JCB P0685: Main ECU Relay Stuck

The Main ECU relay is stuck in its current position, which may prevent proper operation of the system it controls. This condition can affect the functionality of the component connected to the relay.

1. 1

   Main ECU relay

2. 2

   related wiring

3. 3

   power supply to the relay

1. 1

   Inspect

   Inspect the Main ECU relay for physical damage or signs of overheating.

2. 2

   Test

   Test the operation of the Main ECU relay to determine if it is stuck in the closed or open position.

3. 3

   Replace

   If the Main ECU relay is found to be stuck, replace it with a compatible unit.