
Diagnostic Trouble Codes
When either a Service Alert or Information
indicator is displayed it is suggested the tractor
be placed in park or engine shut off. Restart
the engine to verify if the active Diagnostic
Trouble Code reappears before contacting
your John Deere dealer. Sometimes, the code
can be corrected by resetting the
communication messages when tractor is
restarted.
Some Service Alerts and Information
indicators can be acknowledged and display
cleared by pressing the select switch on the
CommandCenter. The display will return to a
normal mode allowing tractor function to
continue. However, diagnostic trouble code
may reappear at a later date if condition still
exists. For an explanation of STOP, Service
Alert, Information Indicators and Diagnostics
Trouble Codes refer to section 15 in this
document.
OU1092A,0000020 -19-28SEP06-1/27
Solution
Armrest Control Unit Diagnostic Trouble Codes (ACU)
ACU Switched Supply Voltage Low. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Have John
Deere dealer repair as soon as possible.
Transmission Oil
Temperature Low
Engine Speed Limited Due to Cold Oil. Slow engine
speed to less than 1500 rpm until hydraulic oil temp
is above -5 °C (23 °F).
Transmission Not Responding to Command. Have
John Deere dealer repair as soon as possible.
ACU
000974.02
ACU
000974.03
Hand Throttle Circuit Voltage Problem. Have John
Deere dealer repair at earliest convenience.

Rear PTO Circuit Voltage Problem. Have John Deere
dealer repair at earliest convenience.
ACU
001079.02
ACU
001079.03
ACU
001079.04
ACU Sensor Supply 1 Voltage Problem. Have John
Deere dealer repair as soon as possible.
ACU
001080.02
ACU
001080.03
ACU
001080.04
ACU Sensor Supply 2 Voltage Problem. Have John
Deere dealer repair as soon as possible.
ECU Message Missing. Check fuse F24. Have John
Deere dealer repair as soon as possible.
PTI or PTP Message Missing. Have John Deere
dealer repair as soon as possible.
SFA Message Missing. Have John Deere dealer
repair as soon as possible.
CAB Message Missing. Check fuse F22. Have John
Deere dealer repair as soon as possible.
Single Lever Control (If Equipped) - Hand Presence
Switch Problem. Move hand to show operator is in
place. If code still exists, have John Deere dealer
repair at earliest convenience.
ACU
523776.02
ACU
523801.02
ACU
523804.02
ACU
523804.03
ACU
523804.04
ACU
523805.02
ACU
523805.03
Single Lever Control Problem. To keep working, use
SCV III and IV controls. Go to CommandCenter and
disable single lever control. Have John Deere dealer
repair at earliest convenience.

ACU
523923.02
ACU
523923.03
ACU
523923.04
SCV I Control Lever Switch/Sensor Problem. Have
John Deere dealer repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-2/27
ACU
523953.02
ACU
523953.03
ACU
523953.04
Speed Control Lever Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Set Speed Adjuster Problem. Have John Deere dealer
repair at earliest convenience.
Engine Load to High in Manual Mode. Reduce load
and/or ballast. If code returns, have John Deere dealer
repair at earliest convenience.
ACU
523960.17
ACU
523960.31
Operator Not Seated or Faulty Sensor. Check and
repair if needed.
Park Engaged While in Gear. Restart tractor, operate
tractor in forward gear. If code returns, have John
Deere dealer repair at earliest convenience.
Park Lock Engagement Problem. Restart tractor.
Operate vehicle slowly in forward gear. If code
returns, have John Deere dealer repair at earliest
convenience.

MFWD Speed Incorrect. Is a function of traction
control. Very important if pulling trailers. Have John
Deere dealer repair at earliest convenience.
Transmission Come
Home Mode
Have John Deere dealer repair as soon as possible.
ACU
523970.02
ACU
523970.03
ACU
523970.04
Front Hitch Circuit Problem. Have John Deere dealer
repair at earliest convenience.
Transmission In Gear At Start-Up. Restart vehicle
with transmission in park. If code returns, have John
Deere dealer repair at earliest convenience.
ACU
524014.31
ACU
524017.13
ACU
524017.31
ACU
524018.31
ACU
524019.31
Left-Hand Reverser Problem. Have John Deere
dealer repair at earliest convenience.
Multiple Reverser Switches Conflict. Have John
Deere dealer repair at earliest convenience.
ACU
524022.31
ACU
524023.31
ACU
524024.31
ACU
524025.31
ACU
524026.31
ACU
524027.31
ACU
524030.31
ACU
524031.31
ACU
Left-Hand Reverser Circuit Problem. Have John
Deere dealer repair at earliest convenience.

524032.31
ACU
524034.31
ACU
524036.31
Front Hitch Valve Control Lever Switch/Sensor
Circuit Conflict. Have John Deere dealer repair at
earliest convenience.
OU1092A,0000020 -19-28SEP06-3/27
ACU
524101.03
ACU
524101.04
Front Hitch Valve Control Lever Sensor Circuit
Voltage Problem. Have John Deere dealer repair at
earliest convenience.
SCV Control Lever Switch/Sensor Circuit Conflict.
Have John Deere dealer repair at earliest
convenience.
ACU
524102.03
ACU
524102.04
SCV Control Lever Sensor Circuit Voltage Problem.
Have John Deere dealer repair at earliest
convenience.
ACU
524103.02
ACU
524103.03
ACU
524103.04
ACU
524104.02
ACU
524104.03
ACU
524104.04
ACU
524105.02
ACU
524105.03
SCV Control Lever Circuit Problem. Have John
Deere dealer repair at earliest convenience.

ACU
524212.02
ACU
524212.03
ACU
524212.04
Rear Hitch Control Lever Circuit Problem. Have
John Deere dealer repair at earliest convenience.
ACU
524224.02
ACU
524224.14
Rear PTO Switch Circuit Problem. Have John Deere
dealer repair at earliest convenience.
Transmission Relay Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Transmission Enable Relay Circuit Fault. Have John
Deere dealer repair at earliest convenience.
ActiveSeat Unit Diagnostic Trouble Codes (ASU)
Seat Pressure Control Solenoid Problem. Have John
Deere dealer repair at earliest convenience.
ASU Not Calibrated. Have John Deere dealer repair
as soon as possible.
ClimaTrak Display Codes (ATC) - If Equipped
IMPORTANT: Check the cleanliness of the condenser at the front of the tractor and
make sure the cab recirculation air filter is not plugged for all ATC diagnostic trouble
codes. If the codes return, contact your John Deere dealer as soon as possible.
Front Brake Control Unit Diagnostic Trouble Codes (BRC)
BRC
000158.04
BRC
000168.04
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
BRC
000629.12
BRC
000630.13
BRC Control Unit Problem. Have John Deere dealer
repair as soon as possible.

