The BYD Yuan Up went on sale in 2024 and is available worldwide. It is also known as the BYD Atto 2 and BYD S1 Pro. In this publication, we will describe the BYD Atto 2 fuses and relays, including fuse box diagrams, their locations, and photo examples. We will highlight the fuse responsible for the cigarette lighter.
The design of the units and the purpose of the elements within them may differ from that shown and depend on the year of manufacture, region of delivery, and the level of electrical equipment in your vehicle.
Passenger compartment
Inside the vehicle, the fuse box is located at the bottom of the dashboard on the driver’s side (left or right side, respectively). To access it, first remove the left black end cover. Next, remove the lower guard.
The fuse box itself will look something like this.
Check the assignment against your diagrams or other technical documentation.
Diagram
Assignment
| F01 | Spare |
| F02 | Spare |
| F03 | 7.5A TMIM (Thermal Management Integrated Module) |
| F04 | 10A OBD-II Diagnostic Port |
| F05 | 5A Instrument Cluster |
| F06 | 5A HFRM (High Frequency Receiving Module, Keyless Entry / NFC) |
| F07 | 5A Shift Control Panel Assembly (Gear Selector Panel) |
| F08 | 20A Infotainment System (Head Unit) |
| F09 | 15A External Audio Amplifier |
| F10 | 7.5A ADAS (Advanced Driver Assistance Systems) |
| F11 | 7.5A Combination Switch (Turn Signal, Wiper, etc.) |
| F12 | Spare |
| F13 | Spare |
| F14 | 10A Wireless Charger |
| F15 | Spare |
| F16 | Spare |
| F17 | Spare |
| F18 | Spare |
| F19 | 30A BDCU (Body Domain Control Unit, Rear Body Controller) |
| F20 | 30A BDCU (Body Domain Control Unit, Rear Body Controller), Circuit 2 |
| F21 | 30A Front Left Power Seat (Driver Seat) |
| F22 | 30A Front Right Power Seat (Passenger Seat) |
A high-power fuse box may be located near the battery (under the passenger seat in facelifted models).
Engine compartment
Under the hood, the main fuse and relay box is located on the front left. To access, remove the top cover of the unit.
The fuse box itself will look something like this.
Check the assignment with your diagrams on the back of the block cover.
Diagram
Designation
| F1 | 60A PTC3 Heater |
| F2 | Spare |
| F3 | Spare |
| F4 | Spare |
| F5 | Spare |
| F6 | Spare |
| F7 | Spare |
| F8 | Spare |
| F9 | 15A HV All-in-One Controller |
| F10 | Spare |
| F11 | Spare |
| F12 | 7.5A Electric Compressor |
| F13 | Spare |
| F14 | Spare |
| F15 | 5A Brake Light Switch |
| F16 | 60A PTC2 Heater |
| F17 | Spare |
| F18 | 30A PTC1 Heater |
| F19 | Spare |
| F20 | 30A Rear Defroster |
| F21 | 30A Front Wiper |
| F22 | Spare |
| F23 | 15A Backup Power Supply |
| F24 | 15A USB |
| F25 | 10A USB |
| F26 | Spare |
| F27 | 15A Backup Power Supply |
| F28 | 15A USB |
| F29 | Spare |
| F30 | 60A IPB (Integrated Power Brake) |
| F31 | Spare |
| F32 | Spare |
| F33 | 15A HV All-in-One Controller |
| F34 | Spare |
| F35 | 5A Rear Body Controller |
| F36 | Spare |
| F37 | 7.5A ETC (Electronic Throttle Control) |
| F38 | 10A SRS (Supplemental Restraint System / Airbags) |
| F39 | 5A ADAS (Advanced Driver Assistance Systems) |
| F40 | Spare |
| F41 | 5A EPS (Electric Power Steering) |
| F42 | 5A IPB (Integrated Power Brake) |
| F43 | Spare |
| F44 | 60A IPB (Integrated Power Brake) |
| F45 | 40A Blower Motor |
| F46 | Spare |
| F47 | Spare |
| F48 | 10A Rear Wiper |
| F49 | 200A Battery |
| F50 | 70A C-EPS (Column Electric Power Steering) |
| F51 | Spare |
| F52 | Spare |
| F53 | 60A Electronic Cooling Fan |
Fuses 27 and 28, rated at 15A, are responsible for the cigarette lighter.
- R1 – PTC3 Relay — 3rd electric PTC heater relay
- R2 – PTC2 Relay — 2nd electric PTC heater relay
- R3 – FAN LO Relay — Low-speed engine cooling fan relay
- R4 – FAN HI Relay — High-speed engine cooling fan relay
If you have anything to add, please write in the comments.