SPN 630 — Calibration Memory
Do not driveTo the nearest safe stop
J1939 code SPN 630. Below — how the fault is worded at the factory by Bendix ABS/ESP, DAF, Dongfeng, International, KAMAZ, MAZ, Renault Trucks, SITRAK, WABCO ABS/ESC and YaMZ, and what the second half of the code (FMI) means in the standard.
Bendix ABS/ESPDAFDongfengInternationalKAMAZMAZRenault TrucksSITRAKWABCO ABS/ESCYaMZ
Bendix ABS/ESP
| FMI 12 | ECU (1C); ECU (27) |
| FMI 13 | ECU (1D); ECU (1E); ECU (28); ECU (17) |
DAF
| FMI 12 | ECU D984 internal fault 3 |
| FMI 31 | ECU D317 internal fault 3 (extended period) |
Dongfeng
| FMI 12 | Corrupt internal ECM data |
International
| FMI 13 | Calibration Memory — Compass is out of Calibration |
KAMAZ
| FMI 2 | ECU EEPROM: read/write errors. K-line code on KamAZ-5490: MR2 14092. |
| FMI 4 | ECU EEPROM: read/write errors |
| FMI 9 | ECU calibration memory. K-line code on KamAZ-5490: MR2 14149. |
| FMI 12 | ECU EEPROM: read/write errors |
MAZ
| FMI 2 | EEPROM fault - Last EEPROM write error. Blink code: 2-6-5. Repair: Contact a service centre. |
| FMI 4 | EEPROM fault - Last EEPROM read error. Blink code: 2-6-5. Repair: Contact a service centre. |
| FMI 12 | EEPROM fault - Reset to factory values. Blink code: 2-6-5. Repair: Contact a service centre. |
Renault Trucks
| FMI 2 | ABS unit internal fault. Repair: Replace the ABS unit. |
| FMI 5 | EECU control unit not programmed. Repair: Replace the EECU control unit. |
| FMI 12 | Internal ABS memory fault — stored data damaged or erased. Repair: Switch the ignition on for a few seconds, switch it off and wait for the power relay to open. Program the unit. If the fault persists, replace the VECU. Switch the ignition on for a few seconds, switch it off and wait for the power relay to open. If the fault persists, replace the VECU. Program the unit. If the fault persists, replace the VECU. Replace the ABS unit. |
| FMI 13 | Brake valve calibration not done, or the tyre sizes / tone wheels front and rear are incompatible. Repair: Perform the calibration. If the fault persists, replace the EBS unit. Program the EECU. Program the unit. Replace the tyres. |
SITRAK
| FMI 12 | ROM (read-only memory) fault |
WABCO ABS/ESC
| FMI 1 | ATC Configuration Issue |
| FMI 2 | Incorrect ABS System Configuration. EEPROM or Wheel Parameter Incorrect |
| FMI 12 | EEPROM Checksum |
| FMI 13 | ABS System Fault |
| FMI 14 | EEPROM ESC Parameter Incorrect |
YaMZ
| FMI 2 | EEPROM fault (Error on last EEPROM write). Blink code: 2-6-5. Repair: Contact a service centre. |
| FMI 4 | EEPROM fault (Error on last EEPROM read). Blink code: 2-6-5. Repair: Contact a service centre. |
| FMI 12 | EEPROM fault (Reset to factory values). Blink code: 2-6-5. Repair: Contact a service centre. |
What FMI means in J1939
| SPN 630 FMI 1630/1 · 630.1 | data below normal range (most severe level) |
| SPN 630 FMI 2630/2 · 630.2 | data erratic or intermittent |
| SPN 630 FMI 4630/4 · 630.4 | voltage below normal or shorted to ground |
| SPN 630 FMI 5630/5 · 630.5 | current below normal or open circuit |
| SPN 630 FMI 9630/9 · 630.9 | abnormal update rate |
| SPN 630 FMI 12630/12 · 630.12 | faulty device or component |
| SPN 630 FMI 13630/13 · 630.13 | calibration out of range |
| SPN 630 FMI 14630/14 · 630.14 | manufacturer-specific instructions |
| SPN 630 FMI 31630/31 · 630.31 | condition exists (see manufacturer description) |
Can I keep driving
Do not drive. Stop as soon as it’s safe to do so — don’t keep going.
What happens if you keep driving
Time you have: To the nearest safe stopThe code is flagged critical: the manufacturer considers it unsafe to keep driving without checking.
This code alone cannot say what will fail next, so stop at the first safe opportunity and look at it on the spot.
That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.