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.
2003 Volvo S40FACTORY OEM SERVICE PROCEDURE
Fault-tracing information
Special tools:
See 9988686
Condition
- The fault is permanent.
- The control module is correctly connected.
Possible Source
- Open-circuit in the cable between fuse 5 in the integrated relay/fusebox and control module connector terminal 5.
- Short-circuit to ground or supply voltage in the cable between fuse 5 and control module connector terminal 5.
- Defective switch.
Fault symptom[s]
- The vehicle speed does not decrease when SET- is activated.
- The cruise control does not engage.
- The vehicle speed decreases constantly.
Factory Service Tools
Use the Manual With the Right Hardware
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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.