Wastegate Bypass Regulator Valve, Checking

Wastegate Bypass Regulator Valve, Checking

Recommended special tools and equipment
- VA.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram

Test requirements







- The respective fuses of Wastegate Bypass Regulator Valve -N75- must be OK.
- Fuel Pump (FP) Relay -J17- must be OK, check.
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.

Test sequence







- Disconnect connector -2- at Wastegate Bypass Regulator Valve -N75- (-1-).

Checking resistance







- Check resistance between valve terminals.

Specified value: 25.0 to 35.0 Ohms

If specified value is not obtained:
- Replace Wastegate Bypass Regulator Valve -N75-.
- 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 value is obtained:
- Check wires to control module according to wiring diagram.

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







- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Terminal 2 + socket 104

Wire resistance: max. 1.5 Ohms

- Check the wire for short circuit to B+ and Ground (GND).

Specified value: Infinite Ohms

- 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

- 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 no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.