T5 Radiator Fan Always On - P0480 Error Code

Hello,
Perhaps someone can help me, as I'm stuck and can't figure this out. On my T5 Biturbo (manufactured in 2014), the radiator fan is constantly running as soon as the ignition is turned on.
I have already visually inspected the cables for damage (possibly caused by rodents) and all the fuses are still okay, especially fuse number 22.
Here's a peculiar entry:

"Heat extraction temperature in the cooling system: -273.1 °C".

Ist ein Sensor kaputt? But which one?

Thank you for your support!

According to VCDS, I have the following errors.

Address 01: Engine Control Module
Label file: DRV\03L-906-022-CFC.clb

Control unit part number: 03L 906 019 HM. Hardware: 03L 907 309 L.

Component and/or version: R4 2.0l BTD, H38 9983.

Encoding: 0125401A233601080000

Operating number: WSC 47887 006 1048576

ASAM Dataset: EV_ECM20BTD01103L906019HM 004008 (VN75)

ROD: EV_ECM20BTD01103L906019HL_004.rod

VCID: 7DA6FFF46D724882444-8028

"One error found:"



4527 - Radiator fan control 1.

P0480 00 [00101111] - Electrical fault.

confirmed - checked since last deletion.

Environmental conditions:

Error priority: 2

Error frequency: 1

Mileage: 167,430 km

Date: 2000.00.00

Time: 00:00:00



Motor speed: 0.00 rpm.

Normalized load value: 0.0%

Vehicle speed: 0 km/h

Coolant temperature: 20 °C

Intake air temperature: 23 °C

Atmospheric pressure: 930 mbar.

Voltage at terminal 30: 11.980 V.

Lost learning counter via OBD: 40.

Air mass: Target value: 840.0 mg/stroke.

Coolant temperature at the radiator outlet: Actual value: 19.6 °C.

Heat extraction temperature in the cooling system: -273.1 °C.

Outside temperature: 25.0 °C

Cooler fan 2: Control: 0.00%

Cooler fan 1: Control: 10.00%

Fuel temperature: 22.9 °C





Readiness: 0100 0000

Monday, June 17, 2024, 12:50:33:12902

VCDS version: RKS 23.11.0 is running on Windows 11 x64.

http://shop.dieselschrauber.org/en



Address 08: Climate Control Unit.
Label file: DRV\7E5-907-040.clb

Control unit part number: 7E5 907 040 AC. Hardware version: 7E5 907 040 AC.

Component and/or version: Climatronic T5 H19 0407.

Encoding: 0000000103

Operating number: WSC 02757 790 50316

ASAM Dataset: EV_ClimatronicT5 A01003 (VN75)

ROD: EV_ClimaAutoT5Basis_VN75.rod

VCID: 698EBBA409FAC42298C-803C

2 error codes found:



13701888 - Functionality impaired due to received error value.

U1113 00 [00001001] - -

[Engine Control Unit - please read the error memory.]

confirmed - checked since last deletion.

Environmental conditions:

Error priority: 6

Error frequency: 8

Lost Count: 127

Mileage: 167,430 km

Date: 2110.14.00

Time: 11:40:38



9478657 - Control of the rear fresh air blower.

B10A2 01 [00001000] - Electrical fault.

Sporadically - confirmed - checked since last deletion.

Environmental conditions:

Error priority: 2

Error frequency: 13

Lost Count: 167

Mileage: 167487 km

Date: 2110.14.00

Time: 13:57:15

Hello,

For your car's year of manufacture, the radiator fan control unit should be integrated into the fan assembly.

If there are no visible damages to the wiring, I would replace the radiator fan.

First, definitely remove the front bumper/radiator cover and check the wiring. It seems to be a more common issue that the cable is damaged due to friction.

The -273°C value might simply be an arbitrary, recorded boundary condition, and it's not always something to be taken at face value.

Does the high-pressure refrigerant system in the air conditioner work?

Best regards, Rainer.

Thank you for the tip!!! I re-examined all the cables in detail, and indeed: a small control wire was broken. It's working again now .