OU1092A,0000020 -19-28SEP06-4/27
BRC
001079.03
BRC
001079.04
BRC
001079.05
BRC
001079.06
Sensor Supply Voltage Problem. Have John Deere
dealer repair as soon as possible.
Secondary Brake Pressure High. Have John Deere
dealer repair as soon as possible.
Secondary Brake Pressure Low. Have John Deere
dealer repair as soon as possible.
Control Unit Attached to Incompatible Harness. Have
John Deere dealer repair as soon as possible.
BRC
523837.00
BRC
523837.03
BRC
523837.04
BRC
523837.13
Rear Brake Pressure Circuit Problem. Have John
Deere dealer repair as soon as possible.
BRC
523840.00
BRC
523840.01
BRC
523840.03
BRC
523840.04
BRC
523840.13
Front Brake Pressure Circuit Problem. Have John
Deere dealer repair as soon as possible.
BRC
523844.05
BRC
523844.06
Front Brake Solenoid Circuit Problem. Have John
Deere dealer repair as soon as possible.

Control Unit Problem. Have John Deere dealer repair
as soon as possible.
Switched Supply Voltage Problem. Check Fuse F24.
Restart vehicle. If code returns, have John Deere
Dealer repair as soon as possible.
Right Brake Pedal Switch Problem. Have John Deere
dealer repair as soon as possible.
BRC
524162.19
BRC
524169.19
Left Brake Pedal Switch Problem. Have John Deere
dealer repair as soon as possible.
Cab Control Unit Diagnostic Trouble Codes (CAB)
CAB
000091.02
CAB
000091.03
CAB
000091.04
Foot Throttle Sensor Problem. Have John Deere
dealer repair at earliest convenience.
CAB
001079.02
CAB
001079.03
CAB
001079.04
CAB Supply Voltage Problem. Have John Deere
dealer repair as soon as possible.
Seat Switch Circuit Problem. Have John Deere dealer
repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-5/27
Turn Signal Switch Problem. Have John Deere dealer
repair at earliest convenience.

Rear PTO Remote Switch Problem. Have John Deere
dealer repair at earliest convenience.
Secondary Hand Brake on While Moving. Disengage
hand brake. If code returns, have John Deere dealer
repair as soon as possible.
Left-Hand Reverser Circuit Problem. Have John
Deere dealer repair at earliest convenience.
CAB Switched Power Voltage Problem. Check fuse
F15. Restart vehicle. If code returns, have John Deere
dealer repair returns at earliest convenience.
Left-Hand Reverser Lever Type Not Selected. Have
John Deere dealer repair at earliest convenience.
Left-Hand Reverser Power Circuit Fault. Have John
Deere dealer repair at earliest convenience.
CAB
524018.31
CAB
524019.31
Left-Hand Reverser Transition Fault. Lever is held in
an invalid position. Move lever to PARK. Have John
Deere dealer repair at earliest convenience.
Left-Hand Reverser in Gear at Power Up. Place
reverser lever in PARK position. Restart vehicle. If
code returns, have John Deere dealer repair at earliest
convenience.
CAB
524021.31
CAB
524022.31
CAB
524023.31
CAB
524024.31
CAB
524025.31
CAB
524026.31
CAB
524027.31
Left-Hand Reverser Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Left-Hand Reverser Circuit Problem. Have John
Deere dealer repair at earliest convenience.

CAB
524031.31
CAB
524032.31
CAB
524034.31
CAB
524036.31
CAB
524166.02
CAB
524166.03
CAB
524166.04
CAB
524166.13
CAB
524166.30
Right Brake Pedal Circuit Problem. Have John Deere
dealer repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-6/27
CAB
524169.02
CAB
524169.03
CAB
524169.04
CAB
524169.13
CAB
524169.30
Left Brake Pedal Circuit Problem. Have John Deere
dealer repair at earliest convenience.
CAB
524173.02
CAB
524173.03
CAB
524173.04
Clutch Pedal Sensor Circuit Conflict. Have John
Deere dealer repair at earliest convenience.
Central Control Unit Diagnostic Trouble Codes (CCU)

CCU
000090.03
CCU
000090.04
Rear PTO Oil Temperature Circuit Problem. Have
John Deere dealer repair at earliest convenience.
Fuel Level Circuit Problem. Turn key switch to RUN
position (engine off). Check fuel level. If code
returns, have John Deere dealer repair at earliest
convenience.
Turn key switch to RUN position (engine off). Check
fuel level. If code returns have John Deere dealer
repair at earliest convenience.
Engine Air Filter
Restricted
Clean or replace engine air filter.
CCU
000107.03
CCU
000107.04
Engine Air Filter Restriction Sensor Voltage
Problem. Have John Deere dealer repair at earliest
convenience.
Engine Air Filter
Restricted
Engine Air Filter Becoming Restricted. Clean or
replace engine air filter.
Engine Air Filter
Restricted
Engine Air Filter Restricted, Power Derated. Clean or
replace engine air filter.
Rear Differential Lock Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Rear PTO Sensor Voltage Problem. Have John Deere
dealer repair at earliest convenience.
CCU
001079.03
CCU
001079.04
CCU Sensor Supply Voltage Problem. Have John
Deere dealer repair at earliest convenience.
This code will generate when vehicle is started and
air brake pressure is insufficient to disengage trailer
brakes. It may be necessary to wait over 1 minute for
brakes to release. Bleed excess moisture from air
brake reservoir. If code returns, have John Deere
dealer repair as soon as possible.

Hydraulic Oil
Temperature High
Check hydraulic oil level in sight glass on rear
differential. Inspect transmission/hydraulic oil cooler.
If code returns, have John Deere dealer repair
immediately.
CCU
001638.03
CCU
001638.04
Hydraulic Oil Temperature Circuit Problem. Have
John Deere dealer repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-7/27
Hydraulic Oil
Temperature High
Check hydraulic oil level in sight glass on rear
differential. Inspect transmission-hydraulic oil cooler.
Restart vehicle. Operate vehicle at rated speed for 1 2 minutes. If code returns, have John Deere dealer
repair as soon as possible.
Hydraulic Oil Filter
Restricted
Check and/or replace hydraulic oil filter. Restart
vehicle. Operate vehicle at rated speed for 1 - 2
minutes. If code returns, have John Deere dealer
repair as soon as possible.
Rear PTO Shaft Turning Too Fast. Check that PTO
shaft and PTO speed lever match. Restart vehicle. If
code returns, have John Deere Dealer repair at
earliest convenience.
Rear PTO Underspeed. Check that PTO shaft and
PTO speed lever match. Have John Deere dealer
repair if code returns at earliest convenience.
Rear PTO Calibration not Performed or Incomplete.
Have John Deere dealer repair as soon as possible.
Back Up Alarm Circuit Fault. Have John Deere
dealer repair as soon as possible.
Implement Management
System
IMS Aborted Sequence Because of Lack of Response
from Hitch/SCV Control Unit. Have John Deere
dealer repair at earliest convenience.

