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Checking voltage supply of fuel system pressurisation pump — VW

Checking voltage supply of fuel system pressurisation pump on VW: 14 steps, engines CAYB, CAYC, CBAA, CBAB.

Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.

14 steps 8 engine codes engine codes merged from 3 documented variants

🧭 Before you start

Fits: VW Passat B6 (3C, 2005–2010)

  • Special tools named: VAS 5565
  • Renewed: fuel delivery unit

Don't miss

  • Switch on ignition. The fuel pump must be heard to run for about 2 seconds.
  • The fuel pump is now actuated for 30 seconds.

🔧 Engine codes this applies to

CAYBCAYCCBAACBABCBACCBBBCBDCCLNA

📐 80 workshop diagrams for CAYB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 1
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 2
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 3
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 4
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 5
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 6
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 7
Checking voltage supply of fuel system pressurisation pump — CAYB · diagram 8
+ 72 more diagrams
🔒 80 workshop diagrams for this job Ask about your VW CAYB — free or sign up free to see the drawings

📋 Procedure

  1. Remove bench seat General body repairs, interior72Rear seats; Removing and installing bench seat / individual seats.
  2. Detach carpet under seats and fold it back. General body repairs, interior70Interior trim; Assembly overview - foot support and floor covering
  3. Remove cover from fuel delivery unit .
  4. Switch on ignition. The fuel pump must be heard to run for about 2 seconds.
  5. Switch off ignition.
CAYB? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Pull connector off fuel delivery unit flange.
  2. Connect test instrument adapter/DSO (5-pin)VAS 5565 between connector and flange.
  3. Connect hand-held multimeterV.A.G 1526D to contacts (1) and (5) of adapter.
  4. Connect Vehicle diagnosis tester and perform guided function "“Fuel pump activation (Checking fuel pump)”". [Note: The fuel pump is now actuated for 30 seconds.]
  5. Read voltage value on hand-held multimeterV.A.G 1526D: specification approx. battery voltage.
  6. Check activation of fuel pump relay and wiring for an open or short circuit .
  7. Remove fuel delivery unit .
  8. Check that electrical wiring between flange and fuel pump is connected and has continuity.
  9. Renew fuel delivery unit .
Workshop diagrams

Ask TorqFix about your VW CAYB — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your VW CAYB — free → or sign up free to see the drawings

Other VW procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.