EVAP Canister Purge Valve 2, Checking
EVAP Canister Purge Valve 2, Checking
Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.
Test requirements
- Fuse S234 OK.
- Fuel Pump (FP) Relay J17 OK.
- The ignition switched off.
NOTE: Voltage for the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115 is supplied by the Fuel Pump (FP) Relay J17.
Test procedure
- Perform a preliminary check to verify the customers complaint. General Diagnosis
Start diagnosis
- Disconnect the exhaust system at the double clamp - arrows -.
- Remove the right rear bracket for the exhaust system.
- Disengage the rear part of the exhaust system on brackets.
NOTE: Exhaust system decoupling element must not be bent more than 10 degrees, otherwise it may be damaged.
- Remove the rear heat shield and bracket for the exhaust system - arrows -.
- Remove the rear nut - arrow - from cover for EVAP canister.
- Fold the cover for EVAP canister down at the rear edge.
- Disconnect the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115 electrical harness connector.
Checking internal resistance
- Using a Multimeter, check the resistance between terminals 1 and 2 of the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115.
Specified value: 22 to 26 Ohms.
If the specified value was not obtained:
- Replace the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115.
If the specification is obtained:
Checking voltage supply
- Using a Multimeter, check the electrical harness connector terminal 1 to Ground (GND) for voltage.
Evaporative Emission (EVAP) Measure to
Canister Purge Solenoid Valve
2 N115 Electrical Harness
connector Terminal
1 Engine Ground (GND)
- Operate the starter briefly.
Specified value: battery voltage.
If the specified value was not obtained:
- Check the wiring connection from the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115 electrical harness connector terminal 1 to the Fuel Pump (FP) Relay J17 terminal 19/86 for an open circuit or a short circuit to Battery positive (+).
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the wiring connection.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
- Install the test box VAG1598/31.
If the manufacturers test box is not being used. Perform the following step.
- Remove the Motronic Engine Control Module (ECM) J220.
- Using a Multimeter, check the Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115 electrical connector terminal 2 to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 45 for resistance.
Evaporative Emission (EVAP) Motronic Engine Control Module (ECM)
Canister Purge Solenoid J220 electrical harness connector
Valve 2 N115 Electrical terminal test box
harness connector terminal socket
2 45
Specified value: 1.5 Ohms.
If the specification was not obtained:
- Check the wiring for a short circuit to Battery positive (+), Ground (GND) or an open circuit.
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the wiring connection.
If the specification was obtained:
- Erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
- Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. Readiness Code
- End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
- Replace the Motronic Engine Control Module (ECM) J220.
- Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code. Readiness Code
End of diagnosis