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Checking output wiring Audi S4 B7

Fuel Supply System 1 illustration ~412 words

Checking output wiring

  1. Connect voltage tester V.A.G 1527 B as follows
Harness connector TerminalMeasure to
2Battery positive (B+)
  1. Initiate output Diagnostic Test Mode (DTM) «Check activation»(/audi/s4/b7-2004-2008/remont/fuel-system/#fuel-supply-system__check-activation) .

Display on VAS 5051

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

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

  1. Press --> button repeatedly until leak detection pump for fuel system is activated
  1. LED must blink.

If LED does not blink

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

Scheme 187

Scheme 187
Scheme 187
  1. 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)»(ref-278889-S34101423592008020700000) 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»(ref-278893-S37153426882008020700000) for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH «24 - MULTIPORT FUEL INJECTION (MFI)»(ref-278897-S07807171762008020700000) for 4.2 LITER V8 4V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BNS «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/s4/b7-2004-2008/remont/cooling-fan/#42l-v8-5v-fuel-injection-and-ignition-engine-codes-bhf) for 4.2 LITER V8 5V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BHF .
CAUTIONTo avoid damaging electronic components, switch to the corresponding measuring range and observe all test conditions before connecting the test leads.
  1. Check the following wire connection for open circuit and short circuit to Ground (GND) and B+
Harness connector TerminalTest box V.A.G 1598/31 Socket
225
  1. 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

  1. Replace Leak Detection Pump (LDP) V144 --> «Leak Detection Pump (LDP) V144 , removing and installing»(/audi/s4/b7-2004-2008/remont/fuel-system/#fuel-supply-system__leak-detection-pump-ldp-v144) .
  2. 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)»(ref-278889-S34101423592008020700000) 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»(ref-278893-S37153426882008020700000) for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH «24 - MULTIPORT FUEL INJECTION (MFI)»(ref-278897-S07807171762008020700000) for 4.2 LITER V8 4V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BNS «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/s4/b7-2004-2008/remont/cooling-fan/#42l-v8-5v-fuel-injection-and-ignition-engine-codes-bhf) for 4.2 LITER V8 5V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BHF .