2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 680

Test prerequisite

- The actual value is not o.k.

Test sequence

- Switch off ignition.

- Disconnect connector at component B11/4 (Coolant temperature sensor).

- Measure resistance with multimeter between pins ( B11/4 ) 1 and ( B11/4 ) 2

Specified values

- Resistor(20锟斤拷 C): [3030...3130]ohms

- Resistor(30锟斤拷 C]: [1950...2050]ohms

- Resistor(40锟斤拷 C): [1275...1375]ohms

- Resistor(50锟斤拷 C): [850...950]ohms

- Resistor(60锟斤拷 C): [600...650]ohms

- Resistor(70锟斤拷 C): [420...460]ohms

- Resistor(80锟斤拷 C): [305...335]ohms

- Resistor(90锟斤拷 C): [220...240]ohms

- Resistor(100锟斤拷 C): [160...180]ohms

- Resistor(110锟斤拷 C): [120...140]ohms

Question

- Are the measurement values OK?

YES

The measurement values are OK.End of test

NO

The measurement values are not OK.Possible cause and remedy

- B11/4 (Coolant temperature sensor)

End of test

0860

B11/4 (Coolant temperature sensor) : Shunt fault / Sensor characteristic curve (P0116)

Possible cause:

- B11/4 (Coolant temperature sensor)

Affected functions:

- Engine cooling

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Test 1: Check component B11/4 (Coolant temperature sensor).

1. Check component B11/4 (Coolant temperature sensor).

Test 1.1: Check component B11/4 (Coolant temperature sensor) using actual value.

Test 1.2: Check signal lines on component B11/4 (Coolant temperature sensor).

Test 1.3: Check internal resistance of component B11/4 (Coolant temperature sensor).

1.1. Check component B11/4 (Coolant temperature sensor) using actual value.

Test prerequisite

- The actual value is not o.k.

Test sequence

- Switch on ignition.

Status of relevant actual value:

- Coolant temperature:Warning! Communication with ECU required.

- Coolant temperature sensor ( Signal voltage ):Warning! Communication with ECU required.