B14 (Ambient temperature display temperature sensor) : Short circuit to positive (P0073)

P0073
B14 (Ambient temperature display temperature sensor) : Short circuit to positive (P0073)
Possible cause:
­ B14 (Ambient temperature display temperature sensor)
Affected functions:
­
Engine output
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Test 1: Ambient temperature
Test 2: Check component B14 (Ambient temperature display temperature sensor).
1. Ambient temperature
Preconditions for test Ambient temperature
Test prerequisite
10.52SS
Page 8312010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 832
­ Air filter and associated hoses are correctly fitted.
Test sequence
­ Drive vehicle with constant engine load at a speed of > 50 km/h (> 31 mph) for approx. 5 min.
Status of the relevant actual values:
­ Ambient temperature:Warning! Communication with ECU required.
­ Intake air temperature:Warning! Communication with ECU required.
Question
­
Is the temperature difference between component B14 (Ambient temperature display temperature sensor) and component B17
(Intake air temperature sensor) greater than 40? C?
YES
Test 1.1: Check component B14 (Ambient temperature display temperature sensor).
Test 1.2: Check component B17 (Intake air temperature sensor).
1.1. Check component B14 (Ambient temperature display temperature sensor).
Test prerequisite
­ Relevant fault codes exist or a complaint has been received.
Test sequence
­ Detach coupling at component B14 (Ambient temperature display temperature sensor).
­ Measure resistance with multimeter between pins (B14)1 and (B14) 2
Status of the relevant actual values:Specified value
­ Temperature0? C:Resistor= [8.0...12.0] kohms
­ Temperature10? C:Resistor= [4.5...7.0] kohms
­ Temperature20? C:Resistor= [3.0...4.5] kohms
­ Temperature30? C:Resistor= [2.0...3.0] kohms
­ Temperature40? C:Resistor= [1.3...2.0] kohms
Question:Are the measurement values OK?
YES
The measurement values are OK.Possible cause and remedy
­ Test wiring (N10/10) 3.3 ­ (B14) 2 for Short circuit or open circuit
­ Test wiring (N10/10) 3.14 ­ (B14) 1 for Open circuit
­ Component N10/10 (Driver­side SAM control module) is defective.
End of test2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 833
NO
The measurement values are not OK.Possible cause and remedy
­ Component B14 (Ambient temperature display temperature sensor) is defective.
End of test
1.2. Check component B17 (Intake air temperature sensor).
Test 1.2.1: Check component B17 (Intake air temperature sensor) using actual value.
Test 1.2.2: Check plausibility of actual value B17 (Intake air temperature sensor) in control module ME 9.7 (AMG).
Test 1.2.3: Check internal resistance of component B17 (Intake air temperature sensor).
1.2.1. Check component B17 (Intake air temperature sensor) using actual value.
Test sequence
­ Switch on ignition.
Status of relevant actual value:
­ Intake air temperature:Warning! Communication with ECU required.
Specified value
­ Current temperature in area surrounding component B17 (Intake air temperature sensor)
Question
­
Is the actual value o.k.?
YES
The actual value is okay.End of test
NO
The actual value is not o.k.Possible cause and remedy
­
­
Check plausibility of actual value B17 (Intake air temperature sensor) in control module N3/10 (ME­SFI [ME] control unit).
Check internal resistance of component B17 (Intake air temperature sensor).2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 834
1.2.2. Check plausibility of actual value B17 (Intake air temperature sensor) in control module ME 9.7 (AMG).
Test prerequisite
­ The actual value is not o.k.
Test sequence
­ Detach coupling at component B17 (Intake air temperature sensor).
­ Switch on ignition.
Status of relevant actual value:
­ Intake air temperature:Warning! Communication with ECU required.
Specified value
­
­
If the connector is unplugged at component B17 (Intake air temperature sensor), value [ ­40? C ] is displayed.
Bridge pin 1 in pin 2 at the unplugged connection of component B17 (Intake air temperature sensor).The value is approx. [ 150? C ]
for a short period of time and drops back down to the substitute value of approx. [ ­40? C ].
Question
­
Is the actual value o.k.?
YES
The actual value is okay.Further possible causes of fault
­
Check internal resistance of component B17 (Intake air temperature sensor).
NO
The actual value is not o.k.Possible cause and remedy
­ Signal wire
End of test
1.2.3. Check internal resistance of component B17 (Intake air temperature sensor).
Test sequence
­ Switch off ignition.
­ Detach coupling at component B17 (Intake air temperature sensor).
­ Measure resistance with multimeter between pins (B17) 1 and (B17) 2
Specified value
­ Resistor(20? C): [2350...2500]ohms
­ Resistor(30? C): [1600...1700]ohms
­ Resistor(40? C): [1100...1200]ohms
­ Resistor(50? C): [800...900]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
­ B17 (Intake air temperature sensor)
End of test
NO
Ambient temperature
The temperature difference is not greater than 40 ?C.End of test
2. Check component B14 (Ambient temperature display temperature sensor).2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
Test 2.1: Check component B14 (Ambient temperature display temperature sensor).
2.1. Check component B14 (Ambient temperature display temperature sensor).
Test prerequisite
­ Relevant fault codes exist or a complaint has been received.
Test sequence
­ Detach coupling at component B14 (Ambient temperature display temperature sensor).
­ Measure resistance with multimeter between pins (B14)1 and (B14) 2
Status of the relevant actual values:Specified value
­ Temperature0? C:Resistor= [8.0...12.0] kohms
­ Temperature10? C:Resistor= [4.5...7.0] kohms
­ Temperature20? C:Resistor= [3.0...4.5] kohms
­ Temperature30? C:Resistor= [2.0...3.0] kohms
­ Temperature40? C:Resistor= [1.3...2.0] kohms
Question:Are the measurement values OK?
YES
The measurement values are OK.Possible cause and remedy
­ Test wiring (N10/10) 3.3 ­ (B14) 2 for Short circuit or open circuit
­ Test wiring (N10/10) 3.14 ­ (B14) 1 for Open circuit
­ Component N10/10 (Driver­side SAM control module) is defective.
End of test
NO
The measurement values are not OK.Possible cause and remedy
­ Component B14 (Ambient temperature display temperature sensor) is defective.
End of test