On vehicles with AutoPowr™/IVT™ transmission, the TIA control software and the PTA control software jointly control the transmission. The TIA control software is included in the Cab Control Unit.
The following signals are sent to the TIA control software via the vehicle CAN bus (500 kBd):
– Position of reverse drive lever (LHR)
– Position of speed control lever
– Travel speed
– Tire size
– Speed and torque request.
The TIA control software processes the incoming signals and transmits them to the transmission enable relay and the PTA control software.

John Deere TIA fault codes / John Deere TIA diagnostic trouble codes

NOTE:This page only indicates the meaning of the fault codes. For complete troubleshooting information, see the technical manuals.

TIA 000091.02 (TIA 91.02)— Accelerator Pedal Potentiometer, Voltages at Channel 1 and Channel 2 Not in the Correct Ratio
This diagnostic trouble code is generated if the control software detects a mismatch between the output signals of accelerator pedal potentiometer. The voltage at channel 1 must be double the voltage of channel 2. In its active state, this diagnostic trouble code also generates a diagnostic trouble code at the OIC control software.
Reaction of the control software: Limited or no function of the accelerator pedal potentiometer.

TIA 000091.03 (TIA 91.03)— Accelerator Pedal Potentiometer, Voltage at Channel 1 Too High
This diagnostic trouble code is generated if the control software measures a voltage of more than 4.5 volts at the signal input from channel 1 of the accelerator pedal potentiometer. This indicates a problem at the signal lead or at the ground connection of the potentiometer.
Reaction of the control software: Limited or no function of the accelerator pedal potentiometer.

TIA 000091.04 (TIA 91.04)— Accelerator Pedal Potentiometer, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated if the control software measures a voltage of less than 0.5 volts at the signal input from channel 1 of the accelerator pedal potentiometer. This indicates a problem at the signal lead or a problem with the potentiometer supply voltage.
Reaction of the control software: Limited or no function of the accelerator pedal potentiometer.

TIA 000190.01 (TIA 190.01)— INFORMATION FOR OPERATOR: Engine Speed Too Low
To prevent the engine from stalling, the transmission is shifted into neutral until the engine speed is increased.

TIA 000191.19 (TIA 191.19)— Incorrect CAN BUS Message, Transmission Output Speed from PTA Control Software
This diagnostic trouble code is generated if the PTA control software 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 TIA control software. In its active state, this fault also generates a diagnostic trouble code at the PTA control software. The PTA diagnostic trouble code takes priority.
Reaction of the control software: Limited or no function of the control software.

TIA 000237.02 (TIA 237.02)— VIN Information, Mismatch
This diagnostic trouble code is generated if the Vehicle Identification Number (VIN) from other control units / control software is not the same.
Reaction of the control software: Limited function of vehicle.

TIA 000237.14 (TIA 237.14)— VIN Information, System De-Activated
This diagnostic trouble code is generated if the VIN security function was not enabled due to an internal problem. This indicates an incorrect reprogramming of the control software.
Reaction of the control software: Limited function of vehicle.

TIA 000237.31 (TIA 237.31)— VIN Information, Incorrect
This diagnostic trouble code is generated if the vehicle identification number from other control units / control software is not received or is incorrectly received. All active VIN participants have to send the programmed vehicle identification number to the control software at regular intervals.
Reaction of the control software: Limited function of vehicle.

TIA 000587.31 (TIA 587.31)— Control Software Incorrectly Configured
The diagnostic trouble code is generated if the TIA control software detects a false setting/input in the tractor model address.
Reaction of the control software: Limited or no function of the control software.

TIA 000598.31 (TIA 598.31)— Clutch Pedal Switch, Malfunction
This diagnostic trouble code is generated if the switch position of the clutch pedal switch (transmitted as a CAN message by the PTA control software) does not match the position of the clutch pedal (ascertained via the signal from the clutch pedal potentiometer).
Reaction of the control software: Limited or no function of the control software.

TIA 000606.16 (TIA 606.16)— Engine Speed Too High
This diagnostic trouble code provides information only and is generated if the control software detects that engine speed is too high. It is necessary to reduce speed (ground 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.
Reaction of the control software: Limited or no function of the control software.

TIA 000628.02 (TIA 628.02)— Control Software Internal Fault
This diagnostic trouble code is generated if there was an error when reading the internal module (EEPROM).
Reaction of the control software: Limited or no function of the control software.

TIA 000629.12 (TIA 629.12)— Control Software Internal Fault
The diagnostic trouble code is generated if the control software detects that too much time has elapsed (watchdog).
Reaction of the control software: Limited or no function of the control software.

TIA 000639.12 (TIA 639.12)— 500 kBd Vehicle CAN BUS, High Error Rate
This diagnostic trouble code is generated if the control software receives too many incorrect CAN BUS messages
or if it detects a general problem in the connection to the 500 kBd vehicle CAN BUS.
Reaction of the control software: Limited or no function of the control software.

TIA 000974.02 (TIA 974.02)— Hand Throttle Potentiometer, Voltages at Channel 1 and Channel 2 Not in the Correct Ratio
This diagnostic trouble code is generated if the control software detects a mismatch between the output signals of hand throttle potentiometer. The voltage at channel 1 has to be double the voltage of channel 2.
Reaction of the control software: Limited or no function of the hand throttle potentiometer.

