Low-voltage of Control Power Supply (ECM)

What does 5 mean?

The 24V control power supply voltage to the ECM has dropped below the acceptable threshold. This can lead to improper operation or shutdown of the ECM.

• The control power supply voltage (e.g., 24VDC) is below the minimum operational threshold.
• Power supply unit failure or overload.
• Loose wiring or poor connection to the control power input.
• External short circuit on the control power lines.
• Battery for control power is depleted or faulty.

Click steps to track your progress.

1. 1

   Measure the 24V control power supply voltage at the input terminals to the ECM.

2. 2

   Check the external 24V power supply unit for proper operation and load capacity.

3. 3

   Inspect the wiring from the 24V power supply to the ECM for voltage drops or loose connections.