2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 870

1.2. Check component B2/5b1 (Intake air temperature sensor).

Test 1.2.1: Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test 1.2.2: Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.

Test 1.2.3: Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.2.1. Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test prerequisites

- Switch off ignition.

- Leave vehicle with engine hood open for > 12 h.

Note

- The test prerequisites must be fulfilled for the test result to be meaningful.

Test sequence

- Switch on ignition.

Status of relevant actual value:

- Intake air temperature:Warning! Communication with ECU required.

- Ambient temperature:Warning! Communication with ECU required.

Specified value

- The intake air temperature may be max. 5锟斤拷 C below the ambient temperature or 15锟斤拷 C above the ambient temperature.

Question

- Is the actual value for intake air temperature OK?

YES

The actual value is okay.Further procedure

- If only fault codes 1599 and 1600 occur in control unit ME-SFI, erase the fault memory.

- The component may not be replaced.

End of test

NO

The actual value is not o.k.Possible cause and remedy

- Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module N3/10 (ME-SFI [ME] control unit).