A3 L4-2.0L Turbo (BPY) (2006)
Check activation of Fuel Pump (FP) Control Module J538
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For voltage testing, connect multimeter with measuring probes and connector adapters from connector test set V.A.G 1594C between clamp - 2 -
and - 6 - , as shown in the illustration. The electrical connection remains connected.
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Start engine.
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Specified value at start and in idle: approx. 6.0 V.
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Depress accelerator pedal completely and then release it (brief throttle burst).
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Specified value: Voltage value must first increase, then decrease and finally increase again to the value read out previously.
If reading does not result as described:
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Connect Test Box V.A.G 1598/42 to 94-pin wiring harness connector with adapter cable V.A.G 1598/39-2 ; engine control module (ECM) will
remain disconnected.
CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test
requirements.
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Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:
Harness connector Terminal
V.A.G 1598/42 Bushing
- 2
- 27
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Repair wiring open circuit or short circuit according to wiring diagram.
If no malfunctions are detected:
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Replace Fuel Pump (FP) Control Module J538.