Display Group 035 & 036

Three way catalytic converter diagnosis, bank 1 & 2

Notes on display groups 035 and 036:
- If the value of the three way catalytic converter diagnosis is not set to "0" in display group 029, display field 1 during regeneration of the readiness code and/or there is a malfunction in DTC memory that relates to the three way catalytic converter, display groups 035, 035 and 044 are used to carry out a selective diagnosis.
- At each start, when the diagnostic conditions are fulfilled (display group 044) the Engine Control Module (ECM) checks the deterioration rate of the three way catalytic converter by the heated oxygen sensors in front of and behind the three way catalytic converter.
- Display fields 1 and 2 display the largest and smallest rate of deterioration of all the diagnoses carried out. If a higher or lower rate of deterioration is recognized at the next diagnosis, the current value is overwritten.
- The number of three way catalytic converter diagnoses (display field 3) is incremented each time a diagnosis is carried out, no matter whether the diagnosis is considered OK or not OK.
- If the rate of deterioration is recognized as OK during the first diagnosis, the number of three way catalytic converter diagnoses is increased by the value of "1", and the diagnosis is discontinued.
- If the limit value of 50% is exceeded, the diagnosis is recognized as not OK. In this case, the rate of deterioration continues to be checked, while the number of three way catalytic converter diagnoses is incremented with each additional diagnosis.
- Display field 4 shows the current rate of deterioration recognized at the last diagnosis.
- The display values are only reset by erasing the DTC memory Selective observation time periods can be de fined by resetting the display values.