Casio Cassiopeia IT-70 User Manual download pdf (Page 19)

6.0 Diagnostic Trouble Codes (DTC)

The Trouble Codes Screen displays the vehicle’s MIL Status, DTC Count, Stored DTCs

and Pending DTCs.

What is a DTC? Automobile on-board computers have a built in self testing system called

self-diagnosis which means the on-board computer will monitor many or all of the vehicle’s

sensors and controlled devices for proper operation. A diagnostic trouble code (DTC) is

detected and set when one of the monitored devices is not functioning properly. On OBD

II vehicles there are two different types of DTCs: Stored and Pending. See Section XI. for

more information on DTCs.

MIL Status - The status of the vehicle’s MIL (Malfunction Indicator Lamp) is displayed here.

DTC Count - Displays the total number of emission related DTCs currently stored in the vehicle.

Stored DTCs - All of the vehicle’s stored DTCs are listed in this section.

Pending DTCs - All of the vehicle’s pending DTCs are listed in this section.

NOTE: The Make setting in the Vehicle Communications screen is used for determining the description of

manufacturer specific DTCs. If manufacturer specific DTCs are displayed (P1XXX), the correct Make must be

selected in the Vehicle Communications screen to ensure that the correct description is being displayed in the

Trouble Code grids. See section 2.0 Vehicle Communications for more information on selecting the vehicle’s

Make. See Section XI. for more information on DTCs.

Clear DTCs Button - Tap on this button to clear (erase) the Stored and Pending DTCs, Freeze

Frame Data, Oxygen Sensor Test Data, and Inspection and Maintenance Monitors from the

vehicle’s on-board computer. After tapping this button, a confirmation screen is displayed to

inform the user which vehicle information will be erased. Make sure that the vehicle’s ignition

key is in the ON position and the vehicle’s engine is not running. For some vehicles unless

these conditions are met the DTCs will not be cleared. Tap on the Yes button to continue with

the clearing process or No to cancel.

Freeze Frame Button - Tap on this button to display the vehicle’s Freeze Frame data. See

section 7.0 Freeze Frame for more information.

DTC Library Button - Tap on this button to display the DTC Library screen. See the section 6.1 for more

information.

6.1 DTC Library

The DTC Library Screen allows you to look up the description for a DTC Number. Both

generic and manufacturer specific DTCs can be looked up. Use the DTC Library button in

the DTC Screen or View\DTC Library from the menubar to open the DTC Library. See

Section XI. for more information on DTCs.

Make - Tap on the arrow to the right of the box to open a drop down box listing vehicle

makes. It is important that you select the correct make if you are looking up a

manufacturer specific DTCs (P1XXX) because manufacturer specific DTC’s descriptions

may differ between manufacturers. Choose Generic as the make to look up generic

(P0XXX) codes.

Search - Type in a DTC number, word that you are looking for or start of a word or DTC in

this box and then tap on the Search button. The results of the search will be displayed in

the grid below.

NOTE: Delete the text you entered in the Search box and then select the Search button to return to the original

look up.

DTC Code and Description grid - The DTC number and corresponding description is displayed in the grid.

The scroll bar to the right of the DTC grid can be used to manually scroll through the DTC and description list.

The scroll bar on the bottom of the grid can be used to move the grid left and right in order to see the complete

description.

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Casio Cassiopeia IT-70 User Manual Page 19

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