Engine Protection

See General Information of this manual for information on the DDEC VI operator controls. See the Detroit Diesel DD15 Engine Operator’s Guide for complete details of engine operation.

An engine protection system monitors all engine sensors and electronic components, and recognizes system malfunctions. If a critical fault is detected, an amber Check Engine warning lamp and a red Stop Engine lamp illuminate. See Fig..

The standard parameters that are monitored for engine protection are: low coolant level, high coolant temperature, low oil pressure, and high oil temperature.

Amber Check Engine Warning Lamp

When the amber Check Engine warning lamp comes on for any reason, the vehicle can still be operated, and the driver can proceed to the required destination. See Fig.. This condition should be reported to an authorized service center as soon as possible.

Red Stop Engine Lamp

When the red Stop Engine lamp comes on, the computer has detected a major malfunction in the engine that requires immediate attention. See Fig.. It is the operator's responsibility to shut down the engine to avoid serious damage. This system features a 30-second, stepped-down power-shutdown sequence, or an immediate emergency-running mode, in the event that a major engine malfunction occurs. The conditions that will cause the red Stop Engine lamp to come on are:

• high coolant temperature

• loss of coolant

• high oil temperature

• low oil pressure

• auxiliary shutdown

Stop Engine Override Switch

In the event that the vehicle is operating in a critical location when a shutdown is initiated, a Stop Engine Override (SEO) switch can be used to override the shutdown sequence. See Fig.. This override resets the shutdown timer, restoring power to the level when the red stop engine lamp was illuminated. The switch must be recycled after five seconds to obtain a subsequent override.

Stop Engine Override Switch

Amber Check Engine Warning Lamp

Red Stop Engine Lamp

Fig. 1, Engine Lamps