CCU Switched Supply Voltage Low. Have John
Deere dealer repair at earliest convenience.
Leaving Differential Lock on for more than 15
seconds will generate this code. Have John Deere
dealer repair at earliest convenience.
PTO is Disabled but the Switch is on. Turn all PTO
switches OFF. Restart vehicle. If code returns, have
John Deere dealer repair at earliest convenience.
MFWD Circuit Problem. Have John Deere dealer
repair at earliest convenience.
Implement Management
System
IMS was turned off while commanding an MFWD
mode other than what the MFWD switch has
commanded. Have John Deere dealer repair at
earliest convenience.
PTO Engaged while Operator not Present. Have John
Deere dealer repair as soon as possible.
Rear PTO Solenoid Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Rear PTO Remote Enable Switch ON and Rear PTO
Fender Switch OFF. This is normal and serves as a
safety alert.
Cab Load Center (CLC) Diagnostic Trouble Codes
OU1092A,0000020 -19-28SEP06-8/27
CAB Switched Supply Voltage Problem. Have John
Deere dealer repair as soon as possible.

000158.01
CLC
000158.17
CLC
000158.18
CLC Circuit Current High. Remove all operator
customized accessories such as flood lights, hazard
lights and window wipers. Have John Deere dealer
repair at earliest convenience.
CLC
002360.05
CLC
002360.06
Rear Fender Flood Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002362.05
CLC
002362.06
Rear Roof Flood Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002364.05
CLC
002364.06
Mid Body Flood Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002366.05
CLC
002366.06
Side Roof Flood Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002368.05
CLC
002368.06
Left Turn Signal Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002370.05
CLC
002370.06
Right Turn Signal Light Circuit Current Problem.
Check condition of light bulb. If code still exists,
have John Deere dealer repair at earliest convenience.
CLC
002372.05
CLC
002372.06
Brake Light Circuit Current Problem. Check
condition of light bulb. If code still exists, have John
Deere dealer repair at earliest convenience.

CLC
002378.05
CLC
002378.06
Tail Light Circuit Current Problem. Check condition
of light bulb. If code still exists, have John Deere
dealer repair at earliest convenience.
CLC
002394.05
CLC
002394.06
Trailer Flood Light Circuit Overload or Short Circuit.
Unplug 7-pin connector to verify code still exists.
Have John Deere dealer repair at earliest
convenience.
Front Wiper Switch Circuit Fault. Cycle switch ON
and OFF. If code still exists, have John Deere dealer
repair at earliest convenience.
Rear Wiper Switch Circuit Fault. Cycle switch ON
and OFF. If code still exists, have John Deere dealer
repair at earliest convenience.
Main Light Switch Circuit Fault. Cycle switch ON
and OFF. If code still exists, have John Deere dealer
repair at earliest convenience.
ELX Output Circuit Current High. Have John Deere
dealer repair at earliest convenience.
CLC
522433.05
CLC
522433.06
Rear Wiper Motor Circuit Current Problem. Have
John Deere dealer repair at earliest convenience.
CLC
522434.05
CLC
522434.06
Front Wiper Motor Low Speed Circuit Current
Problem. Have John Deere dealer repair at earliest
convenience.
OU1092A,0000020 -19-28SEP06-9/27
CLC
522435.05
CLC
522435.06
Front Wiper Motor High Speed Circuit Current
Problem. Have John Deere dealer repair at earliest
convenience.

PTO Remote Enable Switch Problem. Have John
Deere dealer repair at earliest convenience.
Communication Bus or Vehicle Load Center Wakeup
Circuit Current High. Have John Deere dealer repair
at earliest convenience.
Transmission Selector Circuit Fault. Have John Deere
dealer repair at earliest convenience.
Auto Mode and Brake Assist Mode High. Have John
Deere dealer repair at earliest convenience.
Engine Control Unit Diagnostic Trouble Codes (ECU)
ECU
000097.03
ECU
000097.04
Water In Fuel Signal Problem. Have John Deere
dealer repair as soon as possible.
Engine Water Separator
Full
Remove water from separator.
Check engine oil level. If code returns, have John
Deere dealer repair immediately.
ECU
000100.03
ECU
000100.04
Engine Oil Pressure Input Voltage Problem. Have
John Deere dealer repair as soon as possible.
Check engine oil level. If code returns, have John
Deere dealer repair as soon as possible.
Sensor Indicates Oil Pressure When Engine Is OFF.
Have John Deere dealer repair at earliest
convenience.
Manifold Air Pressure Sensor Problem. Have John
Deere dealer repair at earliest convenience.
ECU
000102.03
ECU
000102.04
Manifold Air Pressure Voltage Problem. Have John
Deere dealer repair as soon as possible.

Turbo Speed Overspeed. If operating at high altitude,
reduce load on engine. If problem continues, have
John Deere dealer repair as soon as possible.
ECU
000103.05
ECU
000103.06
ECU
000103.08
ECU
000103.31
Turbo Speed Error. Have John Deere dealer repair as
soon as possible.
Engine Air Temperature
High
Intake Air Temperature High. Check coolant level.
Inspect and clean radiator. If code returns, have John
Deere dealer repair immediately.
ECU
000105.03
ECU
000105.04
Manifold Air Temperature Voltage Problem. Have
John Deere dealer repair as soon as possible.
Engine Air Temperature
High
Manifold Air Temperature is above Specification.
Check coolant level. Inspect and clean radiator. If
code returns, have John Deere dealer repair as soon
as possible.
OU1092A,0000020 -19-28SEP06-10/27
Engine Air Temperature
High
Manifold Air Temperature Moderately High. Check
coolant level. Inspect and clean radiator. If code
returns, have John Deere dealer repair as soon as
possible.
Barometric Pressure Sensor Problem. Have John
Deere dealer repair at earliest convenience.
Engine Coolant
Temperature High
Check coolant level. Inspect and clean radiator. If
code returns, have John Deere dealer repair
immediately.

