Description:

This diagnostic trouble code is generated when the supply voltage (BAT) to the Transmission Control Unit (AutoPowr/IVT) falls below 9 volts, indicating an undervoltage condition.

Reaction:

Limited or no function of the control software until the error is corrected, indicating a serious issue with the power supply.

Recommendations:

Inspect Power Supply:

• Check the battery and charging system to ensure they provide sufficient voltage.
• Ensure the voltage does not drop below 9 volts.

Test Battery Health:

• Verify the battery’s condition and charge level.
• Replace the battery if it is weak or failing.

Examine Electrical Connections:

• Inspect all electrical connections related to the control unit for signs of damage or corrosion.
• Repair or replace any compromised connections.

Verify Alternator Function:

• Ensure the alternator is charging the battery correctly.
• Replace the alternator if it is not functioning properly.

Note:

Maintaining proper voltage levels is crucial for the reliable operation of the control unit. Regular checks on the battery and charging system can help prevent undervoltage issues.