Non-volatile memory

TM 9-2320-364-34-1

(d)

When you see the CLBT755 on the bottom line, press the ENTER key. The DDR now begins to

display data. Refer to Step (4) (Data display).

(3)

Non-volatile memory. The ATEC cartridge has a non-volatile memory. This means that stored data are

not lost when the DDR is disconnected from the truck power source.

NOTE

When the DDR establishes communication with the ATEC ECU in a truck, the DDR memory

buffers are all cleared. You cannot use a truck's DDL connector to power your DDR to review

recorded data. The recorded data will be lost.

(a)

When the DDR is connected to an external power source, for instance, at your workbench, the DDR

recognizes that it is not communicating with an ATEC ECU. Under these conditions, the FUNC key

is active. You can access stored data for review and printing. These include ATEC ECU operating

data, diagnostic codes and snapshot data. For example, suppose you have used the DDR to store

snapshot data during a road test. Later, using your workbench power supply, you can review the

recorded data.

(4)

Data display.

(a)

Data readout. The main function of the DDR is to provide you with data from the truck's on-board

computer, called the ATEC electronic control unit (ECU). This is what the DDR automatically does

after the system type has been determined.

If the DDR is unable to establish communication with the ATEC ECU in the truck, you will see a

NO DATA display. Press ENTER to command the DDR to try again.

NO ATEC DATA

RECEIVED

ENTER TO RETRY

Data Readout Window

If communication cannot be established and the NO DATA display reappears, see Step (4)(b).

When communication is established and the correct transmission type input, you will see the

system confirmation screen.

ATEC I SYSTEM

DATA LIST

MT(B) 600 OR V. VH (B)

OR C(L)(B)T 700

Data Readout Window

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