ECU
000110.03
ECU
000110.04
Engine Coolant Temperature Input Voltage Problem.
Have John Deere dealer repair as soon as possible.
Engine Coolant
Temperature High
Check coolant level. Inspect and clean radiator. If
code returns, have John Deere dealer repair at earliest
convenience.
Engine Coolant
Temperature High
Check coolant level. Inspect and clean radiator. If
code returns, have John Deere dealer repair as soon
as possible.
Engine Coolant
Temperature Low
Engine Coolant Temperature Low. Warm up engine.
If problem continues, have John Deere dealer repair
as soon as possible.
ECU
000157.03
ECU
000157.04
Fuel Rail Pressure Input Voltage Problem. Have John
Deere dealer repair immediately.
Fuel Rail Pressure Loss Detected. Have John Deere
dealer repair as soon as possible.
Fuel Rail Pressure Not Developed. Have John Deere
dealer repair as soon as possible.
Engine Control Unit Power Down Error. Have John
Deere dealer repair at earliest convenience.
Fuel Temperature High. Check coolant level. Inspect
and clean radiator. Check to see if code returns. Have
John Deere dealer repair immediately.
ECU
000174.03
ECU
000174.04
Fuel Temperature Input Voltage Problem. Have John
Deere dealer repair as soon as possible.
Check coolant level. Inspect and clean radiator and
fuel cooler. If code returns, have John Deere dealer
repair as soon as possible.

Result of downshifting, throttle back. If code returns,
have John Deere dealer repair immediately.
ECU
000237.02
ECU
000237.13
ECU
000237.31
Vehicle Serial Number Invalid. Have John Deere
dealer repair as soon as possible.
EGR Temperature Sensor Input Voltage Problem.
Most Sever Level. Have John Deere dealer repair
immediately.
OU1092A,0000020 -19-28SEP06-11/27
ECU
000412.03
ECU
000412.04
EGR Temperature Sensor Input Voltage Problem.
Have John Deere dealer repair as soon as possible.
ECU
000412.15
ECU
000412.16
EGR Temperature Higher than Expected. Have John
Deere dealer repair as soon as possible.
ECU
000611.03
ECU
000611.04
Electronic Injector Wiring Problem. Have John Deere
dealer repair as soon as possible.
Electronic Injector Supply Voltage Problem. Have
John Deere dealer repair as soon as possible.
ECU Memory Problem. Have John Deere dealer
repair as soon as possible.
ECU Programming Error. Have John Deere dealer
repair immediately.

Cam Sensor Open. Have John Deere dealer repair as
soon as possible.
Cam Sensor Shorted. Have John Deere dealer repair
as soon as possible.
ECU
000636.02
ECU
000636.08
ECU
000636.10
Pump Position Sensor Problem. Have John Deere
dealer repair at earliest convenience.
ECU
000637.02
ECU
000637.05
ECU
000637.06
ECU
000637.07
Crank Position Sensor Problem. Have John Deere
dealer repair as soon as possible.
ECU
000637.08
ECU
000637.10
Crank Position Input Problem. Have John Deere
dealer repair as soon as possible.
Turbo Actuator Supply Voltage Low or Intermittent.
Have John Deere dealer repair as soon as possible.
ECU
000641.05
ECU
000641.13
Have John Deere dealer repair as soon as possible.
Communication on Error to Turbo. Have John Deere
dealer repair as soon as possible.
Turbo Actuator Over Temperature. Have John Deere
dealer repair as soon as possible.
Upper Fan Drive Output 1 Shorted or Open. Inspect
wiring leads on solenoid coil above fan drive piston
housing. Have John Deere dealer repair as soon as
possible.

ECU
000651.02
ECU
000651.13
Electronic Fuel Injector Problem. Have John Deere
dealer repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-12/27
ECU
000651.05
ECU
000651.06
ECU
000651.07
ECU
000652.02
ECU
000652.05
ECU
000652.06
ECU
000652.07
ECU
000652.13
ECU
000653.02
ECU
000653.05
ECU
000653.06
ECU
000653.07
ECU
000653.13
ECU
000654.02
ECU
000654.05
ECU
000654.06
ECU
000654.07
ECU
000654.13
ECU
Electronic Fuel Injector Problem. Have John Deere
dealer repair as soon as possible.

000655.02
ECU
000655.05
ECU
000655.06
ECU
000655.07
ECU
000655.13
ECU
000656.02
ECU
000656.05
ECU
000656.06
ECU
000656.07
ECU
000656.13
ECU
000676.03
ECU
000676.05
Glow Plug Relay Output Problem. Have John Deere
dealer repair as soon as possible.
Electric Lift Pump in Fuel Filter Base Short/Open.
Have John Deere dealer repair at earliest
convenience.
Engine Protection Shutdown. Have John Deere dealer
repair as soon as possible.
ECU Temperature High. Check area around ECU for
adequate air flow. If problem continues, have John
Deere dealer repair immediately.
Internal ECU Temperature High. Check area around
ECU for adequate air flow. If problem continues,
have John Deere dealer repair as soon as possible.
ECU
001172.03
ECU
001172.04
Compressor Inlet Temperature Input Voltage
Problem. Have John Deere dealer repair at earliest
convenience.
Exhaust Temperature is High. Have John Deere
dealer repair immediately.

Exhaust Temperature is Higher than Specification.
Have John Deere dealer repair as soon as possible.
OU1092A,0000020 -19-28SEP06-13/27
ECU
001347.03
ECU
001347.05
Pump control valve problem. Have John Deere dealer
repair as soon as possible.
Fuel Rail Pressure Control Problem. Check fuel filter,
If code returns, have John Deere dealer repair as soon
as possible.
One of the Derate Conditions Exists on Engine. Have
John Deere dealer repair at earliest convenience.
ECU
001639.01
ECU
001639.16
ECU
001639.18
ECU
002005.09
Fan Speed Signal Problem. Have John Deere dealer
repair at earliest convenience.
Communication Error. Allow tractor to run for 10
minutes to clear code.
CAB Message Missing. Have John Deere dealer
repair at earliest convenience.
ECU
002049.09
ECU
002071.09
Control Unit Signal Missing. Have John Deere dealer
repair at earliest convenience.
Charge Air Outlet Temperature Higher than Expected
(Most Severe). Have John Deere dealer repair
immediately.

