Checking exhaust gas temperature sender: Audi A4 B5 2.7 (ASJ, AZR)

🧭 Before you start

Fits: Audi A4 B5 (8D)

Don't miss

• Disregard (arrows).
• Connect adapter cableV.A.G 1598/31 (test box) to connectors of wiring harness; do not connect engine control unit. Connect earth clip of test box to earth (not shown in illustration).

🔧 Engine codes this applies to

📋 Procedure

1. Switch off ignition.
2. Unfasten screw connections (top left arrows) and detach engine cover panel (A).
3. Unplug electrical connector on control unit of relevant exhaust gas temperature sender. [Note: Disregard (arrows).] [Note: The voltage supply for the exhaust gas temperature sender is taken from fuel pump relay J17]
4. Connect voltage testerV.A.G 1527 B between contact (3) of electrical connector for exhaust gas temperature sender 1G235 or exhaust gas temperature sender 1, bank 2G236 and engine earth.
5. Operate the starter briefly.

6. Refer to current flow diagram to check for open circuit in wiring from contact (3) of connector via fuse to fuel pump relay J17.
7. Repair wiring connection if necessary.
8. Connect adapter cableV.A.G 1598/31 (test box) to connectors of wiring harness; do not connect engine control unit. Connect earth clip of test box to earth (not shown in illustration).
9. ⚠ To prevent damage to electronic components, select appropriate measuring range before connecting measuring leads and observe test requirements. — Check for open circuit and short to positive or earth in the following wiring:
10. Repair wiring connection if necessary.
11. Renew exhaust gas temperature sender: left-side , right-side .

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