Checking function and voltage supply, vehicles with engine codes CJKA, CJKB — AUDI

🧭 Before you start

Fits: VW Transporter T5 (7H), VW Transporter T5 (7J), VW Transporter T6 (7E), VW Transporter T6 (7F)

• Renewed: fuel delivery unit

Don't miss

• The fuel pump runs very quietly.
• First ensure that wiring connection (1) is secure by pulling the connector without pressing the catch. If connector was not inserted correctly, repeat functional check of fuel pump.

🔧 Engine codes this applies to

📐 19 workshop diagrams for AXA

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

📋 Procedure

1. Connect Vehicle diagnostic tester as follows:
2. Connect diagnosis cable connector to diagnostic connection in driver footwell.
3. Switch ignition on.
4. Press one after the other in the display the buttons for Vehicle self-diagnosis, Engine electronics and Final control diagnosis.
5. Press right arrow button ► on display to final control diagnosis for fuel pump electronics. [Note: The fuel pump runs very quietly.]

6. Switch off ignition.
7. Lower fuel tank until connectors on fuel delivery unit are accessible.
8. First ensure that wiring connection (1) is secure by pulling the connector without pressing the catch. If connector was not inserted correctly, repeat functional check of fuel pump.
9. Pull off connector (1).
10. Check contacts on connector and on fuel delivery unit for damage.
11. Check voltage supply against current flow diagram with multimeterV.A.G 1715.
12. ⚠ The fuel line is under pressure.Risk of injury to eyes and skin from fuel.Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully opening the connection point. — Locate and eliminate open circuit referring to current flow diagram .
13. Remove fuel delivery unit .
14. Check that electrical wires between flange and fuel pump are connected.
15. Fuel pump is defective, renew fuel delivery unit .

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