With Generic Scan Tool

Recirculating Valve For Turbocharger -N249-, Checking

Checking internal resistance
- Disconnect connector at valve.







- Connect multimeter at valve for resistance measurement.
Specified value: 27 ... 30 Ohm

If specified value is not obtained:
- Replace Recirculating valve for turbocharger -N249-.

If specified value is obtained:
- Check voltage supply

Checking voltage supply

NOTE: Voltage is supplied to the recirculation valve via the Fuel Pump (FP) relay.

Test requirement:
- Fuse for recirculation valve OK

- Disconnect connector at valve.
- Connect voltage tester as follows:

Harness connector Measure to
Terminal
1 Engine Ground (GND)

- Operate starter briefly.
LED must light up.

If LED does not light up:
- Check wire connection from terminal 1 to Fuel Pump (FP) relay via fuse for open circuit.
- Repair open circuit if necessary.

If wire connection is OK:
- Check Fuel Pump (FP) relay.

If LED lights up:







- Connect test box to control module wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test







- Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:

Harness connector VAG1598/31 test box
Terminal socket
2 9

- Repair open circuit or short circuit if necessary.

If wire connection is OK:
- Replace Engine Control Module (ECM).