ECU
002630.03
ECU
002630.04
Charge Air Outlet Temperature Input Voltage
Problem. Have John Deere dealer repair as soon as
possible.
ECU
002630.15
ECU
002630.16
Charge Air Outlet Temperature Higher than Expected
(Less Severe). Have John Deere dealer repair as soon
as possible.
ECU
002659.02
ECU
002659.15
ECU
002659.17
EGR Problem. Have John Deere dealer repair as soon
as possible.
Compressor Outlet Temperature High. Have John
Deere dealer repair as soon as possible.
ECU
002791.02
ECU
002791.03
ECU
002791.04
ECU
002791.07
ECU
002791.13
ECU
002791.14
ECU
002791.31
EGR Valve Error. Have John Deere dealer repair as
soon as possible.
ECU
002795.07
ECU
002795.12
Variable Geometry Turbo Control Error. Have John
Deere dealer repair as soon as possible.
ECU
003509.03
ECU
003509.04
Fuel Rail Pressure Sensor Supply Voltage Problem.
Have John Deere dealer repair immediately.

OU1092A,0000020 -19-28SEP06-14/27
ECU
003510.03
ECU
003510.04
ECU
003511.03
ECU
003511.04
ECU
003512.03
ECU
003512.04
ECU
003513.03
ECU
003513.04
ECU Sensor Voltage Problem. Have John Deere
dealer repair as soon as possible.
ECU Default DTC. Have John Deere dealer repair at
earliest convenience.
Hitch Control Unit Diagnostic Trouble Codes (HCU)
HCU
000158.04
HCU
000168.04
HCU Supply Voltage Low. Visually inspect around
the batteries and alternator for any visual signs of
damage or accumulated debris. Check fuse F30. If
code still exists, have John Deere dealer repair at
earliest convenience.
HCU Not Calibrated. Have John Deere dealer repair
at earliest convenience.
HCU
001079.03
HCU
001079.04
HCU Sensor Supply Voltage Problem. Have John
Deere dealer repair at earliest convenience.
HCU
001873.02
HCU
001873.03
HCU
001873.04
HCU
001873.11
Rear Hitch Position Sensor Problem. Have John
Deere dealer repair at earliest convenience.

HCU Calibration Fault/Rear Hitch Position Sensor
Circuit. Have John Deere dealer calibrate hitch at
earliest convenience.
HCU
001881.03
HCU
001881.04
HCU
001881.13
Rear Hitch Draft Sensor Problem. Have John Deere
dealer repair at earliest convenience.
Vehicle Speed Update Fault. Have John Deere dealer
repair at earliest convenience.
ACU Message Missing. Have John Deere dealer
repair at earliest convenience.
CCU Message Missing. Have John Deere dealer
repair at earliest convenience.
HCU
521001.02
HCU
521001.05
HCU
521001.06
HCU
521001.07
HCU
521001.11
HCU
521002.05
HCU
521002.07
HCU
521002.06
Rear Hitch Circuit Problem. Have John Deere dealer
repair at earliest convenience.
Wire Connector Fault. Have John Deere dealer repair
at earliest convenience.
OU1092A,0000020 -19-28SEP06-15/27

Hydraulic Option Configuration Problem. Hook up
last used implement and cycle key switch ON and
OFF to reset.
Control Unit Problem. Have John Deere dealer repair
at earliest convenience.
Operator Trying to use Hitch while Disabled or not
Available. Have John Deere dealer repair at earliest
convenience.
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
HCU
524212.19
HCU
524212.31
Rear Hitch Control Lever Problem. Have John Deere
dealer repair at earliest convenience.
Instrument Control Unit Diagnostic Trouble Codes (ICU)
ECU Message Missing. Check fuse F9. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
PTI or PTQ Message Missing. Check fuse F6 for IVT
or F35 PowrQuad Plus. Restart vehicle. If code
returns, have John Deere dealer repair as soon as
possible.
BRC Message Missing. Have John Deere dealer
repair at earliest convenience.
ACU Message Missing. Check fuse F13 for IVT or
F35 for PowrQuad Plus. Restart vehicle. If code
returns, have John Deere dealer repair as soon as
possible.
SSU Message Missing. Have John Deere dealer
repair at earliest convenience.
SFA Message Missing. Check fuse F24. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.

ATC Message Missing. Check fuse F42. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
VLC Message Missing. Have John Deere dealer
repair as soon as possible.
SCU Message Missing. Check fuse F24. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
HCU Message Missing. Have John Deere dealer
repair as soon as possible.
PTF Message Missing. Check fuse F15. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
CAB Message Missing. Check fuse F35. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
CLC Message Missing. Have John Deere dealer
repair as soon as possible.
OU1092A,0000020 -19-28SEP06-16/27
ASU Message Missing. Check fuses F35 for IVT and
F45 PowrQuad Plus. Restart vehicle. If code returns,
have John Deere dealer repair as soon as possible.
CCU Message Missing. Check fuses F6 for IVT and
F35 for PowrQuad Plus. Restart vehicle. If code
returns, have John Deere dealer repair as soon as
possible.
ICU Message Missing. Check fuse F28. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.

SCO Message Missing. Check fuse F24. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
SUP Message Missing. Check fuse F23. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
TEC Message Missing. Check fuse F23. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
No CAN messages received from any source address
within time-out period.
Engine is Currently too Cold to Start and is Firing the
Glow Plugs in Preparation for Starting. Engine may
be safely started at conclusion of countdown.
Front PTO Control Unit Diagnostic Trouble Codes (PTF)
PTF Supply Voltage Low. Have John Deere dealer
repair at earliest convenience.
Front PTO Shaft is Turning too Fast. Restart vehicle.
Engage Front PTO. Set engine to full throttle. If code
returns, have John Deere dealer repair as soon as
possible.
Front PTO Underspeed Detected. Restart vehicle and
Engage Front PTO. Set engine to full throttle. If code
returns, have John Deere dealer repair at earliest
convenience.
Front PTO Not Calibrated. Have John Deere dealer
repair at earliest convenience.
PTO Engaged While Operator Not Seated. Sit in
operators seat. Restart vehicle and cycle front PTO
switch. If code returns, have John Deere dealer repair
as soon as possible.
Front PTO Circuit Problem. Have John Deere dealer
repair at earliest convenience.
Front PTO Oil Temperature Circuit Problem. Have
John Deere dealer repair at earliest convenience.

Control Unit Problem. Check fuse F35. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
PTF
524216.02
PTF
524216.31
Front PTO Switch Problem. Have John Deere dealer
repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-17/27
Solution
IVT Transmission Control Unit Diagnostic Trouble Codes (PTI)
PTI
000126.15
PTI
000126.16
Transmission Oil Filter
Restricted
Check condition and service interval of transmission
oil and filter. Restart vehicle. Warm oil to normal
operating temperature. If code returns, have John
Deere dealer repair as soon as possible.
Transmission Oil
Pressure Low
Restart vehicle. Warm oil to normal operating
temperature. If code returns, have John Deere dealer
repair at earliest convenience.
PTI
000127.02
PTI
000127.04
Transmission Pump Pressure Sensor Problem. Have
John Deere dealer repair at earliest convenience.
Transmission Oil
Pressure Low
Transmission Pump Pressure Low. Have John Deere
dealer repair as soon as possible.
PTI
000158.01
PTI
000168.01
Control Unit Supply Voltage Problem. Have John
Deere dealer repair at earliest convenience.
Engine Overspeed. Reduce engine RPM. If code
returns, have John Deere dealer repair as soon as
possible.

