UIC FAULT CODES / UIC ERROR CODES

John Deere UIC fault codes / John Deere UIC diagnostic trouble codes

UIC Control Unit – Transmission Control with AutoPowr/IVT Transmission

UIC 000091.02 (UIC 91.02)— B79 Accelerator Pedal Potentiometer, Voltages at Channel 1 and Channel 2 Not in the Correct Ratio
This diagnostic trouble code is triggered when the control unit detects a mismatch between the output signals of accelerator pedal potentiometer (B79). The voltage at channel 1 (lead 6066) must be double the voltage of channel 2 (lead 6045).

UIC 000091.03 (UIC 91.03)— B79 Accelerator Pedal Potentiometer, Voltage at Channel 1 Too High
This diagnostic trouble code is generated when the control unit measures a voltage of more than 4.5 volts at the signal input from channel 1 of the potentiometer (B79, lead 6066). This indicates a problem at the signal lead or at the potentiometer ground connection.

UIC 000091.04 (UIC 91.04)— B79 Accelerator Pedal Potentiometer, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated when the control unit measures a voltage of less than 0.5 volts at the signal input from channel 1 of the potentiometer (B79, lead 6066). This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 000191.19 (UIC 191.19)— Incorrect CAN BUS Message, Transmission Output Speed from TCU
The diagnostic trouble code is generated if the TCU does not register any transmission output speed and so cannot provide the CAN BUS with any data. A transmitted replacement value generates this diagnostic trouble code in the UIC. In its active state, this fault also generates a diagnostic trouble code at the TCU. The TCU diagnostic trouble code takes priority.

UIC 000237.02 (UIC 237.02)— VIN Information, Mismatch
The diagnostic trouble code is generated when the Vehicle Identification Number (VIN) from other control units is not the same.

UIC 000237.14 (UIC 237.14)— VIN Information, System DeActivated
The diagnostic trouble code is generated when the VIN security function was not enabled due to an internal problem. This indicates an incorrect reprogramming of the control unit.

UIC 000237.31 (UIC 237.31)— VIN Information, Incorrect
The diagnostic trouble code is generated when the vehicle identification number from other control units is not received or incorrectly received. All active VIN participants have to send the programmed vehicle identification number to the UIC at regular intervals.

UIC 000587.31 (UIC 587.31)— Control Unit, Wrong Input Value
This diagnostic trouble code is generated if an invalid tractor type is detected in address UIC036 during initialization (booting the control unit after ignition ON). This indicates that the UIC has not been programmed properly or has not been programmed at all.

UIC 000598.31 (UIC 598.31)— S72 Clutch Pedal Switch, Signal Not Plausible
This diagnostic trouble code is generated if the switch position of clutch pedal switch S72 (transmitted as a CAN message by the TCU) does not match the position of the clutch pedal (ascertained via the signal from clutch pedal potentiometer B65).

UIC 000606.16 (UIC 606.16)— Engine Speed Too High
This diagnostic trouble code provides information only and is triggered if the control unit detects that engine speed is too high. It is necessary to reduce speed (travel speed). Excessive speed is indicated, when there is NO weight pushing from behind to account for it: Deal with the relevant ECU diagnostic trouble codes.

UIC 000628.02 (UIC 628.02)— Control Unit Internal Fault
This diagnostic trouble code is triggered when the control unit detects an internal problem during initializing (control unit boot sequence after the ignition is switched ON).

UIC 000629.12 (UIC 629.12)— Control Unit Internal Fault
The diagnostic trouble code is generated when the control unit internally detects that too much time has elapsed (watchdog).

UIC 000639.12 (UIC 639.12)— Power Train CAN BUS, High Error Rate
This diagnostic trouble code is generated when the control unit receives too many incorrect CAN BUS messages or when it detects a general problem in the connection to the power train CAN BUS.

UIC 000639.14 (UIC 639.14)— Power Train CAN BUS, Very High Error Rate
This diagnostic trouble code is generated when the control unit receives too many incorrect CAN BUS messages or if it detects a general problem in the connection to the power train CAN BUS.

