KIT-ENGINE OVERHAUL 3799131 - Caterpillar

Table 1
J1939 Code and Description CDL Code and Description Comments
561-31
TCS/ASR Engine Control Active 48-1
Backup ECM Took Control The secondary Electronic Control Module (ECM) detected that the primary ECM is having difficulties controlling the engine.
The secondary ECM assumes control of the engine.
The code is logged. Probable Causes
Codes
Voltage
Heartbeat
Engine overspeedThe primary Electronic Control Module (ECM) periodically broadcasts a message over the CAN data link and CDL Data Links that communicates the condition of the primary ECM. This message is recognized by the secondary ECM as the ECM heartbeat status of the primary ECM. If the heartbeat message is lost or unreadable, the