TT Roadster L4-1.8L Turbo (AWP) (2003)
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Disconnect connector -1- from Intake Air Temperature (IAT) Sensor - G42- -2-.
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Bridge terminals 1 + 2 of connector using the respective adapter cables while observing the indication on display.
If indication jumps to approx. 143 degree C:
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End diagnosis and switch ignition off.
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Replace Intake Air Temperature (IAT) Sensor -G42-.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Audi
Drive Cycle/Readiness Code/With Generic Scan Tool/Readiness Code, Generating
If indication remains at approx. -40 degree C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Continuation of test if indication is approx. 143 degree C:
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Disconnect connector -1- from Intake Air Temperature (IAT) Sensor - G42- -2-.
If indication jumps to approx. -40 degree C:
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End diagnosis and switch ignition off.
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Replace Intake Air Temperature (IAT) Sensor -G42-.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Audi
Drive Cycle/Readiness Code/With Generic Scan Tool/Readiness Code, Generating
If indication remains at approx. 143 degree C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Checking wiring
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