UIC 000974.02 (UIC 974.02)— B78 Hand Throttle Potentiometer, Voltages at Channel 1 and Channel 2 Not in the Correct Ratio
This diagnostic trouble code is triggered when the control unit detects a mismatch between the output signals of hand throttle potentiometer (B78). The voltage at channel 1 (lead 6077) must be double the voltage of channel 2 (lead 6036).

UIC 000974.03 (UIC 974.03)— B78 Hand Throttle Potentiometer, Voltage at Channel 1 Too High
This diagnostic trouble code is generated when the control unit measures a voltage of more than 4.5 volts at the signal input from channel 1 of the potentiometer (B78, lead 6077). This indicates a problem at the signal lead or at the potentiometer ground connection.

UIC 000974.04 (UIC 974.04)— B78 Hand Throttle Potentiometer, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated when the control unit measures a voltage of less than 0.5 volts at the signal input from channel 1 of the potentiometer (B78, lead 6077). This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 001079.02 (UIC 1079.02)— 5Volt Components, Power Supply Fault
This diagnostic trouble code is triggered if the control unit detects several incorrect output signals from the 5volt components (potentiometers for brake pedal, clutch pedal, speed control lever, accelerator pedal and hand throttle). This indicates a problem in the 5volt power supply. If diagnostic trouble code UIC 001079.03 or UIC 001079.04 is not stored as well, this indicates a problem at ground lead 6031 (the ground lead for the 5volt components).

UIC 001079.03 (UIC 1079.03)— 5Volt Components, Supply Voltage Too High
The diagnostic trouble code is generated when more than 5.5 volts are measured at the positive power supply lead 6033 for 5 voltcomponents (potentiometers for brake pedal, clutch pedal, speed control lever, accelerator pedal and hand throttle) over a period of more than one second. This indicates a shorted circuit.

UIC 001079.04 (UIC 1079.04)— 5Volt Components, Supply Voltage Too Low
The diagnostic trouble code is generated when less than 4.5 volts are measured at the positive power supply lead 6033 for 5 voltcomponents (potentiometers for brake pedal, clutch pedal, speed control lever, accelerator pedal and hand throttle) over a period of more than one second. This indicates a short to ground.

UIC 001504.30 (UIC 1504.30)— S40 Operator Presence Switch, Faulty Signal
This diagnostic trouble code is triggered if the control unit receives a signal from the operator presence switch (S40, lead 6087) without interruption for 20 hours. This indicates a short in the signal lead.

UIC 001504.31 (UIC 1504.31)— INFORMATION FOR OPERATOR: Power Zero is preselected without there being a valid signal indicating operator presence
This information for the operator (diagnostic trouble code) is triggered if the reverse drive lever position “power zero” is activated for longer than 30 seconds, even although there is not any valid signal to indicate that the operator is present (operator on seat, clutch or brake pedals depressed).

UIC 001713.15 (UIC 1713.15)— Hydraulic Oil Filter Dirty
The diagnostic trouble code is generated when the filter alarm level 1 switch at hydraulic oil filter was closed for more than three seconds at a transmission oil temperature of above 28 °C (82 °F) and an engine speed of more than 700 rpm. The switch closes at a differential filter pressure of 350 kPa (3.5 bar; 51 psi) +/20 kPa (0.2 bar; 2.9 psi). This indicates that the hydraulic oil filter is contaminated. Change the hydraulic oil filter.

UIC 001713.16 (UIC 1713.16)— Hydraulic Oil Filter Restricted
The diagnostic trouble code is generated when the filter alarm level 2 switch at hydraulic oil filter was closed for more than three seconds at a transmission oil temperature of above 28 °C (82 °F) and an engine speed of more than 700 rpm. The switch closes at a differential filter pressure of 425 kPa (4.25 bar; 62 psi) +/25 kPa (0.25 bar; 4 psi). This indicates that the hydraulic oil filter is contaminated. Change the hydraulic oil filter.