Engine Speed Mismatch. Have John Deere dealer
repair at earliest convenience.
Operating tractor downhill with a heavy rear load
may cause the rear differential to overspeed the
transmission output shaft. Slow vehicle. If code
returns, have John Deere dealer repair as soon as
possible.
Transmission Speed Sensors and Calculated
"Expected" Speed Differ by more than 200 rpm.
Have John Deere dealer repair at earliest
convenience.
Park Brake Solenoid Circuit Problem. Have John
Deere dealer repair at earliest convenience.
PTI
000734.05
PTI
000735.05
PTI
000736.05
Clutch/Brake Solenoid Circuit Problem. Have John
Deere dealer repair at earliest convenience.
PTI
000754.18
PTI
000755.18
PTI
000756.18
Transmission Oil
Pressure Low
Clutch Enable Pressure Problem. Have John Deere
dealer repair as soon as possible.
Control Unit Sensor Voltage Problem. Have John
Deere dealer repair at earliest convenience.
ECU Message Missing. Have John Deere dealer
repair at earliest convenience.
ACU Message Missing. Have John Deere dealer
repair at earliest convenience.
Transmission Oil Filter
Restricted
Check the condition and service interval of the
transmission oil and filter. If code returns, have John
Deere dealer repair immediately.

OU1092A,0000020 -19-28SEP06-18/27
PTI
524042.16
PTI
524227.00
PTI
524227.16
Transmission Oil Filter
Restricted
Transmission Oil Filter Bypassed. Check the
condition and service interval of the transmission oil
and filter. If code returns, have John Deere dealer
repair as soon as possible.
Direction Sensing Incorrect. Have John Deere dealer
repair as soon as possible.
PTI
524228.05
PTI
524228.11
Park Sump Block Circuit Problem. Have John Deere
dealer repair at earliest convenience.
Hydro Control Solenoid Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Clutch Enable Solenoid Circuit Problem. Have John
Deere dealer repair at earliest convenience.
Park Brake Pressure Low/Gear Commanded. Stop
engine, have John Deere dealer repair immediately.
PTI
524232.02
PTI
524232.04
Park Brake Pressure Sensor Problem. Have John
Deere dealer repair at earliest convenience.
Transmission Oil
Pressure Low
Park Brake Pressure Low in Come Home Mode.
Perform Park Brake Release Procedure (see section
80). Wait 5-10 minutes. If code returns, have John
Deere dealer repair immediately.
PTI
524232.16
PTI
524232.17
Park Brake Pressure Problem. Have John Deere
dealer repair as soon as possible.
Transmission Oil
Pressure Low
Park Brake Pressure Low. Have John Deere dealer
repair as soon as possible.

Hydro Fixed Unit Overspeed. Have John Deere
dealer repair as soon as possible.
PTI
524233.07
PTI
524233.15
PTI
524233.16
Hydro Speed Sensor Problem. Have John Deere
dealer repair at earliest convenience.
PTI
524234.02
PTI
524234.04
Clutch Pressure Circuit Problem. Have John Deere
dealer repair at earliest convenience.
Neutral and Park or Scroll Switches on During StartUp. Restart vehicle. If code returns, have John Deere
dealer repair at earliest convenience.
Transmission Lever Not
in Park
Left-Hand Reverser Lever Not in Park or Neutral at
Power Up. Place lever in park or neutral. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
No Motion / Engine Running. Have John Deere
dealer repair at earliest convenience.
No Vehicle Motion for 5 Seconds After "ComeHome" Mode Selected. Have John Deere dealer
repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-19/27
Carrier or Fixed Unit Speed Incorrect. Have John
Deere dealer repair at earliest convenience.
Transmission Oil
Pressure High
Transmission Park and Enable Pressures High. Have
John Deere dealer repair as soon as possible.
Control Unit Command Problem. Have John Deere
dealer repair at earliest convenience.

PTI
524244.31
PTI
524245.31
Hydro Fixed Unit Speed Low at Start-Up. Have John
Deere dealer repair at earliest convenience.
Carrier Speed Circuit Problem. Have John Deere
dealer repair at earliest convenience.
Motion Detected with Park Brake Engaged. Restart
vehicle. Park vehicle on a slight incline. Place lefthand reverser in PARK. Let vehicle sit for 1-2
minutes. If code returns, have John Deere dealer
repair as soon as possible.
Operator Not Present with Transmission in Neutral.
Sit in seat. If code returns, have John Deere dealer
repair as soon as possible.
Park Brake Previously Failed/May Not Hold. Have
John Deere dealer repair as soon as possible.
Control Unit Not Commanding Park at Start-Up.
Place left-hand reverser in PARK. Restart vehicle. If
code returns, have John Deere dealer repair at earliest
convenience.
PTI
524254.03
PTI
524254.04
Transmission Enable Relay Circuit Voltage Problem.
Verify that there is NOT a fuse installed in F5
location. Have John Deere dealer repair at earliest
convenience.
PowrQuad Plus Transmission Control Unit Diagnostic Trouble Codes (PTQ)
PTQ Wheel Speed Message Missing. Have John
Deere dealer repair as soon as possible.
Transmission Oil Filter
Restricted
Check condition and service interval of transmission
oil filter. Restart vehicle. If code returns, have John
Deere dealer repair as soon as possible.
Transmission Oil
Pressure Low
Check transmission fluid level in sight glass on rear
differential case. Restart vehicle. If code returns, have
John Deere dealer repair immediately.

Electrical System
Voltage Low
Visually inspect around the batteries and alternator
for damage or accumulated debris. Restart vehicle. If
code returns, have John Deere dealer repair as soon
as possible.
PTQ Engine Speed Low. Have John Deere dealer
repair as soon as possible.
Transmission Underspeed. Have John Deere dealer
repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-20/27
PTQ
000734.05
PTQ
000735.05
PTQ
000736.05
PTQ
000737.05
Transmission Sensor Circuit Problem. Have John
Deere dealer repair at earliest convenience.
ECU Message Missing. Check fuse F9. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
ACU Message Missing. Have John Deere dealer
repair as soon as possible.
CAB Message Missing. Have John Deere dealer
repair as soon as possible.
CLC Message Missing. Have John Deere dealer
repair as soon as possible.
ICU Message Missing. Have John Deere dealer repair
as soon as possible.
Speed Control Lever Circuit Problem. Have John
Deere dealer repair at earliest convenience.

