AIC 000158.04 (AIC 158.04) – Low Switched Supply Voltage

AIC 000158.04 (AIC 158.04)

Code: 000158.04

Shortcode: 158.04


This error code, AIC 158.04, is issued when the switched supply voltage to the Armrest Interface Control Unit (AIC) drops below 9.0 volts. This low voltage condition suggests issues such as undercharging, a failing power source, or electrical connections that are not providing sufficient power.


To protect the system from potential malfunctions and ensure safety, the control unit has disabled the function affected by the low voltage.


  • Inspect the power supply components and the connections to the AIC to identify and rectify any causes of the low voltage.
  • Use a multimeter to measure the supply voltage levels to the AIC unit, ensuring they are consistently below the operational threshold and identifying specific points where voltage drops.
  • Check all related wiring and electrical connections for corrosion, looseness, or other damage that could affect voltage delivery.
  • If necessary, replace or repair any faulty components, such as batteries, alternators, or wiring, that are identified as causes of the low voltage issue.
  • Once repairs are made, test the system to confirm that the voltage has returned to appropriate levels and that the disabled function is fully operational again.


Regular monitoring of electrical systems, especially voltage levels to critical control units like the AIC, is crucial to prevent downtime and maintain the reliability and effectiveness of the equipment.