UIC 002000.09 (UIC 2000.09)— Incorrect CAN BUS Message, Information from ECU
This diagnostic trouble code is generated when a data transfer problem occurs between the ECU and UIC. Reception of CAN messages regarding engine load, engine temperatures and/or engine speed from the ECU control unit is intermittent or nonexistent (intermittent reception could be due to a loose wire).

UIC 002003.09 (IC 2003.09)— Incorrect CAN BUS Message, Information from TCU
This diagnostic trouble code is generated when a data transfer problem occurs between the TCU and UIC. Reception of CAN messages regarding transmission ratios (status, desired and calculated) and/or general transmission information (rotational speeds, direction of travel, etc.) from the TCU control unit is intermittent or nonexistent (intermittent reception could be due to a loose wire).

UIC 002033.09 (UIC 2033.09)— Incorrect CAN BUS Message, Information from BCU
This diagnostic trouble code is generated when a data transfer problem occurs between the BCU and UIC. Reception of the CAN message from the BCU control unit regarding the status of the frontwheel drive is intermittent or nonexistent (intermittent reception could be due to a loose wire). The missing CAN message is ignored by the UIC control unit once engagement of frontwheel drive has been reported by the BCU control unit.

UIC 522431.11 — Control Unit Internal Fault
This diagnostic trouble code is generated if an electronic malfunction is registered in the control unit.

UIC 523438.02 — Control Unit Internal Fault
If a fault occurs when the internal module (EEPROM) intervenes, this diagnostic trouble code is triggered.

UIC 523652.02 — Control Unit Connected to Wrong Wiring Harness Connector
The diagnostic trouble code is generated when the control unit detects an erroneous signal in the circuit of the control unit identification during initializing (control unit boot sequence after the ignition is switched ON).

UIC 523953.02 — B67 Potentiometer of Speed Control Lever, Voltages at Channel 1 and Channel 2 not in the Correct Ratio
This diagnostic trouble code is triggered when the control unit detects a mismatch between the output signals of the potentiometer on speed control lever (B67). The voltage at channel 1 (lead 6037) must be double the voltage of channel 2 (lead 6038).

UIC 523953.03 — B67 Potentiometer of Speed Control Lever, Voltage at Channel 1 Too High
This diagnostic trouble code is generated when the control unit measures a voltage of more than 4.5 volts at the signal input from channel 1 of the potentiometer (B67, lead 6037). This indicates a problem at the signal lead or at the potentiometer ground connection.

UIC 523953.04 — B67 Potentiometer of Speed Control Lever, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated when the control unit measures a voltage of less than 0.5 volts at the signal input from channel 1 of the potentiometer (B67, lead 6037). This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 523954.11 — S108 Sensor Unit for Speed Control Lever (Speed Wheel), Output Signals do Not Match
This diagnostic trouble code is triggered if the control unit detects an incorrect combination of signals at the output channels (channel 1, lead 6079 and channel 2, lead 6048) of the speed wheel on the sensor unit for speed control lever (S108).

UIC 523956.31 — INFORMATION FOR OPERATOR: Engine Has Stopped Reverse Drive Lever Still in Position for a Direction of Travel
This information for the operator (diagnostic trouble code) is triggered if the engine has shut down while the ignition is still switched on and the reverse drive lever is still in the position for a direction of travel. To restart, the reverse drive lever must first be moved to the position for neutral or corner park.

UIC 523957.31 — INFORMATION FOR OPERATOR: Tractor Startup with Reverse Drive Lever Not in Neutral or Corner Park
This information for the operator (diagnostic trouble code) is generated if the reverse drive lever is neither in neutral nor corner park while the tractor is being jumpstarted. The following checks must be done only if the diagnostic trouble code has been generated without a jumpstart being performed.

UIC 523959.31 — Fault at Transmission
This diagnostic trouble code is triggered if the control fails to detect tractor motion even although all the preconditions for motion are met. In its active state, this fault also generates a diagnostic trouble code at the TCU or PLC. These diagnostic trouble codes take priority.

