Turn ignition key off, then on again. If code goes away, resume operation. If problem persists, go to next system check.

Intermittent wiring connection.

Check all CAN wiring connectors and reconnect.

Inspect connectors for damage and repair.

Missing terminator

Verify terminators are installed.

Bad terminator

See your John Deere dealer.

Check fuses to CCU.

Fill tank with solution. Check tank for leaks or damage.

Solution control valves set incorrectly.

Set valves correctly. (See Setting Minimum Pressure in SprayStar System section.)

Solution pump fuse faulty.

Replace fuse.

Solution pump bleed line kinked or forms traps.

Unkink bleed line.

Solution pump bleed line plugged.

Unplug pump bleed line.

Suction line plugged or collapsed.

Clean or replace suction line.

Spraying in transport range.

Shift to field range.

Plugged solution lines.

Unplug and flush.

Boom strainer plugged.

Remove, clean and install strainer.

Solution pump is not primed.

Prime solution pump. (See Priming Solution Pump in Wet System section.)

Solution pump impeller clogged.

Separate pump housing and clean impeller.

Low or no hydraulic oil.

Fill hydraulic reservoir to specification (see Check Hydraulic Oil Level—Daily in Prestarting Checks section).

Dirty or plugged flowmeter.

Remove, clean with brake cleaner and install flowmeter.

Solution tank valve closed.

Open valve.

Proportional valve electrical connection faulty.

Clean, replace or repair connection.

Hydraulic shuttle valve faulty.

Replace or repair shuttle valve.

Nut on solution pump impeller came off.

Install solution pump impeller nut.

Pressure sensor inoperative.

See your John Deere dealer.

Shaft between solution pump and hydraulic motor faulty.

See your John Deere dealer.

Solution pump failure.

See your John Deere dealer.

Proportional valve assembly faulty.

See your John Deere dealer.

Hydraulic pump faulty.

See your John Deere dealer.

Hoses between reservoir, hydraulic pump combo valve, proportional valve assembly, and motor faulty or incorrectly installed.

See your John Deere dealer.

Check valve stuck open in proportional valve assembly or combo valve assembly.

See your John Deere dealer.

Strainer shut-off valve closed.

Open valve.

Flowmeter shut-off valve closed.

Open valve.

Operate engine at 2550 rpm.

Nozzle tips worn.

Replace nozzle tips with new tips properly calibrated for current application.

Solution pump impeller clogged.

Separate pump housing. Remove and clean impeller.

Suction line partially blocked or collapsed.

Clean, repair or replace suction line as necessary.

Air leak in suction line.

Repair or replace suction line.

SprayStar not programmed properly.

Setup SprayStar. (See Setup SprayStar in SprayStar System section.)

Pressure line leaking.

Repair or replace pressure line as necessary.

Low or no hydraulic oil.

Fill hydraulic reservoir to center of sight tube.

Pressure sensor faulty.

See your John Deere dealer.

Shaft between solution pump and hydraulic motor faulty.

See your John Deere dealer.

Solution pump shaft seal(s) leaking.

See your John Deere dealer.

Proportional valve faulty.

See your John Deere dealer.

Hydraulic pump faulty.

See your John Deere dealer.

Hydraulic shuttle valve faulty.

See your John Deere dealer.

Hoses between reservoir, hydraulic pump priority valve, proportional valve assembly, and motor faulty.

See your John Deere dealer.

Missing bleed valve orifice.

See your John Deere dealer.

Check valve stuck open in hydraulic load sense line.

See your John Deere dealer.

Clean strainers.

Spray nozzles plugged.

Clean and inspect nozzles. Check orifices and calibration of nozzles. Replace nozzles as necessary.

Boom supply hoses partially or completely plugged.

Clean out hoses.

SprayStar not programmed properly.

Setup SprayStar. (See Setup SprayStar in SprayStar System section.)

High/low flow valve in wrong position.

Turn high/low valve to correct position. (See Applying Low Application Rates in Wet System section.)

Minimum pressure set too high.

Lower minimum pressure setting.

Dirty or faulty flowmeter.

Clean with brake cleaner daily.

Boom shut-off valves faulty.

See your John Deere dealer.

Pressure sensor faulty.

See your John Deere dealer.

Faulty proportional valve assembly.

See your John Deere dealer.

