Test 2: Test of Current Consumption of O2 Sensor Heater of Component G3/2 (O2 Sensor Upstream TWC)

Test of current consumption of O2 sensor heater of component G3/2 (O2 sensor upstream TWC)

Risk of injury from rotating parts!
Severe injuries from limbs being jammed or squashed may result from rotating parts and in extreme cases the limbs may be sheared off.

Rules of conduct and protective measures
Do not insert your hand into rotating parts. Wear closed and close-fitting work clothes.

Test prerequisite
- The actual value is not o.k.








Test sequence
- Switch off ignition.
- Unplug the socket 3 at component N3/10 (ME-SFI control module)
- (W16/3 Ground <--> 3.14 (N3/10)
- Ignition ON
- Switch on ignition. (Note: Component M4/7 (Engine and AC electric suction fan with integrated control) runs.)

Specified value
- Amperage [0.5...4.5] A

Question: Is the measured value okay?

No
- The measured value is not o.k.
Possible cause and remedy
- N10/1f54 (Fuse 54)
- Cable of O2 sensor heater of component G3/2 (O2 sensor upstream TWC)
- G3/2 (O2 sensor upstream TWC)
**End of test**

Yes
- The measured value is o.k
Further possible causes of fault
- Signal cable of component G3/2 (O2 sensor upstream TWC)
- G3/2 (O2 sensor upstream TWC)
**End of test**