Checking low-pressure fuel system: VW Jetta VI / Golf V / Jetta 2.0 TDI (CFFB, CFHB, CFHC, CLCA, …)

🧭 Before you start

Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5

• Special tools named: V.A.G 1318

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• The K-Jetronic pressure testerV.A.G 1318 must be inserted as an intermediate element into the fuel supply line.
• Check fuel system for leaks.

🔧 Engine codes this applies to

📐 44 workshop diagrams for CFFB

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

📋 Procedure

1. Remove engine cover panel .
2. ⚠ Always read rules for cleanliness and instructions for working on fuel system .Always follow these rules for cleanliness and instructions before starting work and while working on the fuel system.Wrap a clean cloth around the connection before opening the fuel system, then carefully loosen the connection to release the pressure. — Remove fuel supply line (arrow) from high-pressure pump; release hose clip for this.
3. Connect K-Jetronic pressure testerV.A.G 1318 with corresponding adapter (2) to fuel supply line (1).
4. Connect second hose (3) to V.A.G 1318 at open connection of high-pressure pump as shown in following illustration. [Note: The K-Jetronic pressure testerV.A.G 1318 must be inserted as an intermediate element into the fuel supply line.]
5. Connect vehicle diagnosis tester.

6. Switch on ignition.
7. Select "“Engine electronics”" in the self-diagnosis program.
8. Then select "“Basic setting”".
9. Select "“Testing fuel pre-supply pump”" from selection list.
10. Run fuel pumps until highest fuel pressure has built up.
11. Check delivery rate of fuel pump . [Note: Check fuel system for leaks.]

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