EV CLINIC EQS slaveBMS · TC277T + M95M02v1.7.2
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Your tokens
800.0
Both slaves
800.0 tokens for both slave EEPROMs (TOP + BOTTOM) together, charged once per pair.
Upload the TOP and the BOTTOM dump. When both are recognised the tokens are charged once and both are decoded; the analysis, the health report and the reset files are then included. A file that is not a readable EQS slave dump is rejected without charge.
Upload the TOP and the BOTTOM slave to begin.
detection runs on our server
Upload a slave EEPROM — the full analysis appears here.
Upload a dump — the P-code correlation (modules I–N, suspect cell, predicted DTCs) appears here.
EQS slave BMS · fault-memory reset
Reset operates on whichever slave carries latched faults. Post-repair only: replace/balance the failed cell first, or the slave re-latches the fault.
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Intro:
EQS BMS recovery is the fastest way to bring a locked Mercedes EQS (V297) HV battery back to life. When a single cell drops out, the slave BMS permanently latches a lockout (P1C80) and the car disables the high-voltage system — it will not clear with a normal diagnostic reset. This tool reads the M95M02 EEPROM dump from the slave BMS, decodes the latched DTCs and the internal-resistance map, pinpoints the exact failed cell and module, and builds a clean fault-reset binary ready to flash back. No dealer, no full-pack replacement.Fault codes this tool handles (put as a real list on the page — each line is a long-tail search):
P1C80 – HV component lockout active
P1540 – HV battery low-SOC early warning
P0F18 / P0F64 – Module I voltage too high / too low
P0F19 / P0F65 – Module J voltage too high / too low
P0F1A / P0F66 – Module K voltage too high / too low
P0F1B / P0F67 – Module L voltage too high / too low
P0F1C / P0F68 – Module M voltage too high / too low
P0F1D / P0F69 – Module N voltage too high / too low
P0B63 / P0B64 / P0B67 – Cell voltage sensor faults, module I
P0B6C / P0B71 / P0B76 / P0B7B / P0B80 – Cell sensor faults, modules J–N
U357D – Module I sensor faultSymptoms section (more reach — people search symptoms, not codes):
Common signs: Mercedes EQS won't charge, red battery warning, "Stop vehicle safely" / HV system fault, car stuck after a cell went to 0V, 12V battery drains, battery locked after a deep discharge. If a tester shows P1C80 that keeps coming back, the fault is latched in the slave BMS EEPROM — exactly what EQS BMS recovery clears.Short FAQ (Google loves Q&A for featured snippets):
Q: Can you reset P1C80 on a Mercedes EQS?
A: Yes. P1C80 is an HV-component lockout stored in the slave BMS EEPROM. Once the failed cell is repaired, EQS BMS recovery clears the latched lockout and the pack returns to service.
Q: Which Mercedes does this cover?
A: EQS V297 (and related MMA/EVA2 packs) with the slave BMS using an Infineon TC277T and ST M95M02 EEPROM.
Q: How do I know which cell failed?
A: Upload the TOP and BOTTOM slave BMS dumps — the tool maps every cell's voltage and internal resistance and marks the dead one.
