JCB P0612: Control Circuit of the Engine Speed Relay Fault

The fault code indicates an issue with the control circuit of the engine speed relay. This may affect the proper operation of the relay, which is responsible for managing engine speed functions.

1. 1

   The wiring and connections related to the engine speed relay

2. 2

   The integrity of the control circuit

3. 3

   The functionality of the engine speed relay itself

1. 1

   Inspect the wiring and connections

   Check for any damage, corrosion, or loose connections in the wiring and connectors associated with the engine speed relay.

2. 2

   Test the control circuit

   Use a multimeter to test the continuity and voltage in the control circuit of the engine speed relay.

3. 3

   Verify the engine speed relay

   Check the operation of the engine speed relay to ensure it is functioning correctly.