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AutoMaster Pro Manual_English_V1.01
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. A “The selected mode is not supported!” message
displays if the option is not applicable to the vehicle under test.
Read Codes menu lets you read trouble codes found in the control unit. Typical menu options
● Present/Permanent/Current Codes
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
Code history is number of engine starts since DTC(s) were first detected (to see if they are
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.
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