54.02.

400 Especificaciones 

La Figura 1 es un esquema general de la ICU3 cuando está conectada al vehículo.

Los dos conectores del mazo de cables de la cabina principal ICU3 son de color rosa y se
conectan a las clavijas ubicadas en el centro de la unidad en la parte posterior. El conector n. °
1 tiene 24 cavidades numeradas de A1 a A12 y de B1 a B12. Ver
tabla 1 .
El conector n. ° 2 tiene 32 cavidades, numeradas de C1 a C16 y de D1 a D16. Ver
tabla 2 .

Fig.1, Esquema general de ICU3

Asignaciones de clavijas del conector n.o 1 de ICU3, clavijas A1 a

B12

Alfiler
Descripción
Cable

A1
Potencia de retroiluminación del panel (+)
29A

A2
Entrada de limpiaparabrisas con interruptor 473C

de señal de giro multifunción

A3
A3 Reservado
18B

A4
Indicador de alta temperatura de la 30A

transmisión

A5
Indicador de temperatura de escape alta
492L

A6
Nivel de la lavadora
320A

 Asignaciones de clavijas del conector n.o 1 de ICU3, clavijas A1 a

B12

Alfiler
Descripción
Cable

A7
Señal de bobina del relé del precalentador 431B1

n. ° 1 (indicador opcional n. ° 3)

A8
Indicador opcional n. ° 4
-

A9
MIL
492H

A10
Temperatura del eje trasero de avance (+)
42

A11
Temperatura del eje trasero de avance (-)
42G

A12
Indicador de luz de carretera
222A

B1
Lámpara de advertencia de giro de la rueda 376S

(indicador opcional n. ° 5)

B2
Sensor de temperatura del eje trasero 43

trasero (-)

B3
Reservado

B4
Sensor de temperatura del eje trasero 43G

trasero (+)