Operator Not Seated During Reverser Command.
Have John Deere dealer repair at earliest
convenience.
Range Lever Park/Reverser Lever Gear Problem.
Have John Deere dealer repair at earliest
convenience.
Transmission Come
Home Active
Check F5 slot for fuse. Fuse should not be installed
unless vehicle is in Come Home mode. With fuse
removed, operate vehicle for 5 minutes. If code
returns, have John Deere dealer repair as soon as
possible.
Trailer Air Brake Valve Problem. Have John Deere
dealer repair as soon as possible.
PTQ
524230.03
PTQ
524230.04
PTQ
524230.05
PTQ
524234.03
PTQ
524234.04
Clutch Enable Circuit Problem. Have John Deere
dealer repair at earliest convenience.
Transmission Enable Relay Circuit Voltage Low.
Have John Deere dealer repair at earliest
convenience.
Optional SCV Control Unit Diagnostic Trouble Codes (SCO)
SCO
000158.04
SCO
000168.04
Control Unit Supply Voltage Problem. Visually
inspect around the batteries and alternator for any
visual signs of damage or accumulated debris. Check
fuses F12, F24 and F51. Restart vehicle. If code
returns, have John Deere dealer repair at earliest
convenience.
SCO
001963.05
SCO
001975.05
Flow Control Circuit Problem. Have John Deere
dealer repair at earliest convenience.

ACU Message Missing. Have John Deere dealer
repair at earliest convenience.
OU1092A,0000020 -19-28SEP06-21/27
CCU Message Missing. Have John Deere dealer
repair at earliest convenience.
Front Hitch External Switch Circuit Problem. Inspect
front hitch switch, harness and connectors. Restart
vehicle. Cycle front hitch switch through all
positions. If code returns, have John Deere dealer
repair at earliest convenience.
Wire Connector Fault. Incompatible connection.
Have John Deere dealer repair at earliest
convenience.
SCO
523662.05
SCO
523662.06
SCO
523663.05
SCO
523663.06
Auxiliary Valve Current Problem. Have John Deere
dealer repair at earliest convenience.
SCO
523695.02
SCO
523695.19
SCO
523696.02
SCO
523696.19
External Control Message Problem. Have John Deere
dealer repair at earliest convenience.
SCO
523787.03
SCO
523787.04
Auxiliary Solenoid Voltage Problem. Visually
inspect around the batteries and alternator for any
visual signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.

Control Unit Problem. Have John Deere dealer repair
at earliest convenience.
SCO
523930.05
SCO
523930.06
SCO
523931.05
SCO
523931.06
SCV Directional Valve Solenoid Current Problem.
Have John Deere dealer repair at earliest
convenience.
SCO
523936.05
SCO
523936.06
SCO
523937.05
SCO
523937.06
Flow Control Valve Solenoid Current Problem. Have
John Deere dealer repair at earliest convenience.
Operator out of seat with SCV VI on.
Operator out of seat with SCV V on.
SCO
524016.03
SCO
524016.04
Control Unit Supply Voltage Problem. Visually
inspect around the batteries and alternator for any
visual signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
SCV Control Unit Diagnostic Trouble Codes (SCU)
SCU
000158.04
SCU
000168.04
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Check fuses
F24, F44 and F51. Restart vehicle. If code returns,
have John Deere dealer repair at earliest convenience.
SCU
001079.03
SCU
001079.04
Control Unit Sensor Supply Voltage Problem. Have
John Deere dealer repair at earliest convenience.

OU1092A,0000020 -19-28SEP06-22/27
SCU
001915.05
SCU
001927.05
SCU
001939.05
SCU
001951.05
Flow Control Solenoid Current Problem. Have John
Deere dealer repair at earliest convenience.
ACU Message Missing. Check fuse F13. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
CAB Message Missing. Have John Deere dealer
repair at earliest convenience.
CCU Message Missing. Have John Deere dealer
repair at earliest convenience.
Wire Connector Fault. Have John Deere dealer repair
at earliest convenience.
SCU
523693.02
SCU
523693.19
SCU
523694.02
SCU
523694.19
SCV External Control Message Problem. Have John
Deere dealer repair at earliest convenience.
SCU
523786.03
SCU
523786.04
SCU
523786.07
Remote Position Sensor Problem. Have John Deere
dealer repair at earliest convenience.
SCU
523787.03
SCU
523787.04
Control Unit Switched Supply Voltage Problem.
Visually inspect around the batteries and alternator
for any visual signs of damage or accumulated debris.

Restart vehicle. If code returns, have John Deere
dealer repair at earliest convenience.
Control Unit Problem. Have John Deere dealer repair
at earliest convenience.
Control Lever Problem. Have John Deere dealer
repair at earliest convenience.
SCU
523932.05
SCU
523932.06
SCU
523933.05
SCU
523933.06
SCU
523934.05
SCU
523934.06
SCU
523935.05
SCU
523935.06
Direction Control Solenoid Circuit Current Problem.
Have John Deere dealer repair at earliest
convenience.
SCU
523938.05
SCU
523938.06
SCU
523939.05
SCU
523939.06
SCU
523940.05
SCU
523940.06
SCU
523941.05
SCU
523941.06
Flow Control Solenoid Circuit Current Problem.
Have John Deere dealer repair at earliest
convenience.
OU1092A,0000020 -19-28SEP06-23/27

Operator out of seat with SCV IV on.
Operator out of seat with SCV III on.
Operator out of seat with SCV II on.
Operator out of seat with SCV I on.
SCU
524015.02
SCU
524015.19
External Command Message Missing. Have John
Deere dealer repair at earliest convenience.
SCU
524016.03
SCU
524016.04
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
SCU
524038.02
SCU
524038.19
External Control Message Missing. Restart vehicle.
Cycle SCV IV Lever through all positions. If code
returns, have John Deere dealer repair at earliest
convenience.
SCU
524103.31
SCU
524104.31
SCU
524105.31
Control Lever Message Missing. Have John Deere
dealer repair at earliest convenience.
Triple-Link Suspension Control Unit Diagnostic Trouble Codes (SFA)
SFA
000158.04
SFA
000168.04
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
Sensor Supply Voltage Problem. Have John Deere
dealer repair at earliest convenience.

