Description:

This error code, SIC 000158.03, is generated when the control unit detects that the unswitched supply voltage is above 16 volts. This situation typically arises when the electrical system experiences an overvoltage condition.

Reaction:

When this error code is detected, the equipment may enter a protective mode to prevent damage to the control unit and other sensitive components. This could include shutting down or limiting certain functions to avoid potential harm caused by excessive voltage.

Recommendations:

• Check Charging System:
  • Inspect the alternator and voltage regulator for proper operation. Overcharging can cause the voltage to exceed safe levels.
  • Ensure the alternator output voltage does not exceed the manufacturer’s specifications.
• Inspect Battery:
  • Verify that the battery is in good condition and not overcharging. A failing battery can sometimes cause voltage irregularities.
  • Check for loose or corroded battery connections and clean or tighten as necessary.
• Examine Wiring and Connections:
  • Inspect the wiring harness for any signs of wear, damage, or corrosion that might cause voltage spikes.
  • Ensure all electrical connections are secure and free from corrosion.
• Measure Voltage:
  • Use a multimeter to measure the actual supply voltage at different points in the system to identify where the overvoltage is occurring.
• Update Software:
  • Ensure that the control unit software is up to date, as software updates may contain fixes for voltage regulation issues.

Note:

Excessive voltage can not only cause immediate issues but also lead to long-term damage to electronic components. Regular maintenance and checks of the electrical system can prevent such occurrences. If the issue persists after performing the recommended actions, consult technical support for further diagnosis and resolution.