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Figure 3-5 Sample of read ECU information screen
Read Trouble Code
Read trouble codes (DTCs) that are stored in ECU. For the trouble code, the
diagnostic instrument will give specific detailed definitions and explanations to help
you locate and eliminate the car fault.
Stored Code
Stored codes are the current emission-related DTCs from the ECM of the
vehicle. OBDII Codes have a priority according to their emission severity, with
higher priority codes overwriting lower priority codes. The priority of the code
determines the illumination of the MIL and the codes erase procedure.
Manufacturers rank codes differently, so expect to see differences between
makes.
Pending Code
These are codes whose setting conditions were met during the last drive cycle,
but need to be met two or more consecutive drive cycles before the DTC
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