2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 858

1102

B14 (Ambient temperature display temperature sensor) : Short circuit to ground

Possible cause:

- B14 (Ambient temperature display temperature sensor)

- B2/5 (Hot film mass air flow sensor)

Affected functions:

- Engine output

-------------------------------------------------

Test 1: Check component B2/5b1 (Intake air temperature sensor).

Test 2: Check component B14 (Ambient temperature display temperature sensor).

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

Test 1.1: Check component B2/5b1 (Intake air temperature sensor) using actual value.

Test 1.2: Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.

Test 1.3: Check internal resistance of component B2/5b1 (Intake air temperature sensor).

1.1. 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.