Determine minimum pressure required and enter into SprayStar. (See Setting Minimum Pressure in SprayStar System section.)

Inadequate solution supply in tank.

Fill solution tank.

High/low flow valve in wrong position.

Turn high/low valve to correct position. (See Applying Low Application Rates in Wet System section.)

Solution contains heavy solids (poor mixture).

Check engine and pump speed. Check agitation line and valves. Be sure agitation jets are not clogged.

Spray nozzles plugged.

Clean and inspect nozzles. Check orifices and calibration of nozzles. Replace nozzle(s) as needed.

Flowmeter dirty or stuck.

Clean flowmeter with brake cleaner.

Incorrect Sprayer Response min/max value in controller adjust.

Enter correct min/max setting in SprayStar display. (See Setting Sprayer Response in SprayStar System section.)

Boom charge not on when it should be.

Set boom charge correctly.

Boom supply hoses to booms partially plugged or collapsed.

Remove and inspect solution hoses to booms. Clean or replace hoses as necessary.

Boom section shut-off valve(s) faulty.

See your John Deere dealer.

Pressure sensor faulty.

See your John Deere dealer.

Faulty proportional valve assembly.

See your John Deere dealer.

Nurse tank valve at tank instead of end of line putting air in system.

Put nurse tank valve at end of line.

Determine minimum pressure required and enter into SprayStar. (See Setting Minimum Pressure in SprayStar System section.)

Boom air purge allowing air into system.

Verify boom air purge is not activated or see your John Deere dealer.

Front fill air purge valve allowing air into system.

Verify valve closed.

Inadequate solution supply in tank.

Fill solution tank.

High/low flow valve in wrong position.

Turn high/low valve to correct position. (See Applying Low Application Rates in Wet System section.)

Solution contains heavy solids (poor mixture).

Check engine and pump speed. Check agitation line and valves. Be sure agitation jets are not clogged.

Spray nozzles plugged.

Clean and inspect nozzles. Check orifices and calibration of nozzles. Replace nozzle(s) as needed.

Flowmeter dirty or stuck.

Clean flowmeter with brake cleaner.

Incorrect sprayer response min/max valve in controller adjust.

Enter correct min/max setting in SprayStar display. (See Setting Sprayer Response in SprayStar System section.)

Boom charge not on when it should be.

Set boom charge correctly.

Solution hoses to booms partially plugged or collapsed.

Remove and inspect solution hoses to booms. Clean or replace hoses as necessary.

Boom section shut-off valve(s) faulty.

Repair or replace boom section shut-off valve(s).

Air trapped in solution system.

Verify air is bled out of high spots.

Pressure sensor faulty.

See your John Deere dealer.

Faulty proportional valve assembly.

Repair or replace.

Nurse tank valve at tank instead of end of line putting air in system.

Put nurse tank valve at end of line.

Boom supply line bleed line plugged or check valve faulty.

Clean or replace line or check valve.

“Zero-out” pressure sensor. (See Calibrating Pressure Sensor in SprayStar System section.)

Faulty proportional valve assembly.

See your John Deere dealer.

Tighten connection and/or apply sealant.

Replace impeller or (See your John Deere dealer.)

Plugged hydraulic compensator strainer.

Remove, inspect and clean strainer. (See your John Deere dealer.)

Faulty solution pump.

Repair or replace solution pump.

Hydraulic standby pressure set too low.

See your John Deere dealer.

Faulty proportional valve.

Replace proportional valve.

Faulty priority valve.

See your John Deere dealer.

Faulty hydraulic pump.

See your John Deere dealer.

Connect wiring.

Wheel speed calibration or radar calibration in SprayStar incorrectly set.

Calibrate wheel speed sensor. (See Calibrating Wheel Speed Sensor or Calibrating Radar Sensor (Optional) in SprayStar System section.)

Bad ground.

Check ground.

Speed sensor connector pins corroded.

Clean connector.

Speed sensor misadjusted.

See your John Deere dealer.

Disconnect radar and use wheel speed sensor.

Jumper wire not installed on radar electrical connector when radar is disconnected.

Install jumper wire. (See Calibrating Wheel Speed Sensor in SprayStar System section.)

Wheel speed calibration or radar calibration in SprayStar incorrectly set.

