FCC 000158.01 – Instrument Unit, Supply Voltage (ELX) Too Low

FCC 000158.01 (FCC 158.01)

Code: 000158.01

Shortcode: 158.01

Description:

This error code indicates that the supply voltage to the Instrument Unit (ELX) has fallen below 12.5 volts while the engine speed is above 1500 RPM. This typically suggests an issue with the battery, alternator, or associated electrical connections.

Reaction:

The control software will have limited or no functionality due to the undervoltage condition, impacting the performance and operation of the instrument unit.

Recommendations:

  • Inspect Battery and Charging System: Check the battery health and ensure the alternator is charging correctly.
  • Examine Electrical Connections: Look for loose, corroded, or damaged electrical connections that might be causing a voltage drop.
  • Test Alternator Output: Ensure the alternator is providing adequate voltage output under load.
  • Check Grounding Points: Verify that all grounding points are secure and free of corrosion.

Note:

Operating with low voltage can cause malfunctions in the Instrument Unit and lead to inaccurate readings or failures. Regular maintenance and checks can help prevent such issues.


Control Units: John Deere

John Deere Parts
John Deere Logo