Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Audi 5000 CS, AutomaticFACTORY OEM SERVICE PROCEDURE
Differential Pressure Regulator
- Using Adapter (1315 A/1 ), connect multimeter to differential pressure regulator. Set multimeter to 200 mA DC scale. Turn ignition on. Insert fuse in top of fuel pump relay for at least 4 seconds.
- Indicator light should display Code 4341. Multimeter should read 100 mA. Close full throttle switch. Multimeter reading should change to 10 mA.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.