NHTSA ID Number: 10130328
Manufacturer Communication Number: sb54289
TSB/Document Date: 2018-03-13
Summary
Production of the ICU2M instrumentation control unit has been discontinued. The ICU4M should be installed if the ICU2M needs replacement.
MPH/KPH
A22-59203-101 A06-41592-007
Chrome
KPH/MPH
A22-59203-121 A06-41592-007
Chrome
KPH Only
A22-59203-131 A06-41592-007
Table 4, Speedometer Conversion
ICU2M
ICU2M (812)
22-46508-000
Freightliner
Service Bulletin, May 2016
Tachometer Conversion
ICU4M Conversion
Trim Ring
ICU4M
Jumper
Black
A22-59204-001
A06-41592-007
Page 3
54-289
ICU2M to ICU4M Conversion
Freightliner
Service Bulletin
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
ICU2M
ICU2M (812)
22-46508-010
> Century Class Conventional
> Argosy COE
Cargo
Columbia
122SD and Coronado
Business Class M2
Cascadia
108SD/114SD
Tachometer Conversion
ICU4M Conversion
Trim Ring
ICU4M
Jumper
Chrome
A22-59204-101
A06-41592-007
Table 5, Tachometer Conversion
Voltmeter Conversion
ICU2M
ICU2M (836)
22-46509-000
22-46509-010
ICU4M Conversion
ICU4M
Jumper
A22-59209-001
A06-41592-007
A22-59209-101
A06-41592-007
Trim Ring
Black
Chrome
Table 6, Voltmeter Conversion
NOTE: The Air Pressure Gauges for the ICU2 were mechanical gauges. Refer to the note above
regarding jumper lengths.
ICU2M (838)
22-53813-000
or -100
22-53813-001
or -101
22-53813-010
or -110
22-53813-011
or -111
Air Pressure Gauge Conversion
ICU2M
ICU4M Conversion
Trim Ring
US/Metric
ICU4M
Jumper
Black
PSI
A22-59219-201
A06-41592-007
Black
KPA
A22-59219-221
A06-41592-007
Chrome
PSI
A22-59219-301
A06-41592-007
Chrome
KPA
A22-59219-321
A06-41592-007
Table 7, Air Pressure Gauge Conversion
Air Pressure
ICU2 (840)
22-46511-000
22-46511-001
22-46511-010
22-46511-011
22-46512-000
22-46512-001
22-46512-010
22-46512-011
Primary and Secondary Air Gauges
ICU2M
ICU4M Conversion
Primary/
Air Pressure
Trim Ring
English/Metric
Secondary
ICU4)
Black
PSI
Primary
A22-59217-201
Black
KPA
Primary
A22-59217-221
Chrome
PSI
Primary
A22-59217-301
Chrome
KPA
Primary
A22-59217-321
Black
PSI
Secondary
A22-59218-201
Black
KPA
Secondary
A22-59218-221
Chrome
PSI
Secondary
A22-59218-301
Chrome
KPA
Secondary
A22-59218-321
Table 8, Primary and Secondary Air Gauges
Page 4
Freightliner Service Bulletin, May 2016
54-289
ICU2M to ICU4M Conversion
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
> Century Class Conventional
> Argosy COE
Cargo
Columbia
122SD and Coronado
Business Class M2
Cascadia
108SD/114SD
Freightliner
Service Bulletin
Turbo Boost Gauge Conversion
ICU2M
ICU4M Conversion
Trim Ring
US/Metric
ICU4M
Jumper
Black
PSI
A22-59211-001 A06-41592-007
Black
KPA
A22-59211-021 A06-41592-007
Chrome
PSI
A22-59211-101 A06-41592-007
Chrome
KPA
A22-59211-121 A06-41592-007
ICU2M (842)
22-46513-000
22-46513-001
22-46513-010
22-46513-011
Table 9, Turbo Boost Gauge Conversion
ICU2M
ICU2M (844)
22-46514-000
22-46514-010
Fuel Gauge Conversion
ICU4M Conversion
Trim Ring
ICU4M
Jumper
Black
A22-59207-001
A06-41592-007
Chrome
A22-59207-101
A06-41592-007
Table 10, Fuel Gauge Conversion
ICU2M (854)
22-46516-000
22-46516-001
22-46516-010
22-46516-011
Engine Oil Pressure Gauge
ICU2M
Trim Ring
US/Metric
Black
PSI
Black
KPA
Chrome
PSI
Chrome
KPA
Conversion
ICU4M Conversion
ICU4M (852)
Jumper
A22-59205-001 A06-41592-007
A22-59205-021 A06-41592-007
A22-59205-101 A06-41592-007
A22-59205-121 A06-41592-007
Table 11, Engine Oil Pressure Gauge Conversion
ICU2M (854)
22-46517-000
22-46517-001
22-46517-010
22-46517-011
Engine Oil Temperature Gauge Conversion
ICU2M
ICU4M Conversion
Trim Ring
US/Metric
ICU4M (854)
Jumper
Black
F
A22-59210-001 A06-41592-007
Black
C
A22-59210-021 A06-41592-007
Chrome
F
