Safe to driveUntil the next service
SPN 523617 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by KAMAZ, MAZ and YaMZ, and what the second half of the code (FMI) means.
| FMI 11 | SPI communication fault with CJ940 power stage module |
| FMI 11 | ECU CJ940 module supply error - Communication error with CJ940 module. Blink code: 2-6-3. Repair: Replace the ECU. |
| FMI 11 | ECU CJ940 module power supply fault (Communication error with CJ940 module). Blink code: 2-6-3. Repair: Replace the ECU. |
| SPN 523617 FMI 11523617/11 · 523617.11 | root cause not known |
Safe to drive. Below — how much time you have and what happens if you keep going.
A standalone fault with no immediate consequences for driving.
Show the codes at the next service. If a second code from the same system appears, stop putting it off.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.