Automotive Diagnostic & TPMS Scanner NT809TS User's Manual V1.0
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Figure 5-9 Sample Function Menu Screen
5.2 Diagnostic Operations
After a system is selected and the scanner establishes communication with
the vehicle, the Function Menu displays. Generally the menu options are:
●
Read Codes
●
Clear Codes
●
Live Data
●
ECU Information
NOTE
Not all function options listed above are applicable to all vehicles. Available
options may vary by the year, model, and make of the test vehicle.
5.2.1 Read Codes
Read Codes
menu lets you read trouble codes found in the control unit.
There are 4 types of code status:
●
Present/Permanent/Current
●
Pending
●
History
Present/Permanent/Current codes stored in a control module are used to
help identify the cause of a trouble or troubles with a vehicle. These codes
have occurred a specific number of times and indicate a problem that
requires repair.
Pending codes are also referred to as maturing codes that indicate
intermittent faults. If the fault does not occur within a certain number of drive
cycles (depending on vehicle), the code clears from memory. If a fault occurs
a specific number of times, the code matures into a DTC and the MIL
illuminates or blinks.
History codes are also referred to as past codes that indicate intermittent
DTCs that are not currently active. Code history is number of engine starts
since DTC(s) were first detected (to see if they are current or intermittent).
