Checking output wiring

Fig 1: Identifying 3-Pin Connector Terminals 1 & 3

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect voltage tester V.A.G 1527 B as follows:

Harness connector Terminal	Measure to
- 2 -	Battery positive (B+)

Initiate output Diagnostic Test Mode (DTM) Check activation .

Fig 2: Display On VAS 5051 - (1st Control Element In Test & Evaporative Emission (EVAP) Canister Purge Regulator Valve-N80-)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Display on VAS 5051 :

A - Output diagnostic test mode waiting, Advancing by switching required

1 - Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

Press → button repeatedly until leak detection pump for fuel system is activated

LED must blink.

If LED does not blink:

End function "03 - output Diagnostic Test Mode (DTM)" by pressing ← button.
From selection, click on the diagnostic function "06 - End output".
Switch off ignition.

Fig 3: Connecting Test Box V.A.G 1598/31 To Wiring Harness Connectors, With Engine Control Module (ECM) Not Connected

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect test box V.A.G 1598/31 to wiring harness connectors, with Engine Control Module (ECM) not connected. Connect Ground (GND) clip at test box to Ground (GND) (not visible in illustration) →
- 24 MULTIPORT FUEL INJECTION (MFI) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION & IGNITION, ENGINE CODE(S): AMB
- 24 - MULTIPORT FUEL INJECTION (MFI) for 2.0 LITER 4-CYL. 4V TURBO FUEL INJECTION IGNITION, ENGINE CODE(S): BPG, BWT
- 24 MULTIPORT FUEL INJECTION (MFI) for 3.0 LITER 6-CYL. 5V FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN
- 24 - FUEL INJECTION SYSTEM for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH
- 24 - MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 4V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BNS
- 24 MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 5V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BHF
.

CAUTION: To avoid damaging electronic components, switch to the corresponding measuring range and observe all test conditions before connecting the test leads.

Fig 4: Identifying 3-Pin Connector Terminals 1 & 3

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:

Harness connector Terminal	Test box V.A.G 1598/31 Socket
- 2 -	25

Repair wiring open circuit or short circuit according to wiring diagram.

If no malfunction is found, but leak diagnosis pump is not functional during output diagnostic test mode:

Replace Leak Detection Pump (LDP) V144 → Leak Detection Pump (LDP) V144 , removing and installing .
Observe procedures for after re-connecting engine control module (ECM) →
- 24 MULTIPORT FUEL INJECTION (MFI) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION & IGNITION, ENGINE CODE(S): AMB
- 24 - MULTIPORT FUEL INJECTION (MFI) for 2.0 LITER 4-CYL. 4V TURBO FUEL INJECTION IGNITION, ENGINE CODE(S): BPG, BWT
- 24 MULTIPORT FUEL INJECTION (MFI) for 3.0 LITER 6-CYL. 5V FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN
- 24 - FUEL INJECTION SYSTEM for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH
- 24 - MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 4V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BNS
- 24 MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 5V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BHF
.