Checking injectors for leaks, engine codes BSE, BSF, CCSA, CMXA — VW

🧭 Before you start

Fits: VW Golf V / Jetta (1K, 2003–2009), VW Golf VI (5K, 2008–2013); platform codes 5M1, 521

• Special tools named: VAS 5565
• Renewed: leaking injector, seals

Don't miss

• This step serves only to have the fuel pump running when the engine is stopped.
• Operate remove controlV.A.G 1348/3A and check injectors for leaks (visual check). No more than 1 to 2 drops per minute must escape from each valve when fuel pump is running.
• After replacing components of injection system, erase learnt values in engine control unit vehicle diagnostic tester "“Guided functions”".Always renew seals.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Fuel supply line is pressurised. Wear eye protection and protective clothing to avoid possible injury and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection. — Remove lower part of intake manifold .
2. Pull connectors off injectors.
3. Pull fuel rail with injectors off intake manifold and lay on a clean cloth.
4. Remove seat bench (Golf Plus: rear right seat) General body repairs, interior72Rear seats; Removing and installing seat bench.
5. Remove cover from fuel delivery unit.

6. First check that the connector (arrow) is fitted securely by pulling the connector without pressing the catch. The connector can cause a fault if it has not been fitted correctly.
7. Now pull off connector.
8. Check the contacts on the connector and on the fuel delivery unit for damage.
9. Connect test instrument adapter/DSO (5-pin)VAS 5565 to connector and fuel delivery unit.
10. Connect remote control for V.A.G 1348V.A.G 1348/3A to test instrument adapter/DSO (5-pin)VAS 5565 and to battery positive (+). [Note: This step serves only to have the fuel pump running when the engine is stopped.]
11. Operate remove controlV.A.G 1348/3A and check injectors for leaks (visual check). No more than 1 to 2 drops per minute must escape from each valve when fuel pump is running.
12. Renew leaking injector . [Note: After replacing components of injection system, erase learnt values in engine control unit vehicle diagnostic tester "“Guided functions”".Always renew seals.]

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