2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1255

- Measure direct current with multimeter between sockets [F.4] 100 and [M.54] 54 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Amperage[0.6...1.2] A

Question

- Is the measurement value OK?

YES

The measurement value is OK.End of test

NO

The measurement value is not OK.Possible cause and remedy

- N10/1f57 (Fuse 57)

- N10/1kR (Circuit 87 relay, engine)

- Check lines from component N3/10 (ME-SFI [ME] control unit) to component Y110 (Three-disk thermostat valve).

- Y110 (Three-disk thermostat valve)

End of test

2066

Component B11/4 (Coolant temperature sensor) has a short circuit to positive or an open circuit. (P0118)

Possible cause:

- B11/4 (Coolant temperature sensor)

Affected functions:

- Engine diagnosis

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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.

Specified values

- Voltage[20锟斤拷 C]: [3.45...3.32] V

- Voltage[30锟斤拷 C]: [2.93...2.82] V

- Voltage[40锟斤拷 C]: [2.41...2.32] V

- Voltage[50锟斤拷 C]: [1.93...1.86] V

- Voltage[60锟斤拷 C]: [1.51...1.46] V

- Voltage[70锟斤拷 C]: [1.18...1.13] V

- Voltage[80锟斤拷 C]: [0.90...0.87] V

- Voltage[90锟斤拷 C]: [0.70...0.67] V

- Voltage[100锟斤拷 C]: [0.54...0.25] V

- Voltage[110锟斤拷 C]: [0.42...0.40] V