G3/4 (Right O2 Sensor, Before TWC [KAT])

G3/4 (Right O2 Sensor, Before TWC [KAT]) :

Check Component G3/4 (Right O2 Sensor, Before TWC [KAT]).

Test 1 Check Actual Value G3/4 (Right O2 Sensor, Before TWC [KAT])
Test 2 Test of Current Consumption of O2 Sensor Heater of Component G3/4 (Right O2 Sensor, Before TWC [KAT])


1 Check Actual Value G3/4 (Right O2 Sensor, Before TWC [KAT])

Test requirement
- Engine at idle speed
- 80 °C If coolant temperature > , run engine at idle speed for about 2 minutes.

Status of the relevant actual values:
- Temperature of coolant: Note! Communication with ECU required
- O2 sensor voltage, before TWC right: Note! Communication with ECU required
- O2 sensor heater, before TWC: Note! Communication with ECU required

Specified value:
- O2 sensor signal varies within the range from [-200 to +1000] m V by more than 300 m V after 2 min at idle speed.
- O2 sensor heater, before TWC : ON

Question
- Are the actual values o.k.?
Yes
The actual values are okay. ** End of Test **
No
The actual values are not okay.
Possible cause and remedy
- Test of current consumption of O2 sensor heater of component G3/4 (Right O2 sensor, before TWC [KAT])
- Signal cable of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])

** End of Test **


2 Test of Current Consumption of O2 Sensor Heater of Component G3/4 (Right O2 Sensor, Before TWC [KAT])

Warning!
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 requirement
- The actual value is not o.k.

Test sequence
- Switch off ignition.
- Detach socket A at component N3/10 (ME-SFI control module).
- (N3/10) A.3 <--> A.5 (N3/10)
- Switch on ignition. (Note! Component M4/3 (engine/AC electric suction fan) runs)

Specified value
- Amperage[1.0...4.5] A

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Signal cable of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])
No
The measured value is not o.k.
Possible cause and remedy
- K40/7f30 (Fuse 30)
- Cable of O2 sensor heater of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])

** End of Test **