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Premier Diagnostic & TPMS Platform I80TS User's Manual V1.0
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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 engines 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. Press Read Codes from Select Diagnostic Function menu. A code list
including code number and its description displays. The red icon
means there is help information available for the code. The green icon
means there is freeze frame available.
Figure 5-11 Sample Trouble Code Screen
● Freeze Frame- select one fault code from the code list and click Freeze
Frame button on the screen. The screen will display freeze frame data, a
snapshot of critical vehicle operating conditions automatically recorded by
the on-board computer at the time of the DTC set. It is a good function to
help determine what caused the fault.
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