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.

2004 Volvo V40 BaseFACTORY OEM SERVICE PROCEDURE

Checking the control module connection: Verification

HINT: After carrying out the repair, check that the fault has been remedied as follows:

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Reinstall the connectors, components etc.
Ignition on.
The ABS warning lamp must light when the ignition is switched to position II. It should go out after 4 seconds, or when the engine is started.

HINT: The ABS warning lamp does not go out if the control module has registered a fault.

Fig 2: Checking Freewheel Function (Poly V-Belt Removed)
Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the lamp go out approximately 4 seconds after the ignition is switched on?

YES
VERIFIED: Troubleshooting has been completed.
NO
Refer to Information

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.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.