This guide explains how to diagnose and fix the Deutz EMR3 Engine Power Out error with error codes 74 / 923.
Error Overview
ECU Type: Deutz EMR3 Engine Control Unit (ArHt1)
Error Description: ENGINE POWER OUT
The engine control unit detects that the PWM output current for engine power is outside the normal range, or that the ECU component controlling the output has exceeded its maximum temperature.
Related Software and Tools
Error Code Details
| Parameter | Description |
|---|---|
| DEUTZ Error Code | 74 |
| Blink Code (short-long-short) | 5 – 5 – 5 |
| SPN | 923 |
| Possible FMI | |
| FMI 3 | Voltage too high or short circuit to +Ubatt |
| FMI 4 | Voltage too low or short circuit to -Ubatt |
| FMI 5 | Current too low or broken wire |
| FMI 2 | Data stream is defective |
Error Detection
- Error Lamp: Constant illumination
- Error Memory: Fault entry recorded in ECU
Possible Causes
- Broken or short-circuited engine power output cable
- Defective output circuit in ECU
- Damaged or loose connection in wiring harness
Recommended Repair Actions
- Inspect wiring: Check for damaged, corroded, or loose cables and connectors.
- Test sensor: Verify the condition and signal output of the related sensor.
- Replace defective sensor if abnormal readings are detected.
- Repair or replace any faulty connection cables.
Additional Error Information
| Property | Description |
|---|---|
| System Reaction | Warning; output shutoff |
| Error Lamp | Permanently on |
| Self-Healing | No |
| Signal Priority | 1 (High) |
| Measurement at Error Time | Output shutoff value |
By following these diagnostic and repair steps, you can effectively resolve the Deutz EMR3 Engine Power Out (74/923) error and restore proper ECU operation.
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