UIC 523960.31 — INFORMATION FOR OPERATOR: Travel speed is preselected without there being a valid signal indicating operator presence
This information for the operator (diagnostic trouble code) is triggered if a direction of travel has been activated, even although there is not any valid signal to indicate that the operator is present (operator on seat, clutch or brake pedals depressed).

UIC 523961.02 — Park Lock cannot be Disengaged
The diagnostic trouble code is generated if there is a park lock engagement signal at the control unit, even though the reverse drive lever is not in park position. However, this diagnostic trouble code may also be generated by mistake during transmission calibration.

UIC 523961.07 — Park Lock, Fault
The diagnostic trouble code is generated under the following conditions:
• if the park lock does not engage, even though the UIC commands park position and the tractor’s travel speed is such that engagement is permitted.
• if a travel speed signal is present, even though the park position is commanded and the UIC has received confirmation that the park lock is engaged.

UIC 523961.12 — Park Lock, Fault (Travel Speed Detected with Park Lock Engaged)
The diagnostic trouble code is generated when the UIC control unit detects a travel speed of more than 0.1 km/h (0.06 mph) for longer than 0.7 seconds after engaging the park lock.

UIC 523962.31 — B89 FrontWheel Drive Axle Speed Sensor, Signal does Not Match Transmission Output Speed
The diagnostic trouble code is generated under the following circumstances when the transmission oil temperature is above 10° (50°) and frontwheel drive is engaged:
• Difference between frontwheel drive axle speed and transmission output speed above 4% for more than 3 seconds.
• Frontwheel drive axle speed below/at 200 rpm at a travel speed of more than 0.7 km/h (0.4 mph).

UIC 523966.11 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Restart
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should restart the tractor if he wants to reactivate the comehome function.

UIC 523966.14 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Select a Direction of Travel
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should select a direction of travel to gain access to the next stage of the comehome function.
Alarm level: Information. The diagnostic trouble code is not stored. It is intended only as information for the operator.

UIC 523966.31 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Move Reverse Drive Lever To Neutral or Park Position
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should move the revere drive lever to its neutral or park position to gain access to the next stage of the comehome function.

UIC 523967.02 — S108 Sensor Unit for Speed Control Lever, Fault in Set Speed 1
This diagnostic trouble code is generated if there is a mismatch between the signals of the switch for speed band 2 and of the potentiometer of the speed control lever (B67). The signal of the activated switch for speed band 2 is being received, even though the speed control lever is in speed band 1.

UIC 523967.04 — S108 Sensor Unit for Speed Control Lever, Fault in Set Speed 2
This diagnostic trouble code is generated if there is a mismatch between the signals of the switch for speed band 2 and of the potentiometer of the speed control lever (B67). The signal of the activated switch for speed band 2 is not being received, even though the speed control lever is in speed band 2.

UIC 524014.31 — S80 Reverse Drive Lever, Faulty Signal from Park Lock Switch
The diagnostic trouble code is generated when the signal received from the park lock switch does not correspond to the position of the reverse drive lever. The control unit receives the signal from an activated park lock switch (corner park or center park) together with a signal of the switches for tractor movement and direction of travel.

UIC 524017.14 — S80 Reverse Drive Lever, Faulty Signals
The diagnostic trouble code is generated when the control unit receives an incorrect combination of signals from the reverse drive lever (neutral, park lock, direction or tractor movement switches).

UIC 524017.31 — S80 Reverse Drive Lever, Power Supply Fault
The diagnostic trouble code is generated when the control unit detects an incorrect status of the neutral switch and/or the reverse switch. This indicates a problem with the switches or a general problem with the 12 volt power supply of the reverse drive lever.

UIC 524018.31 — S80 Reverse Drive Lever, Park Lock Switch and Neutral Switch or Power Zero Switch are Actuated Simultaneously for Too Long a Period
The diagnostic trouble code is generated when the control unit receives a switch combination from an undefined position of the reverse drive lever (intermediate position) over a longer period of time. The signal of one park lock switch (corner park or center park) is received together with the signal of the neutral switch or of the power zero switch for too long. This diagnostic trouble code does not necessarily have any real meaning. It can also be generated when the reverse drive lever is held in an intermediate position for too long. For this reason, diagnosis only needs to be performed if one or more related faults occur in conjunction with this code.

