CONTROL FUNCTIONS (CONT’D)

Starter motor start prevention

When the key switch is turned on, the Eco-governor performs rack self-diagnostics before starting the engine in order to check the fuel injection pump rack operation. Starter motor staring prevention can be implemented by connecting a starter relay to the E-ECU. As shown in [Figure 10-40-27], the starter motor start prevention is done by connecting the E-ECU to the starter relay.

The starter motor start prevention factor is checked by connecting the engine diagnosis tool to see the prevention factor flag [See "Logging function" on page 10-40-56].

In addition to rack self-diagnostics, the E-ECU has the following features:

•Safety relay (standard feature)

This feature turns the starter off when the engine speed reaches 675 min-1, and disables the starter to start until the engine speed decreases to 325 min-1 or less. (This feature is the same as provided by 119802-77200 when the pulley ratio is 2).

•Starter disable (optional feature)

This feature turns off the starter when it is energized continuously for 30 seconds, and disables it to be energized for 30 seconds, thereby providing protection to the starter.

CONTROL FUNCTIONS (CONT’D)

Application Interface Outline (Cont’d)

•External switch control (optional feature)

This feature allows the starter to be disabled until an external switch turns on. This can be used for creating a safety system where the starter cannot start unless a safety pedal is depressed. Like[Figure 10-40-28], the external switch can be connected to APP-IP1 terminal (E24: in common use for droop selection). Also, the starter can be enabled via CAN communication in place of contact input at APP-IP1 terminal. Furthermore, the starter can also be enabled by the AND of the APP-IP1 contact input and the CAN communication input.

When the coexistence of droop selection feature and starter prevention external switch feature is desired, the external switch can be connected to the APP-IP4 terminal (E17: in common use with SW2), as shown in [Figure 10-40-29]. In this case, the switch input becomes low-side input. The conditions that enable the starter can be changed using map flags for setting E-ECU applications.