Diagnostic codes -726280179

TM 9-2320-364-20-1

Now, when you use the UP and DOWN arrows to scroll the data list, OIL TEMP remains

frozen in position on the third line of the display. Although the item is frozen, its value is able

to change, according to system operation.

RETARD REQUEST YES

RETARD COMMAND YES

OIL TEMP 123F 123C

SPECIAL INPUT OFF

Data Readout Window

Now, suppose you also want to watch SPECIAL INPUT. Use the UP and DOWN arrow keys

to scroll the list. As you can see above, the third line remains frozen. Eventually, your item

appears on line 4. Press numerical key 4. The square will appear to indicate that line 4 is also

frozen. You can continue doing this until you have frozen data on all four lines.

(d)

Unfreezing data. There are two ways to unfreeze data. To unfreeze just one line, press the

numerical key corresponding to the line you want to unfreeze. The solid square disappears and the

line can now be scrolled. To unfreeze the entire display at once, press the numerical key 0 (zero).

All solid squares disappear and all lines are unfrozen.

(e)

Functions. The DDR's main purpose is to display data and it does this automatically. The DDR can

also perform several other jobs, called functions. These functions are of two types. Some of them

relate to the way DDR communicates with the ATEC ECU in the truck, such as diagnostic codes

and ranges. Other functions relate to the way the DDR itself operates, such as Snapshot, RS-232

Serial Port and Contrast Adjustment.

(f)

Use of the FUNC key. For access to the functions, press the FUNC key. The DDR is programmed

to provide access to only those functions that apply. If you see a function displayed, it is available

to use. If you do not see a function displayed, it does not apply.

(5)

Diagnostic codes. When the ENTER key is pressed on the DIAGNOSTIC CODES selection, the DDR

will display the code number, along with a description of the code(s) stored in the ATEC ECU.

(a)

When viewing DIAG CODES in the normal data list, the number on the left is usually a more

severe code than the code on the right side of the display. If both memory locations have a code

stored in the ATEC ECU, the arrows will appear on the bottom line of the code display screen.

(b)

The readout contains the name of the system or component that caused the code to be set.

ATEC I DIAG CODES

SPEED SENSOR

CODE 22

Data Readout Window

(c)

Press the FUNC key to exit.

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