Volvo Engine TAD734GE DU (Display Unit)
The DU is an computerized instrument panel which shows engine working values on an LCD screen. In the display it is possible to show multiple windows with different information, i. g. engine rpm, coolant temperature, fuel consumption and fault messages.
At start up, the display performs a self-test. If an constant signal is heard, the system has discovered a malfunction. The display will work but may act in an unexpected way.
The DU is connected between the engine control unit and the CIU or DCU.
Press any of button l-4 to view the function menu for the buttons, appearing in the lower part of the display. To leave the menu, wait a few seconds or press button
In the display modes Engine, Trip and Graph, it is possible to adjust the contrast. Press button 5 outside the menu and then + (button 4) or - (button 3) to adjust the contrast.
Rpm and coolant temperature is shown in the upper part of the display. In the lower part it will show trip computer and a fuel level indicator, if these functions are installed.
In the multi mode, button 2, the information can be shown in four windows, analogue or digital. The display toggles between the two when button 2 is pressed repeatedly. By pressing button 5, the right arrow, you choose what information to be shown in the different windows. Press repeatedly on the button that correspond to the window, until desired information is shown.
To display the trip computer press button 3, Trip
Trip Fuel, since last reset
Fuel Rate, fuel consumption
Trip hours, since last reset
Engine hours, total amount of operating hours
Reset by pressing button 3 for three seconds until a beep is heard.
The information is shown as graphs. Press button 4 repeatedly to choose what information will be shown. The time interval is set in the Configuration menu.
If the connection is broken there will be a straight line in the display.
Press button 5 for three seconds to enter the Configuration menu. Navigate with the up and down arrows, select with the right arrow.
- PRESSURE: kPa, PS
- VOLUME; LITRE, GAL, Imperial GAL.
Fuel rate is adjusted according to volume unit, L/H, GAL/H, IGAL/H.
- TEMPERATURE; °C, °F
List of active alarms, refer to Reading fault codes via the DU (Display Unit)
LANGUAGE; setting of what language is to be used in the display.
BLEEP; On/Off, setting if pressing the instrument buttons will be followed by a beep or not.
DISPLAY; setting of ENGINE RPM gauges RPM ENGINE, 2500-9000 RPM, in steps of 500
GRAPH RANGE, 2 minutes- 8 hours in the following steps,
2MINS, 10MINS, 30MINS, 60MINS, 2HRS, 4HRS, 8HRS
DEMO, switches the DEMO mode ON/OFF
RESTORE DEAFAULTS, reset all configuration to default values.
COM VIEWER, displays latest message on communication ports
PROG TX, transfers content of the application on
Flash memory to other CAN units on the same CAN bus.
ID NO - display serial number
EEPROM - number of write on EEPROM
VERS - software version number
CHK - Flash memory checksum
PART No - Volvo software part number
SOURCE - source of received data
LABEL - Allocated Label on the same bus
CIU (Control Interface Unit)
The CIU is a "translator" between the control unit (EMS) and the customer's own control panel. The CIU has two serial communication links, one fast and one slow.
The fast one is a so-called CAN link. All data related to instruments, indication lamps, connectors and potentiometers is controlled by this link.
The slow link manages diagnostic information for flashing codes etc.
Easy Link Instruments
The following Easy Link instruments are available
- Tachometer / hours counter (fault codes are also displayed on the tachometer display when the diagnostic button is pressed)
- Coolant temperature
- Oil pressure
- Alarm panel
- Turbo pressure
DCU (Display Control Unit)
The pre-heating time is adjusted to suit engine temperature, and may last up to 50 seconds both before and after starting.
The starter motor connection time is maximized to 20 seconds. After that, the starter motor circuit is cut for 80 seconds to protect the starter motor against overheating.
NOTICE! Preheat must be activated when the temperature is below o °C (32°F)
1 Press the ON/OFF button (6)
2 Press the SEL button (7) to come to the main menu
3 Navigate to Preheat with the browse button (9). Press the SEL button (7)
4 In the Preheat menu, press the SEL button (7) to select pre-heating; the text "Preheat active please wait" is shown in the display.
5 Wait until the text disappears and then press the START button (2).
1 Press the ON/OFF button (6)
2 Press the START button (2).
Warm through the engine at idle (1,500/1,800 rpm)
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