INTRODUCTION
Detroit Diesel has released Detroit Diesel Electronic Control Unit (ECU) System.
DETAILS AND REASON
DDEC V provides an indication of engine and vehicle malfunctions. The Electronic Control Unit (ECU) continually monitors the DDEC V system. See Figure 1.
Any faults that occur are stored as codes in the ECU’s memory. These codes can be accessed in any of
three ways:
1. A Detroit Diesel Diagnostic Link DDDL® can be used to read the codes.
2. A personal computer (PC) connected to the ECM through a translator device which converts J1708 to RS232 protocol can be used.
3. The Amber Warning Lamp (AWL) or the Red Stop Lamp (RSL) is illuminated.
- The AWL (panel mounted yellow indicator light) illuminated, diagnose the condition
as soon as convenient. - The RSL (panel mounted red indicator light) and AWL illuminated, a major fault occurred
and immediate attention required to avoid engine damage. - Automatic engine shutdown or rampdown is available as an option. A shutdown override
switch is required to allow the vehicle to be moved to a safe location during automatic
shutdown or rampdown.
The Detroit Diesel Diagnostic Link (DDDL) is a sophisticated PC software package that requests and receives engine data and diagnostic codes. The Detroit Diesel Diagnostic Link DDDL supports DDEC V and the Series 60 2004 engine. See Figure 2.
The DDDL functions are:
- Read and display current calibration for an ECU.
- Create a calibration for the ECU on an individual engine.
- Save a single calibration with an ECU password, this same password can be used for fleet of vehicles with the same password or technician who does not have access to the password.
- Change the engine rating of a vehicle.
- Set the injector calibration when you replace the injectors.
- View an audit trail of ECU and injector calibration changes.