B5
Entrada común del interruptor de señal de 473

giro multifunción

B6
Interruptor de señal de giro multifunción 473A

Entrada de señal de giro

B7
Interruptor de señal de giro multifunción 473B

Entrada de luz de carretera / arandela

B8
Indicador opcional n. ° 6
-

B9
Entrada del interruptor de control de 440D

crucero

B10
Reservado
-

B11
Indicador ABS del tractor 376L

 Asignaciones de clavijas del conector n.o 1 de ICU3, clavijas A1 a

B12

Alfiler
Descripción
Cable

B12
Entrada de zumbador opcional
29G

Tabla 1, Asignaciones de clavijas del conector n.o 1 de ICU3, clavijas

A1 a B12

Asignaciones de clavijas del conector # 2 de ICU3, clavijas C1 a D16

Alfiler
Descripción
Cable

C1
Gestión inactiva
472N

C2
Reservado
-

C3
Reservado
-

C4
Reservado
-

C5
Indicador de freno de estacionamiento
125S

C6
Potencia de impulsión del indicador 437A

satelital

C7
Tierra de impulsión del indicador de GND

satélite

C8
Left Turn Indicator
38J

C9
Water In Fuel Indicator
286

C10
REGEN Indicator
492J

C11
Check Transmission
497A

C12
Transmission Oil Temperature (–)
30G

C13
Transmission Oil Temperature (+)
30

C14
Optional Indicator #1
—

C15
Check Engine Warning Lamp
440A

Asignaciones de clavijas del conector # 2 de ICU3, clavijas C1 a D16

Alfiler
Descripción
Cable

C16
Stop Engine Warning Lamp
440S

D1
Fuel Level (+)
47

D2
Fuel Level (–)
47G

D3
Panel Backlight Ground (–)
GND

D4
Optional Indicator #9
—

D5
J1939 (+)
1939+

D6
Satellite Gauge Illumination
437

D7
Satellite Gauge Data
437K

D8
Right Turn Indicator
38K

D9
J1939 (–)
1939–

D10
Optional Seat Belt (EPA10)
435

D11
Reserved
—

D12
Trailer ABS Warning Lamp
376F1

D13
ICU System Ground (–)
GND

D14
Battery Power (+)
81

D15
Ignition Power (+)
81C

D16
Headlamp Power (+)
81C

Table 2, ICU3 Connector #2 Pin Assignments, Pins C1 Through D16

Fuel Level Sensor Resistance

Sensor Resistance in Ohms

Gauge Reading

Acceptable Range
Nominal

 Fuel Level Sensor Resistance

Sensor Resistance in Ohms

Gauge Reading

Acceptable Range
Nominal

Empty Stop
244.0 to 249.0
246.5

Empty
232.0 to 239.2
235.6

1/8
190.8 to 196.9
193.8

1/4
149.6 to 154.5
152.1

3/8
126.1 to 129.0
127.5

1/2
102.5 to 103.5
103.0

5/8
84.4 to 85.7
85.0

3/4
66.2 to 67.8
67.0

7/8
47.8 to 49.2
48.5

Full
29.4 to 30.6
30.0

Table 3, Fuel Level Sensor Resistance

Transmission Oil Temperature Sensor Resistance

Gauge Sensor Gauge Sensor

Temperature in Resistance in Temperature in Resistance in
°F
Ohms
°C
Ohms

125
3318
60
2490

163
1626
80
1255

200
837
100
680

238
460
120
390

275
267
140
234

313
162
160
145

 Transmission Oil Temperature Sensor Resistance

Gauge Sensor Gauge Sensor

Temperature in Resistance in Temperature in Resistance in
°F
Ohms
°C
Ohms

350
102
180
95

Table 4, Transmission Oil Temperature Sensor Resistance

NOTE:
Fig. 2
and
Fig. 3
are for reference only; the measurements are not exact.

Fig. 2, Transmission Oil Temperature Sensor

Resistance (°F)

Fig. 3, Transmission Oil Temperature Sensor

Resistance (°C)

Axle Oil Temperature Sensor Resistance—

Standard Gauge

Sensor Resistance:
Gauge Temperature

ohms

100°F
5933

125°F
3419

150°F
2079

175°F
1283

200°F
837

225°F
557

250°F
380

275°F
267

300°F
190

Table 5, Axle Oil Temperature Sensor Resistance—

Standard Gauge

NOTE:
Fig. 4
is for reference only; the measurements are not exact.

Fig. 4, Axle Oil Temperature Sensor

Resistance (°F)

Axle Oil Temperature Sensor Resistance—Metric

Gauge

Sensor Resistance:
Gauge Temperature

ohms

30°C
8060

45°C
4465

60°C
2490

75°C
1503

90°C
915

105°C
595

120°C
390

135°C
267

150°C
185

Table 6, Axle Oil Temperature Sensor Resistance—

Metric Gauge

NOTE:
Fig. 5
is for reference only; the measurements are not exact.

Fig. 5, Axle Oil Temperature Sensor

Resistance (°C)

DEF Level Sensor Resistance Measurement

 Engine Type
DEF Level Sensor
Detroit

Resistance Measurement

Cummins

Engine Type
Detroit
Cummins

04-27881-
000

A04-27943- 04-30774-
000
001

A04-27445- A04-27942-
Part Number
A04-27943-
000
000

001
04-30798-
04-30774- 001

000

04-30798-
000

Test at Sensor Connector Pins

NOTE: Pins are numbered left to 1 and 2

1 and 4
1 and 4
1 and 2

right.

Resistance:
Float at Top of Travel
~19800Ω
~68Ω
~68Ω
~68Ω

Resistance:
Float at Center of Travel
~2035Ω
~730Ω
~743Ω
~742Ω

Resistance:
Float at Bottom of
~240Ω
~4812Ω
~4809Ω
~4732Ω

Travel

Table 7, DEF Level Sensor Resistance Measurement

NOTE:
Fig. 6
and
Fig. 7
are for reference only; the measurements are not exact.

Fig. 6, Cummins DEF Level Sensor

Resistance

Fig. 7, DDC DEF Level Sensor Resistance

rESEt EE Procedure
To reset the EE memory in the ICU3, perform the following procedure. This will reset the
memory to "forget" all the devices that have been learned.
 1. Press the mode/reset button until the display shows SEt UP.

2. Hold the button until the display makes a beep and the word service appears. Depending
on the options programmed, some other word may also appear.

3. Hold the button until the display shows rESEt.

4. Press the button once quickly so that EE is also displayed. This is the rESEt EE screen.
5. Hold the button until donE is displayed.

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