Condition for fault identification

Test condition:

The fault is recognized when an activation signal is transmitted to the heater for the oxygen sensor behind the catalytic converter and an electrical defect is present.

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:

• None

Time condition:

• 10 sec. after engine start

Other conditions:

• Engine ON