Checking glow plugs Q10/Q14: Audi 2.5 TDI (AXD, AXE, BLJ, BNZ, …)

🧭 Before you start

Fits: VW Transporter T5 (7H), VW Transporter T5 (7J)

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• Any event memory entries must be checked using the Guided fault finding function, and any faults must be rectified accordingly.
• When this test is performed, not all possible faults on the glow plugs can be detected.

🔧 Engine codes this applies to

📐 23 workshop diagrams for AXD

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

📋 Procedure

1. ⚠ Ceramic glow plugs are sensitive to knocks and bending. For this reason a glow plug which has dropped even just from a small height (approx. 2 cm) must not be used anymore. Even if no damage is apparent. It is absolutely necessary to follow the installation instructions, otherwise the heater pin of the glow plug can break and cause engine damage.Transport and store only in original packaging or packed separately in bubble wrap.Only remove ceramic glow plugs from their packaging immediately before installing them.If there is any doubt as to the condition of the ceramic glow plugs, they should be renewed without exception.Damaged ceramic glow plugs (e.g. heater pin of the glow plug is damaged) will invariably cause engine damage.If the heater pin of the glow plug is damaged, the fragments must be removed from the combustion chamber before starting the engine for the first time, otherwise this will invariably cause mechanical damage.Do not oil or grease thread of cylinder head bore or of ceramic glow plugs.It is not permissible to install a combination of ceramic and metallic glow plugs. — Connect .
2. Switch ignition on.
3. Use Guided fault finding function to find any event memory entries concerning glow plugs stored in the engine control unit J623.
4. Any event memory entries must be checked using the Guided fault finding function, and any faults must be rectified accordingly.
5. If there are no event memory entries, the glow plugs are OK. [Note: When this test is performed, not all possible faults on the glow plugs can be detected.]

6. Pull connectors off glow plugs.
7. Connect voltage testerV.A.G 1527B cable to battery positive (+), using clips from auxiliary measuring setV.A.G 1594C.
8. Place test probe of voltage testerV.A.G 1527B on each glow plug one after the other.
9. Connect wire of hand-held multimeterV.A.G 1526 E to the glow plug to be tested using auxiliary clamps from auxiliary measuring setV.A.G 1594C.
10. Fit test probe of hand-held multimeterV.A.G 1526 E to earth connection of glow plug, and check continuity.
11. Repeat the test on all glow plugs one after the other.

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