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 S80 T-6FACTORY OEM SERVICE PROCEDURE
Description of component / functions activation
| Component | Function |
|---|---|
| Injector (1-6) |
Injectors 1-6. The injectors open and close approximately 6 times per second. A clicking noise is heard from the injectors. The engine must be switched off. |
| A/C RELAY | A/C relay. Air conditioning A/C must be requested from the control panel. The air conditioning (A/C) relay and the magnetic clutch for the air conditioning (A/C) compressor click. |
| ENGINE COOLING FAN (FC) pulse width modulation (PWM) controlled 16-93 % | The speed of the engine cooling fan (FC) changes depending on which activation is selected. The fan can be heard. |
| MIL LAMP | Malfunction indicator lamp (MIL). The engine must be running and the lamp off before activation. The lamp lights when the start button is pressed and goes out when the stop button is pressed. |
| LEAK DIAGNOSTIC UNIT, VALVE | Certain markets only. A clicking noise is heard from the valve in the leak diagnostic unit at activation. |
| CANISTER PURGE (CP) VALVE | The EVAP canister purge valve opens and closes 5 times per second. The valve is activated by the start button and stopped using the stop button. The canister purge (CP) valve clicks. |
| COOLING FAN CONTROL MODULE | There is a buzzing noise from the cooling fan for the control modules at activation. |
| THROTTLE UNIT 50-100 % | The shutter in the throttle unit opens. The throttle unit opens to different positions depending on which activation is selected (50, 75 or 100 %) Read off "Throttle Position Sensor (TP) potentiometer 1" or "Throttle Position Sensor (TP) potentiometer 2" at activation to check the function. The engine must be switched off at activation. |
| TURBOCHARGER CONTROL VALVE | There is a clicking noise from the turbocharger (TC) control valve at activation. The engine must be switched off at activation. |
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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