30 Scan Tool User Guide
Read Codes
6: Diagnostic Trouble Codes
Code History (Chrysler/Jeep)
The Code History function shows how many times
the engine has been started since each fault was first
detected. From this information, you can determine
if a DTC is current or intermittent.
1 Follow the steps in Read and Display Codes on page
27 to display the Diagnostic Trouble Code History
screen.
Figure 6.7: Diagnostic Trouble Code History Screen
2 View the list and optionally print it.
3 Be aware of the following:
• The “first” DTC in the list is the oldest.
• The number of engine starts (cycles) is since
the code was first detected.
• If engine starts is 1, the DTC occurred during
the last ignition cycle and is current.
• If engine starts is 2 or more, the code is present
as an intermittent code, but is not current.
• If no codes are found, a number shows how
many engine starts have occurred (up to 255
times) since the codes were last cleared.
4 When finished, use the EXIT key to return to previous
screens.
Trip Counts (Chrysler/Jeep)
The Trip Counts function tells you how many “trips”
have occurred since the DTCs were last cleared.
1 Follow the steps in Read and Display Codes on page
27 to display the Trip Counts screen.
Figure 6.8: Trip Counts Screen
2 Be aware of the following:
• Warm-ups are the number of times the engine
has reached operating temperature.
• Trips are the number of times the engine has
been warmed-up and driven long enough to
meet critical system conditions.
3 When finished, use the EXIT key to return to previous
screens.
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