Safe to driveUntil the next service
J1939 code SPN 1041. Below — how the fault is worded at the factory by KAMAZ, MAZ and YaMZ, and what the second half of the code (FMI) means in the standard.
| FMI 7 | Terminal 50 (starter) permanently closed |
| FMI 8 | Backup engine start button stuck |
| FMI 7 | Terminal 50 circuit fault - Terminal T50 permanently connected to battery positive. Blink code: 1-2-2. The engine will not start. Repair: Check terminal 50 and its wiring. |
| FMI 8 | Duplicate engine-start button circuit fault - Button faulty. Blink code: 3-4-3. Repair: Check the backup engine control start button and its wiring. |
| FMI 7 | Terminal 50 circuit fault (Terminal T50 continuously connected to battery positive). Blink code: 1-2-2. The engine will not start. Repair: Check terminal 50 and its wiring. |
| FMI 8 | Backup engine start button circuit fault (Button faulty). Blink code: 3-4-3. Repair: Check the backup engine control start button and its wiring. |
| SPN 1041 FMI 71041/7 · 1041.7 | mechanical system not responding |
| SPN 1041 FMI 81041/8 · 1041.8 | abnormal frequency or pulse width |
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.