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.
1990 Volkswagen Cabriolet Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Main Fuel Pump Volume Check: CORRADO
- Disconnect wire harness connector from the fuel pump. See Figure . With voltmeter attached to terminals, activate fuel pump by removing fuel pump relay and applying battery voltage to terminals No. 4 of the fuse box connection for the fuel pump relay. Fuel pump relay located on fuse box housing. Terminal numbers are molded into fuse box plastic housing.
- Record voltage. Remove fuel line from outlet side of accumulator. See Figure . Attach a piece of hose between return line and a graduated container. Activate fuel pump for 30 seconds. Compare volume with specifications given in MAIN FUEL PUMP VOLUME (AFC-Digifant II) table.
Factory Service Tools
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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.
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