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.
2000 Volvo V40FACTORY OEM SERVICE PROCEDURE
Electronic Climate Control (ECC) DTCS
ELECTRONIC CLIMATE CONTROL (ECC) - DTC INDEX
| DTC | Description |
|---|---|
| ECC-121 | Open-Circuit Or Short-Circuit To Ground (2000) |
| ECC-122 | Outside temperature sensor. Short-circuit to reference voltage |
| ECC-123 | Passenger compartment temperature sensor. Open-circuit or short-circuit to ground |
| ECC-124 | Passenger compartment temperature sensor. Short-circuit to supply voltage |
| ECC-135 | Coolant temperature sensor. Open-circuit or short-circuit to ground |
| ECC-136 | Coolant temperature sensor. Short-circuit to reference voltage |
| ECC-137 | Evaporator sensor. Open-circuit or short-circuit to ground |
| ECC-138 | Evaporator sensor. Short-circuit to reference voltage |
| ECC-139 | Generator (GEN) D+. Signal missing |
| ECC-140 | Speedometer. Signal too high |
| ECC-211 | Position sensor, temperature damper motor. Short-circuit to ground |
| ECC-212 | Position sensor, temperature damper motor. Open-circuit or short-circuit to supply voltage |
| ECC-221 | Position sensor, air distribution damper motor. Short-circuit to ground |
| ECC-222 | Position sensor, air distribution damper motor. Open-circuit or short-circuit to supply voltage |
| ECC-311 | Temperature damper motor. Short-circuit to ground or supply voltage |
| ECC-312 | Temperature damper motor. Open-circuit or active too long |
| ECC-321 | Air distribution damper motor. Short-circuit to ground or supply voltage |
| ECC-322 | Air distribution damper motor. Open-circuit or active too long |
| ECC-323 | Recirculation damper motor. Short-circuit to ground or supply voltage |
| ECC-411 | Blower fan motor. Signal missing |
| ECC-412 | Blower fan motor. Short-circuit to ground |
| ECC-421 | Fan relay. Signal missing |
| ECC-422 | Fan relay. Short-circuit to supply voltage |
| ECC-431 | Blower fan switch. Open-circuit |
| ECC-432 | Blower fan switch. Short-circuit to ground |
| ECC-433 | Blower fan motor. Overcurrent or blocked |
| ECC-440 | Control module. Internal fault |
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.