Detroit Diesel has released Detroit Diesel Electronic Control Unit (ECU) System.

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.

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