ECU 000168.17 – ECU Supply Voltage Critically Low at High RPM. John Deere System Advisory.

ECU 000168.17 (ECU 168.17)

Code: 000168.17

Shortcode: 168.17

Description:

Error code ECU 000168.17 is issued when the Engine Control Unit’s (ECU) supply voltage drops below 12.5 volts while the engine speed is above 1500 rpm. This may indicate issues with the charging system, such as an underperforming alternator or deteriorating battery, particularly under load.

Reaction:

The low voltage at high engine speeds may cause the control software to function improperly, with possible limitations or complete lack of functionality, impacting vehicle operations and safety.

Recommendations:

  • Check Battery and Alternator: Ensure the battery is in good condition and the alternator is capable of maintaining sufficient charge at higher RPMs.
  • Inspect Electrical Connections: Look for loose or corroded connections that might affect voltage stability.
  • Load Test Charging System: Perform a load test to evaluate the charging system’s ability to handle higher demands.
  • Replace Faulty Components: If any components of the charging system are found to be deficient, replace them.
  • Reset ECU: After repairs, reset the ECU to clear any fault codes and restore normal operation.

Note:

Maintaining a stable and adequate supply voltage under all operational conditions is crucial for the health and performance of the vehicle’s electrical systems.


Control Units: John Deere