Condition for fault identification

Test condition:

The fault is recognized when an electrical malfunction is present in the oxygen sensor behind the catalytic converter.

Potential problem source(s):

• Defective wiring harness
• Oxygen sensor behind catalytic converter defective
• Defective DME

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• Engine switched off at temperature higher than 60 °C
• Engine starting temperature less than 40 °C, then engine warmed to normal temperature
• Exhaust-gas temperature at post-catalyst oxygen sensor not higher than 800 °C

Time condition:

• Active heating activation more than 1 min.

Other conditions:

• Engine ON