Calibrate wheel speed sensor. (See Calibrating Wheel Speed Sensor or Calibrating Radar Sensor (Optional) in SprayStar System section.)

Bad ground.

Check ground.

Radar or wheel speed sensor faulty.

See your John Deere dealer.

Wheel speed sensor misadjusted.

See your John Deere dealer.

Enter correct calibration information in SprayStar display. (See Setting Flowmeter Calibration Number in SprayStar System section.)

Flowmeter wiring harness disconnected.

Connect flowmeter wiring harness connector.

Flowmeter plugged or dirty.

Clean flowmeter.

Flowmeter connector pins corroded.

Clean connector.

Flowmeter wiring harness damaged.

Repair or replace wiring harness.

Flowmeter installed backwards.

Remove and install flowmeter correctly. (Arrow located on flowmeter body indicates direction of flow.)

Speed sensor faulty.

See “speed” Indicates “0” in this section.

Spray not discharging from nozzles.

Refer to No Discharge From Nozzles symptom in this group.

Flowmeter faulty.

See your John Deere dealer.

Boom calibration numbers incorrect.

Enter correct nozzle numbers, sections, and spacings in SprayStar display.

Enter correct calibration information in SprayStar display. (See Setting Flowmeter Calibration Number in SprayStar System section.)

Flowmeter partially plugged or dirty.

Disassemble, clean and assemble flowmeter.

Flowmeter connector pins corroded.

Clean connector.

Flowmeter wiring harness damaged.

Repair or replace wiring harness.

Solution contains heavy solids (chemicals not properly mixed with the water).

(See Solution Contains Heavy Solids symptom in this group.)

Air leak in suction side of pump.

Repair air leak.

Flowmeter sensor not screwed in all the way.

Screw flowmeter completely into passage.

Flowmeter faulty.

See your John Deere dealer.

Speed sensor faulty.

(See “speed” Indicates “0” in this section.)

Display set to high flow but valve to second flowmeter closed.

Open valve to second flowmeter.

Display set to low flow but valve to second flowmeter open.

Close valve to second flowmeter.

Adjust spraying to keep spray overlap to a minimum.

Large gap between sprayer passes.

Adjust spraying to minimize gaps.

Wheel speed and radar calibration information incorrectly entered in SprayStar display.

Enter correct calibration information in SprayStar display. (See Setting Flowmeter Calibration Number in SprayStar System section.)

Improper data entered in SprayStar boom setup.

Enter proper data for boom setup. (See Setup SprayStar System section.)

Minimum pressure too high causing over application.

Decrease minimum pressure setting in SprayStar display. (See Setting Minimum Pressure in SprayStar System section). Choose different nozzles for higher pressure setting at same speed.

Radar picking up signal for tall crops.

Switch to wheel speed sensor in tall crops.

Left front wheel spinning causing wheel speed sensor to give improper speed.

Recalibrate wheel speed sensor or switch to radar in muddy or hilly conditions.

Check if spray discharges from nozzles.

Refer to No Discharge From Nozzles symptom in this group.

Display set to high flow but valve to second flowmeter closed.

Open valve to second flowmeter.

Display set to low flow but valve to second flowmeter open.

Close valve to second flowmeter.

Mix chemicals properly. (See chemical label.)

Agitation valves closed or do not open adequately.

Open agitation valve as necessary.

Spray off pressure not set high enough for proper agitation.

Increase spray off pressure setting.

Incorrect engine rpm.

Run engine at 2550 rpm.

Pump not running at specified rpm.

Check hydraulic flow to hydraulic motor on pump.

Agitation nozzles plugged.

Unplug agitation nozzles.

Agitation nozzles installed backwards.

Install agitation nozzles correctly.

Faulty agitation nozzles.

Replace agitation nozzles.

Clean fill strainer

Set valves correctly.

Air in pump.

Allow solution to fill pump and push air out before running pump.

Fill strainer plugged.

Clean fill strainer.

Pump priming procedure incorrect.

Prime solution pump correctly. (See Priming Solution Pump in the Wet System section.)

Pump bleed line kinked or forms a trap.

Route bleed line so it goes directly upward from pump to solution tank.

Pump bleed line partially or entirely plugged.

Clean or blow out pump bleed line.

Nurse tank hose does not have shut-off valve or has valve on nurse tank end of hose.

Install shut-off valve on end of nurse tank hose.

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