UIC 524019.31 — S80 Reverse Drive Lever, PowerZero Switch, Tractor Movement Switch and either the Forward or Reverse Switch are Activated Simultaneously for Too Long a Period
The diagnostic trouble code is generated when the control unit receives a switch combination from an undefined position of the reverse drive lever (intermediate position) over a longer period of time. The signal of one direction switch (forward travel or reverse travel) is received together with the signal of the tractor movement switch or of the power zero switch for too long. This diagnostic trouble code does not necessarily have any real meaning. It can also be generated when the reverse drive lever is held in an intermediate position for too long. For this reason, diagnosis only needs to be performed if one or more related faults occur in conjunction with this code.

UIC 524020.31 — INFORMATION FOR OPERATOR: Reverse Drive Lever is in the Position for Forward or Reverse Travel During Startup Procedure
This information for the operator (diagnostic trouble code) is generated when the reverse drive lever is in the position for forward or reverse travel while the tractor is being started or the ignition is being turned on. If the diagnostic trouble code is generated although the reverse drive lever is not in a position for direction of travel: Do a ”S80 Reverse Drive Lever, Operational Check” in Section 245, Group UIC.

UIC 524021.31 — S80 Reverse Drive Lever, Switches are Actuated Simultaneously
The diagnostic trouble code is generated when the control unit receives an incorrect combination of signals from the reverse drive lever (neutral, park lock, direction, power zero or tractor movement switches).

UIC 524022.31 — S80 Reverse Drive Lever, No Switch Signal
The diagnostic trouble code is generated when the control unit only detects signals from reverse drive lever switches that are not activated.

UIC 524024.31 — S80 Reverse Drive Lever, Forward and Reverse Switches Actuated At Same Time
The diagnostic trouble code is generated when the control unit receives the signal of an activated forward and reverse switch at the same time.

UIC 524025.31 — S80 Reverse Drive Lever, Forward Switch or Reverse Switch has been Opened by Mistake
The diagnostic trouble code is generated when there is no active signal of a direction switch even though the reverse drive lever is in the position for a direction of travel.

UIC 524027.31 — S80 Reverse Drive Lever, Forward or Reverse Switch is Actuated Simultaneously with the Park Lock Switch
The diagnostic trouble code is generated when the control unit receives a signal of one direction switch (forward travel or reverse travel) together with the signal of the corner park switch and of the power zero switch.

UIC 524030.31 — S80 Reverse Drive Lever, Faulty Signal from Reverse Switch
The diagnostic trouble code is generated when the control unit receives an active signal from the reverse switch that does not correspond to the position of the reverse drive lever.

UIC 524031.31 — S80 Reverse Drive Lever, Faulty Signal from Forward Switch
The diagnostic trouble code is generated when the control unit receives an active signal from the forward switch that does not correspond to the position of the reverse drive lever.

UIC 524032.01 — S80 Reverse Drive Lever, Tractor Movement Switch or Power Zero Switch has been Opened by Mistake
The diagnostic trouble code is generated when there is no active signal of the tractor movement switch and/or the power zero switch even thoug

UIC 524032.04 — S80 Reverse Drive Lever, Faulty Signal from Tractor Movement Switch
The diagnostic trouble code is generated when the control unit receives an active signal from the tractor movement switch that does not correspond to the position of the reverse drive lever.

UIC 524036.01 — S80 Reverse Drive Lever, Faulty Signal from Neutral Switch or Power Zero Switch
The diagnostic trouble code is generated when the control unit receives an active signal from the neutral switch together with an active signal from the power zero switch.

UIC 524036.31 — S80 Reverse Drive Lever, Faulty Signal from Neutral Switch
The diagnostic trouble code is generated when the control unit receives an active signal from the neutral switch that does not correspond to the position of the reverse drive lever.

