Cause of error code E60

Return water temperature sensor is shorted. '0' Ohm

Solution for error code E60

1. Disconnect harness from return temperature sensor. Measure resistance across sensor terminals. Is resistance less than 50 ohms? 
Yes: Replace return water sensor.
No: -> 2

2. Disconnect harness from controle module J5. Measure resistance between brown wires at terminals J5-4 and J5-12. Is resistance less than 50 ohms? 
Yes: Replace wires
No: Replace control module.