Checking voltage supply of secondary air pump relay J299. — AUDI

🔧 Engine codes this applies to

📐 14 workshop diagrams for AHL

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

📋 Procedure

1. Detach plenum chamber cover (right-side) (2). [Note: Ignore items marked (1) and (3).]
2. Unscrew bolts (arrows) and pull out engine control unit towards front.
3. Turn air quality sensor G238(Item 1) 90° anti-clockwise and detach it from bracket.
4. Release retaining clips (arrows).
5. Open electronics box (plenum chamber) cover slightly and pull off to front.

6. Disconnect secondary air pump relay J299(Item 1).
7. Connect multimeter (voltage measurement range) as follows:
8. Carry out the following checks:
9. If necessary repair wiring connection.
10. Connect multimeter (voltage measurement range) as follows:
11. Operate the starter briefly.
12. Switch off ignition.
13. Carry out the following checks:
14. If necessary repair wiring connection.

Other AUDI procedures

• Testing intake manifold change-over function
• Testing intake air temperature sender (vehicles with intake manifold change-over function)
• Testing coolant temperature sender (version with square connector)
• Testing knock sensor
• Removing and installing sealing flanges and flywheel/drive plate
• Removing and installing toothed belt · 56 torque figures
• Removing engine · 41 torque figures
• Removing camshaft timing chain from camshafts · 38 torque figures
• Installing engine · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures