Description:

This error code indicates that the switched supply voltage to the Selective Control Valve Unit VII (SV VII) has exceeded 16.0 V. This condition occurs when the electrical supply voltage provided to SV VII is higher than the specified threshold, which can impact the normal operation of the valve unit.

Reaction:

When this error code is detected, the system will likely experience issues with the functionality of the Selective Control Valve Unit VII. This can lead to improper valve operations, affecting the hydraulic functions controlled by SV VII.

Recommendations:

Inspect Voltage Supply:

• Check the voltage supply to SV VII to ensure it is within the acceptable range (below 16.0 V). Use a multimeter to measure the voltage at the supply point.

Inspect Wiring and Connections:

• Examine the wiring and connectors leading to SV VII for any signs of damage, corrosion, or loose connections. Repair or replace any faulty components.

Vehicle Load Center (VLC) Diagnostics:

• Perform diagnostics on the Vehicle Load Center (VLC) control unit. Since the wake-up circuit of the VLC is the voltage source, it’s crucial to diagnose and resolve any issues within the VLC first. Look for any associated VLC error codes and address them accordingly.

Associated Control Units:

• Check for other 000158.XX codes in other control units. This error code might be present in multiple control units, indicating a broader electrical issue.

Consult Technical Support:

• Contact John Deere technical support if the issue persists after performing the above steps. They can provide further guidance and advanced diagnostic procedures.

Note:

This error code and other related 000158.XX codes can appear in various control units. It is essential to start diagnostics with the VLC control unit, as it is the primary voltage source for the wake-up circuit. Regular maintenance and inspections of the electrical system can help prevent such issues from arising.