OMA89851

Symptom	Problem	Solution
WARNING Screen: Pump Motor Drive Power is not detected. Turn off all power. Connect the 7-pin connector. Restart.	Power lost to motor.	Ensure 7-pin connector is plugged into tractor.
	Loose connector or pin.	Check 7-pin connector for proper voltage and inspect pins. See your John Deere dealer.
	Pinched wires in harness.	Inspect harness for damage. See your John Deere dealer.
	Blown fuse.	Check tractor fuses.

WARNING Screen: Pump # Position Sensor not detected. Unable to adjust rate/ calculated rate goes to zero.

Pump position sensor harness lead has an open or short.

Inspect position sensor leads for damage and proper connection.

Check position sensor circuit on wiring harness. See your John Deere dealer for sensor diagnostics.

Unable to adjust rate. Calculated rate goes to zero.

Pump RPM sensor harness has an open or short.

Inspect pump RPM sensor leads for damage and proper connection.

Check pump RPM sensor lead wiring harness. See your John Deere dealer.

WARNING Screen: Pump # No Response to Control Command. Unable to adjust rate.

Pump position sensor harness has an open or short.

Check pump position sensor leads for damage and proper connection.

Check pump position sensor circuit on wiring harness. See your John Deere dealer.

Loose set screw on sensor.

Check motor set screw for tightness.

Motor does not turn.

See your John Deere dealer for motor diagnostics.

Check motor wiring harness for damage.

GreenStar™ display shows “Controller Disconnected”.

Signal lost after power up.

Perform CAN diagnostics. See your John Deere dealer.

WARNING Screen: All Devices Unable to Communicate.

CAN signal lead short to power or ground.

Perform CAN diagnostics. See John Deere dealer.

Motor does not adjust or blown fuse.	Pinched wires.	Inspect for pinched wires and repair.
	Damaged connector pin.	Inspect connector pins and repair.
	Stretched wires due to improper routing.	Inspect for damaged wires and repair.

WARNING Screen: Over Application.

Small rate sprocket used on pump.

Use large sprocket.

WARNING Screen: Under Application.

Large rate sprocket used on pump.

Use small sprocket.

WARNING Screen: V.R. Fert System Problem. Calculated rates may not be accurate.	Drive wheel slippage.	Increase pressure in variable rate fertilizer pneumatic contact wheel spring.
	Incorrect RPM sensor signal.	Adjust sensor for correct gap. If gap is correct, replace sensor.

OUO6074,000106F-19-20090313