MTU 12V2000M94 Operating Instructions Manual page 133

8.21.6 Engine Control Unit – Self-test
DANGER
Electric voltage supply for operation.
Danger of burns and fatal electric shock!
• Make certain that the power supply to the product is switched off before starting work. Secure
against unintentional switching on!
ECU7 self-test
1. Switch off power supply to system.
2. Remove connectors X1, X2 and X4 from the
Engine Control Unit.
a) Release lock (3) of connectors (2).
b) Unplug connector (2).
3. Switch on power supply
Result: • The Engine Control Unit is operable if the
diagnostic lamp (1) changes to continuous
illumination within 30 seconds after power
has been switched on.
• If the diagnostic lamp (1) flashes after 30
seconds, replace Engine Control Unit and
(→ contact Service).
• Check the power supply if the diagnostic
lamp remains dark.
4. Switch off power supply.
5. Refit connectors X1, X2 and X4 on Engine
Control Unit.
a) Plug in connector (2).
b) Lock connectors.
MS150061/06E 2016-02 | Accessories for (Electronic) Engine Governor / Control System | 133