SFA
001079.05
SFA
001079.06
SFA Calibration Problem. Have John Deere dealer
repair at earliest convenience.
PTI or PTQ Message Missing. Check fuse F6 for IVT
or F35 for PowrQuad Plus. Restart vehicle. If code
returns, have John Deere dealer repair at earliest
convenience.
ACU Message Missing. Check fuse F13 for IVT or
F35 PowrQuad Plus. Restart vehicle. If code returns,
have John Deere dealer repair at earliest convenience.
CAB Message Missing. Check fuse F35. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
Control Unit Connected to Wrong Harness. Have
John Deere dealer repair at earliest convenience.
SFA
523902.07
SFA
523903.07
Suspended Front Axle Not Responding to
Commands. Inspect front axle position sensor for
linkage damage. Restart vehicle. Operate vehicle on
rough terrain for 5 minutes. If code returns, have John
Deere dealer repair at earliest convenience.
Control Unit Problem. Have John Deere dealer repair
at earliest convenience.
OU1092A,0000020 -19-28SEP06-24/27
SFA
523948.05
SFA
523948.06
SFA
523949.05
Front Axle Current Problem. Have John Deere dealer
repair at earliest convenience.

SFA
523950.02
SFA
523950.03
SFA
523950.04
Axle Position Sensor Problem. Inspect front axle
position sensor for damage. Have John Deere dealer
repair at earliest convenience.
Switched Supply Voltage Problem. Visually inspect
around the batteries and alternator for any visual
signs of damage or accumulated debris. Restart
vehicle. If code returns, have John Deere dealer
repair at earliest convenience.
AutoTrac Steering System Control Unit Diagnostic Trouble Codes (SSU)
Wheel Speed Message Missing. Have John Deere
dealer repair as soon as possible.
Unswitched Supply Voltage Problem. Visually
inspect around the batteries and alternator for any
visual signs of damage or accumulated debris. If code
returns, have John Deere dealer repair as soon as
possible.
Hydraulic Oil Temperature Message Missing. Restart
vehicle. If code returns, have John Deere dealer
repair as soon as possible.
Gear Message Missing. Check fuse F6 for IVT or
F35 for PowrQuad Plus. Restart vehicle. If code
returns, have John Deere dealer repair as soon as
possible.
GPS Speed Message Missing. Check StarFire
connector. If code returns, have John Deere dealer
repair as soon as possible.
Selected Gear Message Invalid. Restart vehicle. If
code returns, have John Deere dealer repair at earliest
convenience.
Steering Control Unit Not Calibrated. Restart vehicle.
Have John Deere dealer repair as soon as possible.

SSU
001079.03
SSU
001079.04
Sensor Supply Voltage Problem. Have John Deere
dealer repair as soon as possible.
Operator Presence Message Missing. Sit in seat.
Restart vehicle. If code returns, have John Deere
dealer repair as soon as possible.
Operator Not Seated while AutoTrac in on. Sit in
operator's seat and restart vehicle. If code returns,
have John Deere dealer repair as soon as possible.
OU1092A,0000020 -19-28SEP06-25/27
SSU
001807.02
SSU
001807.03
SSU
001807.04
SSU
001807.05
SSU
001807.06
SSU
001807.10
SSU
001807.14
Steering Wheel Position Sensor Problem. Have John
Deere dealer repair as soon as possible.
ELX Message Missing. Have John Deere dealer
repair at earliest convenience.
SSU
522273.00
SSU
522273.01
Steering Valve Control Circuit Problem. Have John
Deere dealer repair as soon as possible.
Wheel Angle Sensor Problem. Have John Deere
dealer repair as soon as possible.

Terrain Compensation Module Message Missing.
Check fuse F23. Restart vehicle. If code returns, have
John Deere dealer repair as soon as possible.
SSU
522451.00
SSU
522451.01
SSU
522451.14
Steering Angle Sensor Problem. Have John Deere
dealer repair at earliest convenience.
Ag Management Solutions (AMS) Display Message
Missing. Have John Deere dealer repair as soon as
possible.
AutoTrac Activation Code Invalid. Have John Deere
dealer repair as soon as possible.
AutoTrac Resume Switch Circuit Problem. Have
John Deere dealer repair as soon as possible.
AutoTrac Steering Valve Workport Connections
Backwards. Have John Deere dealer repair as soon as
possible.
Steering Valve or Harness Faulty. Have John Deere
dealer repair as soon as possible.
Control Unit Calibration Problem. Have John Deere
dealer repair as soon as possible.
SSU
523810.00
SSU
523810.01
SSU
523821.02
Steering Valve Supply Voltage Problem. Have John
Deere dealer repair as soon as possible.
SSU
523824.03
SSU
523824.04
SSU
523824.05
SSU
523824.06
SSU
Steering Wheel Position Sensor Voltage Problem.
Have John Deere dealer repair as soon as possible.

OU1092A,0000020 -19-28SEP06-26/27
SSU
523826.00
SSU
523826.01
SSU
523826.02
SSU
523826.07
SSU
523826.10
SSU
523826.13
SSU
523826.14
Main Primary Steering Sensor Problem. Have John
Deere dealer repair at earliest convenience.
No Communication Data. Have John Deere dealer
repair at earliest convenience.
Tractor Equipment Control Unit Diagnostic Trouble Codes (TEC)
At Least One Non Compliant Device Connected to
Connector. Have John Deere dealer repair as soon as
possible.
Vehicle Load Center Control Unit Diagnostic Trouble Codes (VLC)
Wake Up Signal Voltage Low. Likely an open
circuit. Have John Deere dealer repair at earliest
convenience.
VLC Circuit Current High. Remove all operator
customized accessories such as flood lights, hazard
lights and window wipers. Total output excessive.
Have John Deere dealer repair at earliest
convenience.

CLC Message Missing. Have John Deere dealer
repair at earliest convenience.
High Beam Light Circuit Current Problem. Have
John Deere dealer repair at earliest convenience.
Low Beam Light Circuit Current Problem. Have John
Deere dealer repair at earliest convenience.
Front Outer Flood Light Circuit Current Problem.
Have John Deere dealer repair at earliest
convenience.
Front Inner Flood Light Circuit Current Problem.
Have John Deere dealer repair at earliest
convenience.
Center Spot Light Circuit Current Problem. Have
John Deere dealer repair at earliest convenience.
ELX Output Circuit Current High. Have John Deere
dealer repair at earliest convenience.
Rear Washer Pump Circuit Current Problem. Have
John Deere dealer repair as soon as possible.
Front Washer Pump Circuit Current Problem. Have
John Deere dealer repair at earliest convenience.
Horn Circuit Current Problem. Have John Deere
dealer repair at earliest convenience.