John Deere 000168.01: Low Battery Voltage At Engine Module Below 9 Volts (ECU)

The engine module is detecting a voltage level at the battery that is below 9 volts, which may indicate a weak or failing battery, a charging system issue, or a problem with the electrical connections to the engine module.

1. 1

   Battery voltage

2. 2

   Battery connections

3. 3

   Charging system

4. 4

   Engine module wiring

1. 1

   Measure battery voltage

   Use a multimeter to check the battery voltage when the engine is off and when the engine is running.

2. 2

   Inspect battery connections

   Check for corrosion, loose connections, or damaged terminals on the battery.

3. 3

   Test charging system

   Verify that the alternator is producing the correct voltage and that the charging system is functioning properly.

4. 4

   Check engine module wiring

   Inspect the wiring and connections between the battery and the engine module for damage or poor contact.