Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 , checking (AMB Engine Code)

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Multimeter.
Wiring diagram.

Test requirements

Fig 1: Identifying Main Fuse Panel

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The Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 fuse OK.
The ignition switched off.

NOTE:

Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 is supplied via the Engine Component Power Supply Relay J757.

Procedure

Fig 2: Removing Engine Cover

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Remove the engine cover with air filter → 24 MULTIPORT FUEL INJECTION (MFI) .

Fig 3: Identifying Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 Electrical Harness Connector

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Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector - 1 -.

Checking internal resistance

Fig 4: Identifying 2-Pin Electrical Harness Connector

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Using a Multimeter , check the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 terminals 1 and 2 for resistance.

Specified value: 22.0 to 30.0 Ω.

If the specified value is not obtained:

Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80.

If the specification is obtained:

Checking voltage supply

Fig 5: Identifying 2-Pin Electrical Harness Connector & Terminals

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Using a Multimeter , check the electrical harness connector terminal 1 to 2 for voltage.
Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained:

Fig 6: Identifying 2-Pin Electrical Harness Connector & Terminals

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Using a Multimeter , check the electrical harness connector terminal 1 for voltage.

Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector terminal	Measure to
1	Engine Ground (GND)

Operate the starter briefly.

Specified value: battery voltage.

If the specified value is not obtained:

Check the wiring connection from terminal 2 of Fuel Pump Relay J17 to pin 1 of N80 connector for an open circuit.
Check the electrical harness connector for damage, corrosion, lose or broken terminals.
If necessary, repair the wiring connection.

If the specified value was obtained:

Check Ground (GND) activation

Fig 7: Identifying 2-Pin Electrical Harness Connector & Terminals

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Using a Multimeter , check the electrical harness connector for voltage.

Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector terminal	Measure to
2	Battery positive (+)

Operate the starter briefly.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained:

If the manufacturers test box is being used. Perform the following step.

Install the test box. Refer to → 24 MULTIPORT FUEL INJECTION (MFI) .

If the manufacturers test box is not being used. Perform the following step.

Remove the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .

Fig 8: Identifying 2-Pin Electrical Harness Connector & Terminals

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Using a Multimeter , check the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical connector terminal 2 to Motronic Engine Control Module (ECM) J220 electrical connector terminal 64 for an open circuit.

Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector terminal	Motronic Engine Control Module (ECM) J220 electrical connector test box socket
2	64

Specified value: 1.5 Ω max.

If the specification is not obtained:

Check the wiring for a short circuit to Battery positive (+) or an open circuit.
Check the electrical harness connector for damage, corrosion, lose or broken terminals.
If necessary, repair the wiring connection.

If the specification was obtained:

Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .
Install the engine cover with air filter → 24 MULTIPORT FUEL INJECTION (MFI) .

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

Check the DTC memory.
If necessary, erase the DTC memory. Refer to Diagnostic Mode 04: Reset/delete diagnostic data .
If the DTC memory was erased, generate readiness code. Refer to Readiness Code .

End of diagnosis.