A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Connect multimeter at sensor for resistance measurement.
Specified values
Temperature degrees C
Resistance k Ohms
-20
approx. 13.8
0
approx. 5.5
20
approx. 2.4
40
approx. 1.1
60
approx. 0.6
If specified values are not obtained:
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Replace Intake Air Temperature (IAT) sensor.
Checking wire connections
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Connect test box to wiring harness of Engine Control Module (ECM). ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Scan Tool Connecting/Test Box, Connecting For
Wiring and Component Test
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Check the following wire connection for open circuit according to wiring diagram.
Harness connector Terminal
Test box Socket
1
85
2
108
Specified value: Wire resistance max 1.5 Ohms
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Check wires for short circuit to each other as well as to B+ and Ground (GND).
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Specified value: infinite Ohms (no continuity)
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If necessary, repair wire connection.
If no malfunctions are found in wires:
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Replace Mass Air Flow (MAF) sensor -G70-.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence: