With Generic Scan Tool

Recirculating valve for turbocharger, checking

Valve opens between connection to intake manifold and connection to deceleration shut-off valve with no voltage. Connection to vacuum reservoir is closed.

Test sequence
- Switch ignition off.
- Disconnect connector from Recirculating valve for turbocharger -N249-.







- Measure resistance between terminals of valve.
Specified value: 25...35 ohms

If specified value is not obtained:
- Replace Recirculating valve for turbocharger -N249-:
- Vehicles with engine code APH, item 16
- Vehicles with engine code AWP, AWV, item 16
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If specified values are obtained:
- Connect test box to control module wiring harness, connect test box for wiring test.







- Check wire between test box socket 105+2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check the wire for short circuit to B+ and Ground (GND).

If no malfunctions are found in wire:
- Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).