P20C7

G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12) , No sensor status change

Test 1: Check component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12).

1. Check component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12).

Test 1.1: Check component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12) using actual value.

Test 1.2: Test current consumption of heating of component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12).

1.1. Check component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12) using actual value.
Warning!Communication with ECU required.


1.2. Test current consumption of heating of component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12).
Test prerequisite

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

- Switch off ignition.
- Disconnect coupling 4 at component N3/10 (ME-SFI [ME] control unit).
- Measure direct current with multimeter between ground and socket (N3/10) 4.31
- Switch on ignition.
Warning!Perform the measurement only for a short time so that component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12) does not overheat.Specified value

- Amperage[0.6...3.0] A
Question

- Is the measurement value OK?







YES
The measurement value is OK.Further possible causes of fault

- Signal cable of component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12)
- G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12)
End of test

NO
The measurement value is not OK.Possible cause and remedy

- Voltage supply of component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12)
- Lines to component G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12)
- G3/12 (left O2 sensor, downstream TWC, for cylinders 10-12)
End of test