B17 (Intake air temperature sensor) : Short circuit to ground (P0112)

P0112
B17 (Intake air temperature sensor) : Short circuit to ground (P0112)
Possible cause:
­ B17 (Intake air temperature sensor)
Affected functions:
­
Engine diagnosis
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Test 1: Check component B17 (Intake air temperature sensor).
1. Check component B17 (Intake air temperature sensor).
Test 1.1: Check component B17 (Intake air temperature sensor) using actual value.
Test 1.2: Check plausibility of actual value B17 (Intake air temperature sensor) in control module ME 9.7 (AMG).
Test 1.3: Check internal resistance of component B17 (Intake air temperature sensor).
1.1. 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).
1.2. Check plausibility of actual value B17 (Intake air temperature sensor) in control module ME 9.7 (AMG).
Test prerequisite2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 378
­ 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
1.3. 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