UIC 524109.19 — Incorrect CAN BUS Message, Transmission Output Speed from TCU and PLC
The diagnostic trouble code is generated when the TCU and the PLC do not register any transmission output speed and thus cannot provide the CAN BUS with any data. A transmitted replacement value generates this diagnostic trouble code in the UIC. In its active state, this fault also generates a diagnostic trouble code at the TCU and/or PLC. These diagnostic trouble codes take priority.

UIC 524166.02 — B88 Sensor Unit for Brake Pedal, Fault at Right Pedal
The diagnostic trouble code is generated under the following conditions:
• Right or left brake pedal switch not actuated with a voltage of more than 1.8 volts at the right brake pedal potentiometer.
• Right or left brake pedal switch actuated with a voltage of less than 0.02 volts at the right brake pedal potentiometer.

UIC 524166.03 — B88 Sensor Unit for Brake Pedal (Potentiometer), Voltage Too High at Right Pedal
This diagnostic trouble code is generated when the control unit measures a voltage in excess of 4.5 volts at the signal input of the right brake pedal potentiometer. This indicates a short in or a problem with the ground connection in the potentiometer’s circuit.

UIC 524166.04 — B88 Sensor Unit for Brake Pedal (Potentiometer), Voltage Too Low at Right Pedal
This diagnostic trouble code is generated when the control unit measures a voltage below 0.5 volts at the signal input of the right brake pedal potentiometer. This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 524166.30 — B88 Sensor Unit for Brake Pedal (Potentiometer), Adjustment Error at Right Pedal
The diagnostic trouble code is generated when the following conditions are present for more than 10 minutes:
• Voltage on the right potentiometer below 0,6 volts while the voltage on the left potentiometer is below 1,4 volts.
• Voltage on the right potentiometer above 1,4 volts while the voltage on the left potentiometer is below 1,4 volts.
• Voltage on the right potentiometer continuously above 1.3 volt (+/0.05 volts). This indicates the brake pedal is not adjusted correctly.

UIC 524169.02 — B88 Sensor Unit for Brake Pedal, Fault at Left Pedal
The diagnostic trouble code is generated under the following conditions:
• Right or left brake pedal switch not actuated with a voltage of more than 1.8 volts at the left brake pedal potentiometer.
• Right or left brake pedal switch actuated with a voltage of less than 0.02 volts at the left brake pedal potentiometer.

UIC 524169.03 — B88 Sensor Unit for Brake Pedal (Potentiometer), Voltage Too High at Left Pedal
This diagnostic trouble code is generated when the control unit measures a voltage in excess of 4.5 volts at the signal input of the left brake pedal potentiometer. This indicates a short in or a problem with the ground connection in the potentiometer’s circuit.

UIC 524169.04 — B88 Sensor Unit for Brake Pedal (Potentiometer), Voltage Too Low at Left Pedal
This diagnostic trouble code is generated when the control unit measures a voltage below 0.5 volts at the signal input of the left brake pedal potentiometer. This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 524169.30 — B88 Sensor Unit for Brake Pedal (Potentiometer), Adjustment Error at Left Pedal
The diagnostic trouble code is generated when the following conditions are present for more than 10 minutes:
• Voltage on the left potentiometer below 0,6 volts while the voltage on the right potentiometer is below 1,4 volts.
• Voltage on the left potentiometer above 1,4 volts while the voltage on the right potentiometer is below 1,4 volts.
• Voltage on the left potentiometer continuously above 1.3 volt (+/0.05 volts). This indicates the brake pedal is not adjusted correctly

UIC 524173.02 — B65 Clutch Pedal Potentiometer, Voltages at Channel 1 and Channel 2 not in the Correct Ratio
The diagnostic trouble code is generated when the control unit detects a mismatch between the output signals of clutch pedal potentiometer (B65). The voltage at channel 1 (lead 6114) must be double the voltage of channel 2 (lead 6007).

