Checking engine speed sender: VW Passat B5 2.3 (AZX)

🧭 Before you start

Fits: VW Passat B5 (3B)

• Special tools named: V.A.G 1598/31
• Renewed: engine control unit

Don't miss

• There is a larger gap on the sender wheel. This gap is the reference mark and does not mean that the sender wheel is damaged.

🔧 Engine codes this applies to

📋 Procedure

1. Separate grey 3-pin connector (3) to engine speed sender.
2. Measure resistance of sender between contacts 2 + 3 at sender connector.
3. Check the sender for short-circuit between contacts 1 + 2 as well as 1 + 3.
4. Renew engine speed sender G28.
5. Read fault memory, if necessary, repair any faults and then clear fault memory , Reading and clearing fault memory.

6. Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
7. Check lines between test box and 3-pin connector for open circuit referring to current flow diagram.
8. Additionally check wires for short to one another.
9. Remove sender and check sender wheel for secure seating, damage and true running. [Note: There is a larger gap on the sender wheel. This gap is the reference mark and does not mean that the sender wheel is damaged.]
10. Renew engine control unit .

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