Test 2: Test of Current Consumption of O2 Sensor Heater of Component G3/1 (O2 Sensor Downstream TWC)

Test of current consumption of O2 sensor heater of component G3/1 (O2 sensor downstream 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.
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- [5.5] 5<-->105 [4.20]
- Switch on ignition. Note: Component M4/7 (Engine and AC electric suction fan with integrated control) runs.

Specified value
- Amperage [0.5...3.0] 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 G3/1 (O2 sensor downstream TWC)
- G3/1 (O2 sensor downstream TWC)
- N10/1 (Front SAM control module with fuse and relay module)
**End of test**

Yes
- The measured value is o.k.
Further possible causes of fault
- Signal cable of component G3/1 (O2 sensor downstream TWC)
- G3/1 (O2 sensor downstream TWC)
**End of test**