B11/4 (Coolant temperature sensor) : Short circuit to positive or open circuit (P0118)

P0118
B11/4 (Coolant temperature sensor) : Short circuit to positive or 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
10.52SS
Page 3942010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 395
­ Voltage[20?C]: [3.45...3.32] V
­ Voltage[30?C]: ..[2.93...2.82] V
­ Voltage[40?C]: [2.41...2.32] V
­ Voltage[50?C]: [1.93...1.86] V
­ Voltage[60?C]: [1.51...1.46] V
­ Voltage[70?C]: [1.18...1.13] V
­ Voltage[80?C]: [0.90...0.87] V
­ Voltage[90?C]: [0.70...0.67] V
­ Voltage[100?C]: [0.54...0.25] V
­ Voltage[110?C]: [0.42...0.40] V
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
­ Line from component B11/4 (Coolant temperature sensor) to component N3/10 (ME­SFI [ME] control unit)
­ B11/4 (Coolant temperature sensor)
End of test
1.2. Check signal lines on component B11/4 (Coolant temperature sensor).
Test sequence
­ Switch on ignition.
Status of relevant actual value:
­ Coolant temperature sensor ( Signal voltage ):Warning! Communication with ECU required.
Specified value
­ If the connection is unplugged at component B11/4 (Coolant temperature sensor), the value is approx. 5 V.
­ Bridge pin 1 in pin 2 at the unplugged connection of component B11/4 (Coolant temperature sensor).The value is< 0.5 V.
Question
­
Is the actual value o.k.?
YES
The actual value is okay.Further possible causes of fault
­
Check internal resistance of component B11/4 (Coolant temperature sensor).
NO
The actual value is not o.k.Possible cause and remedy
­ Check lines from component B11/4 (Coolant temperature sensor) to component N3/10 (ME­SFI [ME] control unit).
End of test
1.3. Check internal resistance of component B11/4 (Coolant temperature sensor).
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? C): [3030...3130]ohms
Resistor(30? C]: [1950...2050]ohms2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
­ Resistor(40? C): [1275...1375]ohms
­ Resistor(50? C): [850...950]ohms
­ Resistor(60? C): [600...650]ohms
­ Resistor(70? C): [420...460]ohms
­ Resistor(80? C): [305...335]ohms
­ Resistor(90? C): [220...240]ohms
­ Resistor(100? C): [160...180]ohms
­ Resistor(110? 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