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Diesel Electronic Diagnostic

DED (Diesel Electronic Diagnostic) is designed to give the commercial vehicle or diesel technician a thorough insight into electronic fault diagnostics of diesel vehicles. This seminar makes the increasingly complex onboard vehicle electrical systems simple to understand and easy to diagnose.

  • DED
Diesel training
QUICK FACTS

COURSE ID: DED
DURATION: 2 DAYS

Prerequisites: None

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COURSE ID: ATS1-1

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Quick Overview

  • Learn to predict signal voltages in wiring diagrams and find defects in any electronic system quickly and accurately.
  • We’ll look at fault code settings of the ECU, how and why codes are triggered and when they are not.
  • We cover in detail variable resistor circuits, inductive and hall sensor circuits, solenoid valve and relay circuits, temperature sensor circuits and transistors. We study them individually and the effect they have on each other.
  • Analyse common rail pressure sensor output and control and understand the diagnostics.
  • Actuator diagnostics - how a computer compensates to hide faults, what signals are normal and how to pick out faults.
  • Hands-on learning by making circuits and actual measurements.
  • We welcome any level of technician to this training. DED is foundational in nature and it will provide a strong understanding of electric diagnostics from apprentice level through to fresh insights for the seasoned technician.

Comprehensive Overview

The following will be taught and discussed in detail:

Wiring Diagrams
• How to predict signal and supply voltages while reading a wiring diagram before actually measuring and signal and current flow.

• Detect trouble spots and learn how to easily discover bad connections.  Understand how poor connections can have a direct effect on adaption values.

Components Parallel & Series
• Predict voltages in simple wiring diagrams and measure on different types of circuits with regards to diagnostics.

• The effect of failures within a circuit and transistor switched circuits, theory and practical.

Resistors / Resistance Diagnostics
• Effects of poor connections on sensors and actuators, and how they occur.

• How to locate bad connections in actuator and sensor circuits, and the flow-on effect from one faulty circuit that can affect others.

• Poor connections to the ECU and the effect it can cause, we also discuss ECU fault code setting procedure.

AECS Training DED

Inductive Sensors
• Coil/core construction of inductive sensors.
• Magnetic field disturbance and signal generation.
• ECU trigger values and fault code setting methods by the ECU.
• Relation between, for example, crank and camshaft sensor signals.

Hall Sensors
• Working principle of hall sensors from a diagnostic perspective.
• Signal diagnostics and ECU trigger values.
• Fault code settings via soft parameters.
• How to diagnose signal with multimeter.
• Latest Toyota Hall sensor variation and fault codes triggers and common faults.

Short Circuit Diagnostics
• How to locate different types of short circuits in a sensor circuit with the aid of measurement equipment and fault codes.

• The effect of short circuits variants (either full short or part short circuits) on the engine management system.

 Automotive Variable Resistors
• Carbon track and measuring vane construction and principles.
• How to diagnose faults
• Fault code setting methods by the ECU, including ECU hard and soft trigger values (for understanding generic ECU working principles).
• Dual variable resistor track in drive by wire systems.

Solenoids & Relays
• Magnetic fields and the effect on cores and needles.
• NO and NC valves.
• Activation and de-activation of coils.
• How induced spikes are generated and where they are affecting the overall electronic system.
• Protection circuits in relays and the most commonly made connection mistakes with regards to protection circuits.

Multimeter Knowledge
• Proper measuring practices on electronic systems.
• Shortcomings of multimeters in electronics.
• Why you shouldn’t use Ohms/ resistance measurements in most diagnostics.

Temperature Sensors
• Circuit description in and outside the ECU
• Voltage signal understanding includes diagnosing the thermostat without taking it out of its housing.
• Fault code setting methods by the ECU.
• ECU trigger values.
• The impact of bad connections and shorts, specifically on a modern CAN data bus system.

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