CM850 Electronic Control System – FAULT CODE 497

  Printable Version

Overview

Multi-Unit Synchronization SMALL | MEDIUM | LARGE

Circuit Description

The multi-unit synchronization feature uses an ON/OFF switch and a complementary switch. The complementary switch is used by the ECM to determine the type of coupling (hard or soft) to use between multiple engines when multi-unit synchronization switch is engaged.

Component Location

The multi-unit synchronization switch is mounted by the OEM. Refer to the OEM manual for specific switch location.

Shop Talk

The multi-unit synchronization feature allows two or more engines to be controlled by a single throttle signal and run at a similar speed. There is three engine configurations available with this feature: soft-coupled, hard-coupled, and soft-coupled marine.

The soft-coupled configuration has all secondary engines in parallel with each other. The primary engine outputs a throttle signal to all secondary engines. This setup allows all engines to remain running if a secondary engine stops

The hard-coupled configuration has the primary and all secondary engines in series with each other. The primary engine outputs a throttle signal, which is received by the first secondary engine. This secondary engine then outputs the throttle signal the next secondary engine in the series. This process repeats until the primary engine receives the throttle signal.

The soft-coupled mare configuration has all secondary engines in parallel with each other. The primary engine outputs a throttle signal on the J1939 datalink to all secondary engines.

Refer to Troubleshooting Fault Code t05-497