Component and circuit defects are detected by the ECM and logged in its defect code memory were they are accessible using diagnostic equipment such as Autologic or Land Rover’s own Textbook system. By connecting to the diagnostic socket under the dashboard, Autologic can read the stored fault codes and receive by the ECM. The characteristics of the signals can tell an experienced operator much about the state of the engine and the DDE system components and circuits. Contrary to popular belief, this information is not necessarily displayed instantly it’s gained only by having a thorough understanding and interrogating the systems.
The injection timing solenoid and its signal characteristics in the timing modulation section of Autologic. Fuel quantity can be diagnosed by observing the signals associated with the fuel quantity servo system, and a procedure can be carried out to test the servo. Diesel engine electronic control is one of the least troublesome systems on the P 38. In most case, electronic diagnosis is the most efficient and often the only way to identify the causes of running and starting problems.
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