Activating Secondary Air Injection (AIR) solenoid valve N112

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Volkswagen Jetta, 2002 Volkswagen GTI, 2001 Volkswagen Jetta, 2001 Volkswagen GTI, and 2000 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Press → button.

Indicated on display

Output Diagnostic Test Mode ->
Secondary air injection valve N112

The secondary air injection valve must run until the next component is activated by pressing the → button.

If the relay does not click:

Fig 1: Secondary Air Injection Solenoid Valve N112

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Disconnect 2-pin harness connector from Secondary Air Injection (AIR) solenoid valve N112 - arrow -

Fig 2: Checking 2-Pin Connector Of Secondary Air Injection Solenoid Valve Voltage

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Connect Voltage tester VAG 1527B using adapter cables from VW 1594 to disconnected harness connector. LED must flash (bright/darker).

If LED flashes:

Proceed with output DTM until completed.
Switch ignition off.
Replace Secondary Air Injection (AIR) solenoid valve N112. → 26 - EXHAUST SYSTEM, EMISSION CONTROLS
Check DTC memory. If necessary, repair any malfunctions and erase DTC memory → Diagnostic Trouble Code (DTC) memory, checking and erasing (scan tool functions 02 and 05) .

Display readiness code → Readiness code (function 15), displaying .

If DTC memory has been erased, the readiness code must be generated again → Readiness code (function 15), generating .

LED does not flash:

Proceed with output DTM until completed.
Switch ignition off.
Remove wiper arms and plenum chamber cover. → 92 WINDSHIELD WIPER & WASHER SYSTEM

Fig 3: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

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Connect Test box VAG 1598/31 to control module wiring harness. Engine control module is not connected by this action.

Fig 4: 2-Pin Electrical Harness Connector & Terminals

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Check wire for open circuit between test box socket 44 and 2-pin harness connector terminal - 2 - using wiring diagram. Wire resistance: max. 1.5 Ω
Additionally check wire for short to battery positive (B+) and Ground (GND). Specified value: ∞ Ω~
Check wire between 2-pin connector terminal - 1 - and Fuel Pump (FP) relay J17 for open circuit using wiring diagram. Wire resistance: max. 1.5 Ω

If no wiring malfunction is detected:

Replace Motronic ECM J220 → Engine Control Module (ECM), replacing .