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

Intermittent wiring connection

Check all CAN wiring connectors and reconnect.

Inspect connectors for damage and repair.

Missing terminator

Verify that terminators are installed.

Faulty terminator

See your John Deere dealer.

Check fuses to CCU.

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

Solution control valves incorrectly set

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

Solution pump faulty fuse

Replace fuse.

Solution pump bleed line kinked or forms traps

Unkink bleed line.

Clogged solution pump bleed line

Clean pump bleed line.

Clogged or collapsed suction line

Clean or replace suction line.

Spraying in fourth speed range

Shift to first or second speed range.

Clogged solution lines

Unplug and flush.

Clogged spray boom strainer

Remove, clean, and install the strainer.

Solution pump is not primed

Prime solution pump. (See Prime Solution Pump with Rinse Tank Water in Solution System Section.)

Clogged solution pump impeller

Separate pump housing and clean impeller.

Low hydrostatic/hydraulic oil level

Fill up the reservoir to the specified level. Check the system for leaks.

Dirty or clogged flowmeter

Remove, clean with brake cleaner, and install the flowmeter.

Solution tank valve closed

Open valve.

Faulty electrical connection from the proportional valve

Clean, replace, or repair connection.

Faulty hydraulic shuttle valve

Replace or repair shuttle valve.

Nut on the solution pump impeller came off

Install impeller nut of the solution pump.

Pressure sensor inoperative

See your John Deere dealer.

Faulty driveshaft between the solution pump and hydraulic motor

See your John Deere dealer.

Solution pump failure

See your John Deere dealer.

Faulty proportional valve assembly

See your John Deere dealer.

Faulty hydraulic pump

See your John Deere dealer.

Faulty on the hoses between reservoir, priority valve of the hydraulic pump, proportional valve assembly, and motor

See your John Deere dealer.

Check valve stuck open in the hydraulic load sense line

See your John Deere dealer.

Strainer shutoff valve closed

Open valve.

Flowmeter shutoff valve closed

Open valve.

Operate engine at 2550 rpm.

Nozzle tips worn

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

Clogged solution pump impeller

Separate pump housing. Remove and clean the impeller.

Suction line partially blocked or collapsed

Clean, repair, or replace suction line as necessary.

Air leak in the suction line

Repair or replace suction line.

SprayStar™ not properly programmed

Set up SprayStar™. (See SprayStar™ System Section for proper setup procedure.)

Pressure line leaking

Repair or replace pressure line as necessary.

Low hydrostatic/hydraulic oil level

Fill up the reservoir to the specified level. Check the system for leaks.

Faulty pressure sensor

See your John Deere dealer.

Faulty shaft between the solution pump and hydraulic motor

See your John Deere dealer.

Solution pump shaft seals leaking

See your John Deere dealer.

Faulty proportional valve

See your John Deere dealer.

Faulty hydraulic pump

See your John Deere dealer.

Faulty hydraulic shuttle valve

See your John Deere dealer.

Faulty hoses between reservoir, priority valve of the hydraulic pump, proportional valve assembly, and motor

See your John Deere dealer.

Missing bleed valve orifice

See your John Deere dealer.

Check valve stuck open in the hydraulic load sense line

See your John Deere dealer.

Clean strainers.

Clogged spray nozzles

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

Clogged or partially clogged supply hoses of the spray boom

Clean hoses.

SprayStar™ not properly programmed

Set up SprayStar™. (See SprayStar™ System Section for proper setup procedure.)

High/low flow valve in wrong position

Turn high/low valve to correct position. (See Apply with Low Application Rates in SprayStar™ System Section.)

Minimum pressure set too high

Lower minimum pressure setting.

Dirty or faulty flowmeter

Clean with brake cleaner daily.

Faulty spray boom shutoff valves

See your John Deere dealer.

Faulty pressure sensor

See your John Deere dealer.

Faulty proportional valve assembly

See your John Deere dealer.

Determine minimum pressure required and enter into SprayStar™. (See Set 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 Apply with Low Application Rates in SprayStar™ System Section.)

Solution contains heavy solids (poor mixture)

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

Clogged spray nozzles

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

Dirty or stuck flowmeter

Clean flowmeter with brake cleaner.

Incorrect sprayer response min/max value in control unit adjust

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

Spray boom charge not on when it should be

Set spray booms charge correctly.

Collapsed or clogged spray boom supply hoses

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

Faulty spray boom shutoff valves

See your John Deere dealer.

Faulty pressure sensor

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 Set 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 Apply with Low Application Rates in SprayStar™ System Section.)

Solution contains heavy solids (poor mixture)

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

Clogged spray nozzles

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

Dirty or stuck flowmeter

Clean flowmeter with brake cleaner.

Incorrect sprayer response min/max valve in control unit adjust.

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

Spray boom charge not on when it should be.

Set spray booms to charge correctly.

Clogged or collapsed solution hoses of the spray booms

Remove and inspect the spray boom solution hoses. Clean or replace as necessary.

Faulty spray boom section shutoff valves

Repair or replace spray boom section shutoff valves.

Faulty pressure sensor

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.

Clogged spray boom supply and bleed line or faulty check valve

Clean or replace line or check valve.

Calibrate pressure sensor (See SprayStar™ System Section.)

Faulty proportional valve assembly

See your John Deere dealer.

Tighten connection and/or apply sealant

See your John Deere dealer.

Faulty solution pump

See your John Deere dealer.

Hydraulic standby pressure set too low

Set standby pressure to 1724 kPa (17.2 bar) (250 psi) or 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 in SprayStar™ System Section.)

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 the radar electrical connector when radar is disconnected

Install jumper wire.

Wheel speed calibration or radar calibration in SprayStar™ incorrectly set.

Calibrate wheel speed sensor. (See Calibrating Wheel Speed Sensor in SprayStar™ System Section.)

Faulty radar or wheel speed sensor

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.

Clogged or dirty flowmeter

Clean flowmeter.

Corroded flowmeter connector pins

Clean connector.

Damaged flowmeter wiring harness

Repair or replace wiring harness.

Flowmeter installed backwards.

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

Faulty speed sensor

See speed Indicates 0 in this section.

Spray not discharging from nozzles.

Refer to No Discharge From Nozzles symptom in this group.

Faulty flowmeter

See your John Deere dealer.

Spray 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.)

Clogged, or dirty flowmeter

Disassemble, clean, and assemble the flowmeter.

Corroded flowmeter connector pins

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 the suction side of pump

Repair air leak.

Flowmeter sensor not properly aligned

Align sensor properly. (See Clean Flowmeter in Service—As Required Section.)

Faulty flowmeter

See your John Deere dealer.

Faulty speed sensor

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 valves 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 the SprayStar™ boom setup

Enter proper data for boom setup. (See Spray Setup in SprayStar™ System Section.)

Minimum pressure too high, causing over application

Decrease minimum pressure setting in SprayStar™ display. (See Set 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 the 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 valves to second flowmeter open

Close valve to second flowmeter.

Mix chemicals properly. (See the chemical label.)

Close agitation valves close 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.

Clogged agitation nozzles

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.

Clogged fill strainer

Clean fill strainer.

Pump priming procedure incorrect

Prime solution pump correctly. (See Prime Solution Pump with Rinse Tank Water in the Solution System Section.)

Pump bleed line kinked or forms a trap

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

Clogged pump bleed line

Clean or blow out pump bleed line.

Nurse tank hose does not have shutoff valve or has valve on the end of the hose

Install shutoff valve on the end of the nurse tank hose.

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