Activating Secondary Air Injection (AIR) solenoid valve N112

• 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:

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

• 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

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

• 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  .