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Information about Volvo Engine TAD734GE DU & CIU

May. 30, 2018

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.

Volvo engine DU.jpg


Display modes

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

5 (EXIT).

1 Engine

2 Multi

3 Trip

4 Graph

5 Exit

Display modes.jpg


Contrast

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.

Contrast.jpg


Engine

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.

Coolant.jpg


Multi

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.


Multi.jpg


Trip

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.

Trip.jpg


Graph

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.

Graph.jpg

 

Configuration menu

Press button 5 for three seconds to enter the Configuration menu. Navigate with the up and down  arrows, select with the right arrow.

Configuration menu.jpg


Units

- 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

Units.jpg


Alarm Status

List of active alarms, refer to Reading fault codes via the DU (Display Unit)

Alarm status.jpg


Settings

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

RPM

GRAPH RANGE, 2 minutes- 8 hours in the following steps,

2MINS, 10MINS, 30MINS, 60MINS, 2HRS, 4HRS, 8HRS

Setings.jpg


SYSTEM

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.

ABOUT, displays

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


System.jpg


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.

Control Interface Unit.jpg


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

- Oiltemperature

- Batteryvoltage

- 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)

DCU.jpg


With preheating

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).

Without pre-heating

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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