audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Combination Valve For Secondary Air Injection (AIR), Checking Function and For Proper Seal|Page 5082 > < Combination Valve For Secondary Air Injection (AIR), Checking Function and For Proper Seal|Page 5080
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Connect V.A.G 1527B voltage tester as follows.

Harness connector Terminal

Measure to

1

Engine Ground (GND)

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Operate starter briefly.
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LED must light up.

If LED does not light up:

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Check wire connection from harness connector terminal 1 to Fuel Pump (FP) Relay -J17- via fuse for open circuit according to wiring diagram.
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Specified value: Wire resistance max 1.5 Ohms

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If necessary, repair wire connection.

If LED lights up:

Checking control wire

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Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected.

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Check the following wire connection for open circuit according to wiring diagram.

Harness connector Terminal

Test box Socket

2

44

Specified value: Wire resistance max 1.5 Ohms

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Check the wire for short circuit to B+ and Ground (GND).
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Specified value: Infinite Ohms (no continuity)

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If necessary, repair wire connection.

If no malfunctions are found in wire:

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Replace Engine Control Module (ECM).

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Install lock carrier with attachments.

Combination Valve For Secondary Air Injection (AIR), Checking Function and For Proper Seal|Page 5082 > < Combination Valve For Secondary Air Injection (AIR), Checking Function and For Proper Seal|Page 5080