Fault Messages From Ddec Engine Governor - MTU 12 V 4000 C10 Operating Instructions Manual

6.2 Fault messages from DDEC engine governor

The DDEC engine governor generates alarms which are indicated in different ways depending on the
equipment configuration:
• Two-digit flashing code
• Fault code and text on a display or PC screen
To facilitate troubleshooting without additional auxiliary equipment, the two-digit flash codes can be read
out from the DDEC by means of the vehicle-side alarm lamps CHECK ENGINE LIGHT (yellow) and
STOP ENGINE LIGHT (red).
Two switches (DIAGNOSTIC REQUEST) must be provided in the plant in this case. The first switch is
used for reading out the flash codes of the master DDEC unit, the second one to read out the receiver
DDEC unit. The flash-code signals from master and receiver are transmitted to the same alarm lamps.
Active codes:
indicated by STOP ENGINE LIGHT (red)
Activation of "FLASH-CODES":
1. Set "IGNITION" switch to ON.C.
2. Actuate "DIAGNOSTIC REQUEST" switch of Master or Receiver.
3. Read-off codes.
4. Identify fault on the basis of the DDC fault code list.
Example:
Active code 23:
STOP ENGINE LIGHT lamp
flashes:
Flashing phase 1
О О
2 x flash
There is a pause lasting 0.5 seconds between flashing phases 1 and 2. There is a pause of approx. 3
seconds on changing between active and inactive code.
Switch off the "DIAGNOSTIC REQUEST" and "IGNITION" switches to cancel "FLASH-CODE" indication.
The "IGNITION" switch may only be switched back on after a 30 sec. delay.
Precise fault diagnosis is, however, not possible using this method as any one flashing code may be
used to cover several different fault causes.
Detailed diagnosis is possible using the Diagnostic Data Reader (DDR) readout/programming unit.
The Diagnostic Data Reader (DDR) is used to:
• Read out DDEC electronics fault messages
• Change a limited scope of parameters
Active and inactive fault codes can be read out with the DDR via separate menus. Inactive fault codes
stored in the governor can also be deleted.
Refer to the DDR device description for details of the range of features.
The DDR (part no. 5355383601/77) comprises:
• One Pro Link 9000 basic unit
• One cartridge to accommodate a PCMCIA plug-in circuit board (MPC cartridge)
• One PCMCIA plug-in circuit board
• One connecting cable
• An additional adapter cable is also required (part no. J 38500 60A)
52 | Troubleshooting | MS150049/02E 2012-11
Inactive codes:
indicated by CHECK ENGINE LIGHT (yellow)
Inactive code 34:
CHECK ENGINE LIGHT lamp
flashes:
Flashing phase 2 Flashing phase 1
О О О О О О
3 x flash 3 x flash
Flashing phase 2
О О О О
4 x flash