Do not driveMinutes
J1939 code SPN 1072. Below — how the fault is worded at the factory by DAF, Dongfeng, KAMAZ, MAZ, Renault Trucks, SITRAK and YaMZ, and what the second half of the code (FMI) means in the standard.
DAFDongfengKAMAZMAZRenault TrucksSITRAKYaMZ
| FMI 3 | Engine brake B192 short to power supply/open circuit at ECU pin B55 |
| FMI 4 | Engine brake B192 short to ground at ECU pin B55 |
| FMI 3 | Short circuit to power or open circuit of engine brake control signal 1. Scan tool code: P1202. Effect: Torque limited, the engine may shut down. |
| FMI 4 | Short circuit to ground of engine brake control signal 1. Scan tool code: P1203. Effect: Torque limited, the engine may shut down. |
| FMI 3 | Engine brake decompression throttle. K-line code on KamAZ-5490: ADM3 10003. |
| FMI 4 | Engine brake decompression throttle. K-line code on KamAZ-5490: ADM3 10004. |
| FMI 255 | Engine brake decompression throttle |
| FMI 2 | Engine brake decompression throttle driver circuit fault - Overheating. Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 3 | Engine brake decompression throttle driver circuit fault - Short to battery positive. Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 4 | Engine brake decompression throttle driver circuit fault - Short to ground. Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 12 | Engine brake decompression throttle driver circuit fault - Open circuit. Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 4 | Jacob engine brake, stage 1 — short to ground. Repair: Check the JACOB 1 solenoid valve and the wiring (A 8, A 32). Check the solenoid valve and the wiring (J 1/20, J 1/43). |
| FMI 5 | Jacob engine brake, stage 1 — open circuit or short to battery positive. Repair: Check the JACOB 1 solenoid valve and the wiring (A 8, A 32). Check the solenoid valve and the wiring (J 1/20, J 1/43). |
| FMI 0 | Fault on engine brake valve #1. Scan tool code: P1202. Effect: Loss of communication with the modules, some functions are disabled. |
| FMI 1 | High-side short to battery on engine brake valve #1. Scan tool code: P1202. Effect: Loss of communication with the modules, some functions are disabled. |
| FMI 2 | High-side short to battery on engine brake valve #1. Scan tool code: P1202. Effect: Torque limited, the engine may shut down. |
| FMI 3 | High-side short to ground on engine brake valve #1. Scan tool code: P1202. Effect: Torque limited, the engine may shut down. |
| FMI 4 | Open load on the low side of engine brake valve #1. Scan tool code: P1203. Effect: Torque limited, the engine may shut down. |
| FMI 5 | Low-side short to battery on engine brake valve #1. Scan tool code: P1203. Effect: Torque limited, the engine may shut down. |
| FMI 6 | Low-side short to ground on engine brake valve #1. Scan tool code: P1203. Effect: Torque limited, the engine may shut down. |
| FMI 7 | Low-side short to ground on engine brake valve #1. Scan tool code: P1203. Effect: Torque limited, the engine may shut down. |
| FMI 22 | Low-side short to battery on the ECR valve. Scan tool code: P0475. |
| FMI 23 | Low-side short to ground on the ECR valve. Scan tool code: P0475. |
| FMI 2 | Engine brake decompression throttle driver circuit fault (Overheating). Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 3 | Engine brake decompression throttle driver circuit fault (Short to battery positive). Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 4 | Engine brake decompression throttle driver circuit fault (Short to ground). Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
| FMI 12 | Engine brake decompression throttle driver circuit fault (Open circuit). Blink code: 3-2-5. Repair: Check the engine brake decompression throttle and its wiring. |
Do not drive. Stop as soon as it’s safe to do so — don’t keep going.
Part of the brake circuit or ABS/EBS is out of service. The pedal may still feel normal — until the first emergency stop or descent.
Next comes longer stopping distance, a skid on a slick surface, failure on a long downgrade. This is the case where "I will take it slow" does not work.
Let the air system build to working pressure and listen for leaks. Don’t drive with faulty brakes.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.