TEST OR INSPECTION
Reconnect pump operator's panel wire harness water pump engine ECU wire harness
connector to water pump engine ECU. Disconnect pump operator's panel wire harness
pressure governor 12-terminal wire harness connector. Turn battery disconnect switch
check for 5 VDC at wire 1966 from pressure governor 12-terminal wire harness
connector, terminal 1 to a known good ground.
If 5 VDC are not present, replace water pump engine electronic control
unit (WP 0226).