A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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Harness connector Terminal
Specified value
1 to Ground (GND)
about 5 V
1 to 5
about 5 V
2 to Ground (GND)
about 5 V
2 to 3
about 5 V
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Switch the ignition off.
If the specified values are not obtained:
Checking wiring connections
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Connect the Test Box 105 Pin VAG1598/42 to the wiring harness of the Engine Control Module (ECM) J623. The ECM is not connected.
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Using the Multimeter V.A.G. 1526 A or equivalent, check the following wiring connections for open circuit.
Harness connector Terminal
Test box Socket
1
58
2
80
3
78
4
79
5
56
6
57
Specified value: Wire resistance max 1.5 Ohms.
If the specification is not obtained:
-
Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was OK:
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Replace the Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185.
If no malfunction is detected in the wiring and if the voltage supply was not OK:
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Replace the Engine Control Module (ECM) J623.
Assembly is performed in the reverse order of removal, noting the following:
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Install the left knee bolster.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.
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End diagnosis and switch the ignition off.
