Records diagnostic data related to the engine control system in the PCM.
The diagnostic data recording/erasing conditions are determined by the number of drive cycles set for each item. (See ON-BOARD DIAGNOSTIC SYSTEM TEST MODE [SKYACTIV-G 2.5].)
Diagnostic data which can be recorded in the PCM are as follows:
Number of DTCs
DTC
Pending code
Freeze frame data
On-board diagnostic system diagnosis condition
On-board monitoring test results
Another method for erasing diagnostic data is by using the memory clearing function of the external tester.