circuits or a missing terminating resistor.
•
•
•
•
•
REPAIR STEP(s)
Not Applicable
REMOVAL PROCEDURE:
Not Applicable
INSTALLATION PROCEDURE:
Not Applicable
WARRANTY INFORMATION
Warranty Claim Coding:
Group: 19030 - Auxiliary No-Idle HVAC
Noun: 638 - Electric HVAC Module
Standard Repair Time(s):
Step
Description
Chassis
1
Switch Pack DTCs
ProStar/LoneStar
Dash SLPR-TEMP SLPRFAN
ProStar/LoneStar
2
EngineSRT
Hours
All
T
0.2 hr
Time
All
T
0.1 hr
Time
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IK1900232 Sleeper Fan and Sleeper TEMP Switch Inoperative
3
SLPRTEMP SLPRFAN
ProStar/LoneStar
All
T
0.2 hr
Time
4
Switch Pack PWR / GND
ProStar/LoneStar
All
T
0.1 hr
Time
5
Switch Pack PWR / GND
ProStar/LoneStar
All
T
0.3 hr
Time
6
J1708 Data Link
ProStar/LoneStar
All
T
0.2 hr
Time
7
J1939 Data Link
ProStar/LoneStar
All
T
0.2 hr
Time
Page 5 of 5
OTHER RESOURCES
Master Service Information Site
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Copyright © 2014 Navistar, Inc.
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TSB/Document ID: IK1900232
Replacement Service Bulletin Number:
MFR Communication Date: 2014-10-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
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