ICU2M

A keypad located on the auxiliary dash panel controls the ICU2M. See Fig.. This 10-key keypad is used to:

• call up information on mobile screens;

• navigate from screen to screen;

• set up the display;

• record significant data.

The odometer is a seven-digit display with one decimal point after the sixth digit, allowing it to display tenths of miles (or kilometers). When first installed, the odometer starts at 0.0 miles (or kilometers). When replaced, the odometer starts again from 0.0.

Fig. 1, ICU4M Keypad

Alert Screens

Alert screens can appear at any time, even when the vehicle is moving. They override the regular screen display. They are warnings, cautions, or other messages that require the driver's attention, but not all of them are critical to the operation of the vehicle. The word Warning or Alert sometimes flashes on the display screen above the alert text. More important messages take priority over less important messages.

Parking Brake On

This warning message and an audible warning come on whenever the parking brake is applied and the vehicle is moving faster than 2 mph (3 km/h). The screen and audible warning go away only when the parking brake is released, or speed is reduced below 2 mph (3 km/h).

Low Oil Pressure

This warning message and an audible warning come on whenever the oil pressure falls below the minimum oil pressure, whether the vehicle is idling or in motion. See Fig.. To dismiss the message, press any button on the keypad.

If low oil pressure is detected during the ignition sequence, it displays as an active fault and the alert screen does not appear. After 30 seconds, this message displays again.

Note: All Alert Screens follow this format.

Fig. 2, ICU2M Alert Screen: Low Oil Pressure

Low Coolant Level

This warning message and audible warning activate whenever the coolant level falls below a preset point.

High Coolant Temp

This message and an audible warning come on whenever the engine coolant temperature exceeds the maximum allowable temperature.

If high coolant temperature is detected during the ignition sequence, it displays as an active fault and the alert screen does not appear. After 30 seconds, this message displays again.

Low Voltage

On some vehicles, this optional message and an audible warning come on whenever the ICU detects a low voltage condition.

Faulty Speedo Gauge

This message is displayed when the system detects a faulty speedometer. This becomes the default screen, and vehicle speed is displayed as a digital readout at the bottom left of the screen. All other screens and functions operate normally.

Recirc Mode Engaged/Provide Fresh Air

The Recirc Mode Engaged message appears whenever recirculated air is selected on the fresh/air recirculation switch or the air circulation switch is rotated to the maximum air conditioning position. It displays one time only for seven seconds. It notifies the driver that recirculated air is being used and that fresh air needs to be provided after 20 minutes.

If fresh air is not provided after 20 minutes, Provide Fresh Air is displayed. It displays for seven seconds approximately every four minutes until the driver selects fresh air on the fresh/air recirculation switch or rotates the air circulation switch away from maximum air conditioning. See Constant Discharge Temperature Control for detailed operating instructions for the heater/air conditioner.

Low Fuel Level

The ICU continuously monitors fuel level. When the fuel level drops to 1/8th full, the word Warning flashes on the message display screen above the low fuel alert.

Turn Signal On

This message (the audible warning is optional) appears whenever the turn signal remains on beyond a preset time or distance traveled.

To dismiss this message, either turn off the turn signal or press any button on the keypad.

Service Warnings

Service warning screens display during the ignition sequence and indicate that a service interval has been reached or exceeded and maintenance is required. The messages may indicate the number of miles (KM) or hours until the next required service or, once passed, the number of miles (KM) or hours ago that maintenance should have been performed. The ICU2M can be programmed using ServiceLink to generate service warnings in either miles or hours, but not both.

No Datalink Activity

This message appears whenever the datalink is not receiving data. If the condition persists, take the vehicle in for service as soon as possible to discover the cause of the problem.

Mobile Screens

The following screens are available when the parking brake is off (when the vehicle is mobile) and no active fault codes are found. Press the appropriate button on the keypad to display one of the mobile screens.

• trip miles and hours

• fuel used and average MPG

• leg miles and hours

To reset a mobile screen, push the Set/Reset button twice within a 6-second period while the screen is displayed. A confirmation screen will display after you press the button once.

Stationary Screens

The following screens are available when the parking brake is applied (vehicle is stationary) and no active fault codes are found. Each set of stationary screens has a title screen followed by one or more data screens.

To move forward and backward through these screens, use the three arrow buttons on the keypad. See Fig., see Fig. and see Fig. for stationary screen navigation.

• Trip Information: miles, hours

• Fuel information: fuel used, average MPG

• Engine information: engine miles and hours, engine gallons and PTO gallons

• Diagnostic information: active faults, historical dash faults

• Setup Information: target MPG, brightness, language, units of measurement

• Vehicle information: datalink activity/status, ICU part number, software ID number

Fig. 3, ICU2M Engine Information and Diagnostic Information

Fig. 4, ICU2M Setup Information and Vehicle Information

Fig. 5, ICU2M Trip Information, Fuel Information, and Engine Information