Canister Purge Control Valve: Testing and Inspection

Evaporative Emission (EVAP) Canister Purge Regulator Valve, Checking

Solenoid valve is closed when no voltage is present.

Recommended special tools and equipment

- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram

Test requirements







- The respective fuses of Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- must be OK.
- Ignition switched off.

Test sequence







- Disconnect 2-pin connector from Evaporative Emission (EVAP) canister purge regulator valve -N80- (arrow).







- Measure resistance between terminals of solenoid valve. Specified value: 22.0...30.0 Ohms

If specified value is not obtained:
- Replace Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-:
- Vehicles with engine code AEG, AVH, AZG, item 9,
- Vehicles with engine code BDC, item 10.
- 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:
- Connect test box to control module wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test

Vehicles with engine code AEG







- Check wire between test box socket 15+2-pin connector terminal 2 for open circuit according to wiring diagram. Wire resistance: max. 1.5 Ohms

Vehicles with engine code AVH, AZG, BDC







- Check wire between test box socket 64+2-pin connector terminal 2 for open circuit according to wiring diagram. Wire resistance: max. 1.5 Ohms

Continuation for all vehicles

- Also check the wire for short circuit to B+ and Ground (GND). Specified value:
- 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 Motronic Engine Control Module (ECM) -J220-.