TT Coupe L4-1.8L Turbo (AWP) (2005)
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Check wiring harness from terminal 2 to Fuel Pump (FP) Relay -J17- according to wiring diagram.
If voltage supply and wiring are OK:
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Switch ignition on.
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Connect multimeter to terminal 4 of connector and engine Ground (GND) for voltage measurement:
Specification: 4.5 to 5.5 V
If no voltage is present:
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Switch off ignition.
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Check signal and Ground (GND) wires.
Signal and Ground Wires of Mass Air Flow Sensor, Checking
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Connect test box to control module wiring harness. See: Testing and Inspection/Component Tests and General Diagnostics/Test Box, Connecting
For Wiring Test
The Engine Control Module (ECM) remains disconnected.
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
Terminal 5 + Socket 29
Terminal 4 + Socket 53
Terminal 3 + Socket 27
Wiring resistance: max. 1.5 Ohms
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specification: Infinity Ohms
If no fault is detected in the wiring:
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Replace Mass Air Flow (MAF) Sensor G70.
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Erase DTC memory of ECM. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Generate Readiness Code