2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1263

2070

Component B14 (Ambient temperature display temperature sensor) has a short circuit to ground. (P0072)

Possible cause:

- B14 (Ambient temperature display temperature sensor)

Affected functions:

- Power generation

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Test 1: Ambient temperature

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

1. Ambient temperature

Test 1.1: Check component B14 (Ambient temperature display temperature sensor).

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

1.1. Check component B14 (Ambient temperature display temperature sensor).

Test prerequisites

- The power supply of component N10/1 (Driver-side SAM control unit with fuse and relay module) is OK.

- Fault code 9063 is current, and (or) at least one of the relevant actual values is not OK.

Test sequence

- Detach coupling at component B14 (Ambient temperature display temperature sensor).

- Connect resistance simulator to the connector of component B14 (Ambient temperature display temperature sensor).

- Connect resistance substitution unit between sockets (B14)1 and (B14) 2

- Adjust resistance values one after another and compare them with the actual value.

Status of relevant actual value:

- B14 (Ambient temperature display temperature sensor):Warning! Communication with ECU required.

Specified value

- Resistor9.6 kohms:Temperature: [0锟斤拷 C]

- Resistor5.9 kohms:Temperature: [10锟斤拷 C]

- Resistor3.7 kohms:Temperature: [20锟斤拷 C]