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AutoMaster Pro NT414 Manual_English_V1.00
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Present/Permanent/Current Codes
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Pending Codes
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History Codes
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Code History
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Self Diagnostic
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)
Self diagnostic lets you manually activate system tests that check for DTCs. Usually it includes a
KOEO (Key-on, engine-off ) test and a KOER (key-on, engine-running) test.
To read codes from a vehicle:
1.
Scroll with the arrow keys to highlight
Read Codes
from Function Menu and press the
ENTER
key. A code list including code number and its description displays.
Figure 4-20 Sample Function menu screen
2.
Use the up and down arrow keys to scroll through data to select lines, and left and right arrow
keys to scroll back and forth through different screens of data.
Figure 4.21 Sample Code Screen
