
Search found 5 matches
- Fri Mar 28, 2025 10:40 am
- Forum: VW (VAG, Volkswagen, Audi, Porsche etc.)
- Topic: Battery preheating on ID.4 / MEB
- Replies: 6
- Views: 4691
Re: Battery preheating on ID.4 / MEB
I assembled a LIN responder that emulates the heater and the values I send match what the OBD reports. Unfortunately the BMS does not turn on the circulation pump, even with emulated current draw and big temperature deltas 

- Thu Mar 27, 2025 3:47 pm
- Forum: VW (VAG, Volkswagen, Audi, Porsche etc.)
- Topic: Battery preheating on ID.4 / MEB
- Replies: 6
- Views: 4691
Re: Battery preheating on ID.4 / MEB
Ok, I had to go to a DC fast charger to get the car to actually heat the battery.
ID 15:
Example while heating: 34 BE 00 00 86 4C 3D 42
Byte 1: Current (0.25*X in amps)
Byte 2: HV battery voltage (2*X in volt)
Byte 3,4: Status? Always 0
Byte 5: LV battery voltage (0.1*X in volt)
Byte 6, 7, 8: Temp ...
ID 15:
Example while heating: 34 BE 00 00 86 4C 3D 42
Byte 1: Current (0.25*X in amps)
Byte 2: HV battery voltage (2*X in volt)
Byte 3,4: Status? Always 0
Byte 5: LV battery voltage (0.1*X in volt)
Byte 6, 7, 8: Temp ...
- Wed Mar 26, 2025 8:54 am
- Forum: VW (VAG, Volkswagen, Audi, Porsche etc.)
- Topic: Battery preheating on ID.4 / MEB
- Replies: 6
- Views: 4691
Re: Battery preheating on ID.4 / MEB
I tried getting the car to heat the battery but CAN readouts show 0 amp draw from the PTC battery heater.
ID 28 haven't changed but ID 15 did interesting stuff when connected while first booting up the car.
The first recorded value of ID 15 was 0,189,0,0,135,58,54,55
The fifth byte (135) value ...
ID 28 haven't changed but ID 15 did interesting stuff when connected while first booting up the car.
The first recorded value of ID 15 was 0,189,0,0,135,58,54,55
The fifth byte (135) value ...
- Tue Mar 25, 2025 3:41 pm
- Forum: VW (VAG, Volkswagen, Audi, Porsche etc.)
- Topic: Battery preheating on ID.4 / MEB
- Replies: 6
- Views: 4691
Re: Battery preheating on ID.4 / MEB
I've built a harness, I thought the battery heater was the one documented in the Wiki but it wasn't. It seems the ID.4 heater (1EE.963.231) is built by BorgWarner and has a slightly different LIN bus communication scheme.
Every 50ms a PID is polled, alternating between:
ID 15 (0x0F): 8 bytes, in my ...
Every 50ms a PID is polled, alternating between:
ID 15 (0x0F): 8 bytes, in my ...
- Sat Mar 15, 2025 12:29 pm
- Forum: VW (VAG, Volkswagen, Audi, Porsche etc.)
- Topic: Battery preheating on ID.4 / MEB
- Replies: 6
- Views: 4691
Battery preheating on ID.4 / MEB
Hello,
I’m looking into fixing battery preheating on my 2022 ID.4 and this forum is packed with great information.
My current thinking is to man-in-the-middle the LIN bus to the Z132 HV battery heater and turn it on for a X time. More info at https://github.com/jagheterfredrik/meb-preheat ...
I’m looking into fixing battery preheating on my 2022 ID.4 and this forum is packed with great information.
My current thinking is to man-in-the-middle the LIN bus to the Z132 HV battery heater and turn it on for a X time. More info at https://github.com/jagheterfredrik/meb-preheat ...