Air Control Valve For Fuel Injectors, Electrical Testing

- Disconnect harness connector from air control valve for fuel injectors -N212-.





- Connect multimeter US 1119 (Fluke 83 or equivalent) and check resistance across valve terminals.
Specified value: 15-35 ohms

If resistance is not OK:
- Replace air control valve for fuel injectors -N212-.
- Check readiness code See page 01-47. If DTC memory has been erased, generate new readiness code. Testing and Inspection

Checking voltage supply
- Fuse for air control valve for fuel injectors -N212- OK (E-box in plenum)
- Disconnect harness connector from air control valve for fuel injectors -N212-.





- Connect VAG 1527 LED voltage tester between connector terminal 1 and Ground.
- Switch ignition on.
LED must light up

If LED does not light:
- Check wiring for open circuit between connector terminal 1, fuse for air control valve for fuel injectors -N212- (E-box in plenum), and Motronic ECM power supply relay.
See Electrical Wiring Diagrams, Troubleshooting and Component Locations.

If wiring is OK:
- Check Motronic ECM power supply relay.

Checking actuation
- Connect VAG 1527 LED voltage tester between harness connector terminals 1 (B+) and 2 (harness connector for air control valve remains connected).
- Start engine.
LED must light up.

NOTES:
- When engine is cold, the LED will light up at idle.
- When engine is at normal operating temperature, LED lights up only above approx. 1500 RPM.

If LED does not light up:
- Connect VAG 1598/19 test box to ECM harness connector.





- Check wiring between air control valve connector terminal 2 and ECM/test box socket D4.
See Electrical Wiring Diagrams, Troubleshooting and Component Locations.
- Check air hoses and lines (for air-shrouded fuel injectors) for leaks and blockage.

If air control valve, wiring, air hoses and lines are OK:
- Replace ECM and generate new readiness code. Testing and Inspection