188.8.131.52. System of onboard diagnostics
The design and work of system of onboard diagnostics is in essence borrowed from the modern MPV (LW) model with the GY/FS engine, except for the conditions given below.
Diagnostic codes, controlled parameters and parameters of modeling are changed according to rules.
KOEO/KOER self-checking function is introduced. Therefore the existing malfunction or successful repair are confirmed at once.
Process of storage of incomplete codes is changed as follows.
1 type of a riding cycle
On the modern MPV (LW) model with the GY/FS engine incomplete codes are inaccessible. In the Mazda 3 model (GG), however, the incomplete code is remembered in the PCM block during a riding cycle.
2 type of a riding cycle
On the modern MPV (LW) model with the GY/FS engine incomplete codes are erased at record of diagnostic codes. In the Mazda 3 model (GG) even if the diagnostic code remains, the PCM block does not erase an incomplete code before emergence of the normal state (malfunction is eliminated).
The operating mode of a control lamp of MIL of a riding cycle 2 types is changed as follows:
Mazda 3 model (GG)
The PCM block decides that in the first riding cycle there is a malfunction when the diagnostic code which was written down in the PCM block during the previous riding cycles is found.
Modern MPV (LW) with the GY/FS engine
The PCM block decides that malfunction is available in the second riding cycle.