S4 V8-4.2L (BHF) (2004)
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Connect test box V.A.G 1598/31 to wiring harness connectors, Engine Control Module (ECM) is not connected. Connect Ground (GND) clip at
test box to Ground (not visible in illustration). See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring and Component Test
CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test requirements.
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Check following wiring connection for open circuit and short circuit to Ground (GND) and B+:
3-socket relay carrier in
Test box V.A.G 1598/31
electronics box, plenum,
chamber position 2terminal
-6 -
46
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Repair wiring connection if necessary.
If no malfunctions are detected:
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Replace Secondary Air Injection (AIR) Pump Relay -J299-.
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Remove quick-release screws - 1 -, remove screws - 2 - and remove sound insulation.