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Check activation Audi A6 C6 рестайлинг

Fuel Supply System 3 illustrations ~316 words

Check activation

Display on VAS 5051

  1. Tap "On Board Diagnostic" in selection - 1 - and activate by tapping --> button.

Display on VAS 5051

  1. Tap "01 - Engine Electronics" vehicle system in selection - 1 - and activate by tapping --> button.

Display on VAS 5051

  1. Tap "005 - Output Diagnostic Test Mode (DTM)" function in selection - 1 - and activate by pressing --> button.

Scheme 88

Scheme 88
Scheme 88

Display on VAS 5051

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

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

  1. Press --> button repeatedly, until Leak Detection Pump (LDP) V144 is activated.

Note. Operating noise of Leak Detection Pump (LDP) is audible at left rear wheel housing.

  1. End function "005 - output Diagnostic Test Mode (DTM)" by pressing <-- button.
  2. Select "022 - End output" function in selection.
  3. Switch off ignition.

If Leak Detection Pump (LDP) for fuel system is not activated (no operating noise audible)

  1. Remove leak detection pump (LDP) V144 --> «Leak Detection Pump (LDP) V144 , removing and installing»(/audi/a6/c6-2008-2011/remont/fuel-system/#fuel-supply-system__leak-detection-pump-ldp-v144) and disconnect the electrical connection.

Scheme 89

Scheme 89: Checking internal resistance
Scheme 89: Checking internal resistance
  1. Connect hand multimeter V.A.G 1526C for resistance measurement as follows.
Leak detection pump (LDP) TerminalSpecified value
1 - + - 3640 to 720 ohms
2 - + - 315 to 17 ohms

If specifications are not obtained

  1. Replace Leak Detection Pump (LDP) V144 --> «Leak Detection Pump (LDP) V144 , removing and installing»(/audi/a6/c6-2008-2011/remont/fuel-system/#fuel-supply-system__leak-detection-pump-ldp-v144) .

If specified values are achieved

  1. Check voltage supply of leak detection pump «Checking voltage supply»(/audi/a6/c6-2008-2011/remont/fuel-system/#fuel-supply-system__checking-voltage-supply) .

Scheme 90

Scheme 90: Checking voltage supply
Scheme 90: Checking voltage supply

Note. Voltage for leak detection pump is supplied via Motronic Engine Control Module (ECM) Power Supply Relay J271. Fuse for leak detection pump OK

  1. Connect voltage tester V.A.G 1527B as follows
Harness connector TerminalMeasure to
3Engine Ground (GND)
  1. Briefly operate starter.
  1. LED must light up.

If LED does not light up

  1. Check electrical harness connection from terminal - 3 - via fuse to Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram.
  2. Repair open circuit in wiring according to wiring diagram.