A22-59210-101 A06-41592-007
Chrome
C
A22-59210-121 A06-41592-007
Table 12, Engine Oil Temperature Gauge Conversion
ICU2M (856)
22-46518-000
22-46518-001
22-46518-010
22-46518-011
Coolant Temperature Gauge
ICU2M
Trim Ring
US/Metric
Black
F
Black
C
Chrome
F
Chrome
C
Conversion
ICU4M Conversion
ICU4M (856)
Jumper
A22-59206-001 A06-41592-007
A22-59206-021 A06-41592-007
A22-59206-101 A06-41592-007
A22-59206-121 A06-41592-007
Table 13, Coolant Temperature Gauge Conversion
Freightliner Service Bulletin, May 2016
Page 5
54-289
ICU2M to ICU4M Conversion
Freightliner
Service Bulletin
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
ICU2M (864)
22-46520-000
22-46520-001
22-46520-010
22-46520-011
> Century Class Conventional
> Argosy COE
Cargo
Columbia
122SD and Coronado
Business Class M2
Cascadia
108SD/114SD
Transmission Oil Temperature Gauge Conversion
ICU2M
ICU4M Conversion
Trim Ring
US/Metric
ICU4M (864)
Jumper
Black
F
A22-59212-001 A06-41592-007
Black
C
A22-59212-021 A06-41592-007
Chrome
F
A22-59212-101 A06-41592-007
Chrome
C
A22-59212-121 A06-41592-007
Table 14, Transmission Oil Temperature Gauge Conversion
ICU2M (866)
22-46521-000
22-46521-001
22-46521-010
22-46521-011
22-46522-000
22-46522-001
22-46521-010
22-46521-011
Axle Oil Temperature Gauge Conversion
ICU2M
Trim Ring
US/Metric
Axle Rear
Black
F
Forward
Black
C
Forward
Chrome
F
Forward
Chrome
C
Forward
Black
F
Rear
Black
C
Rear
Chrome
F
Rear
Chrome
C
Rear
ICU4M Conversion
ICU4M (866)
Jumper
A22-59213-001
A06-41592-007
A22-59213-021
A06-41592-007
A22-59213-101
A06-41592-007
A22-59213-121
A06-41592-007
A22-59214-001
A06-41592-007
A22-59214-021
A06-41592-007
A22-59214-101
A06-41592-007
A22-59214-121
A06-41592-007
Table 15, Axle Oil Temperature Gauge Conversion
NOTE: Pre-EPA07 vehicles have TAMs (thermocouple amplifier modules) that are not compatible with
the ICU4M, which uses a thermistor. Refer to the instructions in this bulletin for modifying the
pyrometer on pre-EPA07 vehicles.
Pyrometer Conversion
ICU2M (858)
22-46519-000
22-46519-001
22-46519-010
22-46519-011
ICU2M
Trim Ring
Black
Black
Chrome
Chrome
US/Metric
F
C
F
C
ICU4M Conversion
ICU4M (858)
Jumper
A22-59215-001 A06-41592-007
A22-59215-021 A06-41592-007
A22-59215-101 A06-41592-007
A22-59215-121 A06-41592-007
Table 16, Pyrometer Conversion
Modifying the Pyrometer on Pre-EPA07 Vehicles
NOTE: Refer to D06-24539 and BOM 858-C00727 when performing this procedure.
1. Disconnect the batteries.
2. Unplug both connectors on the pyrometer amplifier.
3. Cut both sets of wires at the amplifier.
4. Working with the harnesses on a work bench, connect the red wire to the brown wire, and the pink wire to
the yellow wire.
Page 6
Freightliner Service Bulletin, May 2016
54-289
ICU2M to ICU4M Conversion
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
> Century Class Conventional
> Argosy COE
Cargo
Columbia
122SD and Coronado
Business Class M2
Cascadia
108SD/114SD
Freightliner
Service Bulletin
5. Install shrink tubing on the purple wire, and fold it back into the harness.
6. Remove the thermocouple from the exhaust, and install the new thermistor (p/n 06-53404-000).
7. Attach the spliced harness back on the vehicle.
8. Connect the batteries.
9. Check for proper gauge sweeping during the ignition sequence, and verify that there are no fault codes.
Warranty
This is an informational bulletin only. Warranty does not apply.
Freightliner Service Bulletin, May 2016
Page 7
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TSB/Document ID: sb54289
Replacement Service Bulletin Number:
MFR Communication Date: 2016-05-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
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