UIC 524173.03 — B65 Clutch Pedal Potentiometer, Voltage at Channel 1 Too High
This diagnostic trouble code is generated when the control unit measures a voltage of more than 4.5 volts at the signal input from channel 1 of the potentiometer (B65, lead 6114). This indicates a problem at the signal lead or at the potentiometer ground connection.

UIC 524173.04 — B65 Clutch Pedal Potentiometer, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated when the control unit measures a voltage of less than 0.5 volts at the signal input from channel 1 of the potentiometer (B65, lead 6114). This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.

UIC 524173.07 — B65 Clutch Pedal Potentiometer, Adjustment Error
The diagnostic trouble code is generated if the control units detects a constant voltage signal (+0.2 volts) from a lightly applied clutch pedal over a period of at least 10 minutes.

UIC 524180.07 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Press Clutch Pedal to Stop
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should depress the clutch pedal if he wants to stop the tractor.
Alarm level: Information. The diagnostic trouble code is not stored. It is intended only as information for the operator.

UIC 524180.14 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Depress the Clutch Pedal Fully
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should depress the clutch pedal fully to gain access to the next stage of the comehome function.
Alarm level: Information. The diagnostic trouble code is not stored. It is intended only as information for the operator.

UIC 524180.31 — Tractor in ComeHome Mode INFORMATION FOR OPERATOR: Release the Clutch Pedal
This operator information (diagnostic trouble code) is generated when the comehome mode is activated (K07/04 or K03/04 connector for comehome feature in COME HOME position). The operator is informed that he should release the clutch pedal to gain access to the next stage of the comehome function.
Alarm level: Information. The diagnostic trouble code is not stored. It is intended only as information for the operator.

UIC 524188.01 — Control Unit Internal Fault
The diagnostic trouble code is generated when the control unit internally detects that too much time has elapsed.

UIC 524190.14 — INFORMATION FOR OPERATOR: AntiJackKnife Control Activated
This operator information (diagnostic trouble code) is generated if the UIC has activated the antijackknife control in response to a change in ratio of the front and rear axle operating speeds (frontwheel drive disengaged).

UIC 524193.14 — INFORMATION FOR OPERATOR: Transmission Warmup Routine is Active
This operator information (diagnostic trouble code) is generated if the TCU control unit detects a transmission oil temperature that is too cold for the tractor to operate. The transmission is in its warmup routine. If the tractor goes through its warmup routine every time the engine is restarted, although the transmission oil is obviously warm already, this indicates that the transmission oil temperature sensor is defective: Process the TCU diagnostic trouble codes and do the ”Transmission Oil Temperature Sensor, Operational Check”; see Section 245, Group TCU.

UIC 524193.31 — INFORMATION FOR OPERATOR: Transmission Warmup Routine cannot be Activated, Park Lock should be Engaged
This operator information (diagnostic trouble code) is generated if the TCU control unit detects a transmission oil temperature that is too cold for the tractor to operate. However, the transmission’s warmup routine cannot be activated until the reverse drive lever has been moved to its park lock position.

UIC 524254.31 — K06/03 or K02/03 Transmission Enable Relay, Fault
The diagnostic trouble code is generated if the UIC control unit detects a problem with the circuit of the transmission enable relay (K06/03 or K02/03). This indicates a defective relay, or a problem with the ground circuit (lead 6003), or with the circuit of the control lead (6064).
• Relay K06/03: Tractors up to Serial Number Break 2008.
• Relay K02/03:: Tractors from Serial Number Break 2008.

UIC 524264.02 — Control Unit Internal Fault
The diagnostic trouble code is generated when an electronic malfunction is registered in the control unit.

UIC 600006.31 — Diagnostic Trouble Code Not Known
This diagnostic trouble code is triggered by the CommandCenter (DTI) when the DTI receives a UIC diagnostic trouble code via the CAN BUS that is not stored in the DTI memory. This ”general” diagnostic trouble code enables the CommandCenter (DTI) to display information relating to this unknown UIC diagnostic trouble code.

John Deere fault codes / John Deere diagnostic trouble codes
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