With Generic Scan Tool
Evaporative Emission (EVAP) canister purge regulator valve 1, checking
Solenoid valve is closed when no voltage is present.
Recommended special tools and equipment
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram
Test requirements
- The respective fuses of Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- 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
Vehicles with engine code APH
- Disconnect 2-pin connector from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (arrow).
Vehicles with engine code AWP, AWV, BKF, BNU
- Disconnect 2-pin connector from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (arrow).
Continuation for all vehicles
Checking resistance
- Measure resistance between terminals of solenoid valve.
Specified value: 22.0 to 30.0 ohms
If specified value is not obtained:
- Replace Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-.
- 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
Vehicles with engine code APH
- Check wire between test box and 2-pin connector for open circuit according to wiring diagram.
terminal 2 + socket 64
Wire resistance: max. 1.5 ohms
Vehicles with engine code AWP, AWV, BKF, BNU
- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
terminal 2 + socket 64
Wire resistance: max. 1.5 ohms
Continue for all vehicles
- 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-.