23517174 | Genuine Detroit Diesel® EDM Engine Display Module

An EDM (Engine Display Module) 23517174 is a digital display unit used in trucks, heavy equipment, and diesel-powered vehicles to show important engine information to the driver or operator.

General Specifications

Purpose & Function

1. Monitor Engine Health

• Displays vital engine parameters such as:

  • RPM

  • Oil pressure

  • Coolant temperature

  • Fuel level

• Helps prevent damage by alerting the driver to abnormal conditions.

2. Display Warnings and Alerts

• Shows fault codes and warning messages like:

  • Check engine light

  • High engine temperature

  • Low oil pressure

  • Maintenance reminders

• Allows for timely action before problems worsen.

3. Assist in Diagnostics

• Provides access to engine fault codes and system messages.

• Simplifies troubleshooting for mechanics or operators.

4. Enhance Operational Safety

• Alerts the operator to critical issues to avoid engine failure or unsafe driving conditions.

• Can integrate with transmission, ABS, and other systems for a comprehensive vehicle status.

5. Improve Efficiency

• Displays information like fuel economy, turbo boost, or engine hours.

• Helps optimize engine performance and reduce wear.

Signs of a Bad EDM Engine Display Module

1. Blank or Dead Display

• The screen does not turn on

• No information is visible

• Often caused by internal failure, power supply issues, or blown fuses

2. Flickering or Intermittent Display

• Display turns on and off randomly

• Information may appear partially or garbled

• Could indicate internal electronics failure or loose connections

3. Incorrect or Missing Readings

• RPM, oil pressure, coolant temperature, or fuel level show wrong values

• Engine hours or diagnostics may be missing or incorrect

• Can mislead the driver into thinking the engine is okay when it’s not

4. Warning Lights or Fault Codes Malfunction

• Check engine, ABS, or other warning lights stay on permanently or don’t illuminate at all

• Fault codes may not register, or false codes appear

• EDM may fail to communicate properly with the ECU

5. Display Freezes or Lags

• Numbers or gauges stop updating

• The module may freeze on one reading

• Often indicates firmware, internal memory, or processor issues

6. Unresponsive Buttons or Touch Inputs

• If equipped with buttons or touchscreen, they may stop responding

• Prevents navigation through menus or acknowledgment of warnings

7. Communication Errors

• EDM may fail to communicate with the ECU or other modules

• Messages like “No Engine Data” or “Module Not Responding” appear

• Common in vehicles with CAN bus or J1939 networks

8. Dim or Faded Display

• Display is very dim even with proper backlighting

• Could be backlight failure or internal display problem

About Detroit Diesel

Detroit Diesel is a leading American manufacturer of heavy-duty diesel engines, transmissions, and aftertreatment systems, primarily for the commercial trucking industry. Founded in 1938 and now a subsidiary of Daimler Truck North America, Detroit is best known for its DD Series engines — including the DD13, DD15, and DD16 — which power Freightliner and Western Star trucks.

Detroit also produces advanced technologies such as Detroit™ Axles, Detroit™ Connect telematics, and integrated powertrains, offering fleet operators improved fuel efficiency, uptime, and diagnostics. The company is headquartered in Detroit, Michigan, and continues to play a central role in modernizing emissions systems and performance standards in heavy-duty transportation.