TIA 000974.03 (TIA 974.03)— Hand Throttle Potentiometer, Voltage at Channel 1 Too High
The diagnostic trouble code is generated if the control software measures a voltage of more than 4.5 V at the signal input from channel 1 of the potentiometer. This indicates a problem at the signal lead or at the ground connection of the potentiometer.
Reaction of the control software: Limited or no function of the hand throttle potentiometer.

TIA 000974.04 (TIA 974.04)— Hand Throttle Potentiometer, Voltage at Channel 1 Too Low
The diagnostic trouble code is generated if the control software measures a voltage of less than ,5 V at the signal input from channel 1 of the potentiometer. This indicates a problem on the signal lead or a problem with the potentiometer supply voltage.
Reaction of the control software: Limited or no function of the hand throttle potentiometer.

TIA 001504.30 (TIA 1504.30)— Operator Presence Switch, Signal Faulty
This diagnostic trouble code is generated if the control software receives a signal from the operator presence switch without interruption for 20 hours. This indicates a short in the signal lead.
Reaction of the control software: Limited or no function of the stepper motors.

TIA 001504.31 (TIA 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 generated 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).

TIA 002000.09 (TIA 2000.09)— Incorrect CAN BUS Message, Information from ECU Control Software
The diagnostic trouble code is generated if a data transfer problem occurs between the ECU control software and the TIA control software. Reception of messages sent on the CAN BUS by the ECU control software is intermittent or non-existent. This indicates an open circuit in the CAN BUS line, a short circuit or faulty CAN BUS terminating resistors.
Reaction of the control software: Limited or no function of the control software.

TIA 002003.07 (TIA 2003.07)— Incorrect CAN BUS Message, Engine Speed and Transmission Input Speed
The TIA control software compares the CAN BUS messages (engine speed and transmission input speed). This diagnostic trouble code is generated if the two speeds deviate from each other by more than 100 rpm for at least 5 seconds. This indicates that there is a problem at a speed sensor or in the circuit associated with it.
Reaction of the control software: Limited or no function of the control software.

TIA 002003.09 (TIA 2003.09)— Incorrect CAN Bus Message, Information from PTA Control Software
The diagnostic trouble code is generated if a data transfer problem occurs between the PTA control software and the TIA control software. Reception of messages sent on the CAN Bus by the control software is intermittent or non-existent. This indicates an open circuit in the CAN BUS line, a short circuit or faulty CAN BUS terminating resistors.
Reaction of the control software: Limited or no function of the control software.

TIA 002033.09 (TIA 2033.09)— Incorrect CAN BUS Message, Information from PDU Control Software
The diagnostic trouble code is generated if a data transfer problem occurs between the PTA control software and the PDU control software. Reception of messages sent on the CAN BUS by the PDU control software is intermittent or non-existent. This indicates an open circuit in the CAN BUS line, a short circuit or faulty CAN BUS terminating resistors.
Reaction of the control software: Limited or no function of the control software.

TIA 002826.31 (TIA 2826.31)— Reverse Drive Lever, Positions Actuated Simultaneously
This diagnostic trouble code is generated if the control software receives an incorrect combination of signals for the position of the reverse drive lever.
Reaction of the control software: Limited or no function of the reverse drive lever.

TIA 002828.31 (TIA 2828.31)— Reverse Drive Lever, Positions Actuated Simultaneously for Too Long a Period
This diagnostic trouble code is generated if the control software receives an incorrect combination of signals for the position of the reverse drive lever over a protracted period of time. This diagnostic trouble code can also be generated if 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.
Reaction of the control software: Limited or no function of the reverse drive lever.

TIA 003032.02 (TIA 3032.02)— Sensor Unit for Right Brake Pedal, Malfunction
This diagnostic trouble code is generated if the control software detects that the right brake pedal sensor unit indicates over 2 volts although the brake pedal switch is closed, or the brake pedal sensor unit indicates less than 1.1 volts although the brake pedal switch is open.
Reaction of the control software: Limited or no function of the brake pedal sensor unit.

TIA 003033.02 (TIA 3033.02)— Sensor Unit for Left Brake Pedal, Malfunction
This diagnostic trouble code is generated if the control software detects that the left brake pedal sensor unit indicates over 2 volts although the brake pedal switch is closed, or the brake pedal sensor unit indicates less than 1.1 volts although the brake pedal switch is open.
Reaction of the control software: Limited or no function of the left brake pedal sensor unit.

TIA 003509.02 (TIA 3509.02)— 5-Volt Supply Voltage Faulty
This diagnostic trouble code is generated if the control software detects several incorrect output signals from the 5-volt components. This indicates a problem in the 5-volt supply voltage. If diagnostic trouble code TIA 003509.03 or TIA 003509.04 has not been stored as well, this indicates a problem at ground lead for the 5-V components.
Reaction of the control software: Limited or no function of the transmission.

TIA 003509.03 (TIA 3509.03)— 5-Volt Supply Voltage, Voltage Too High
The diagnostic trouble code is generated if the voltage measured at the positive voltage supply for 5-V components is above 5.25 V. This indicates a short circuit to a positive lead.
Reaction of the control software: Limited or no function of the transmission.

TIA 003509.04 (TIA 3509.04)— 5-Volt Supply Voltage, Voltage Too Low
The diagnostic trouble code is generated if the voltage measured at the positive voltage supply for 5-V components is below 4.75 V. This indicates a short circuit to ground.
Reaction of the control software: Limited or no function of the transmission.

TIA 004310.09 (TIA 4310.09)— Incorrect CAN BUS Message, Information from Implement
The diagnostic trouble code is issued when no valid information is received from the implement or the implement has disabled the automation while the tractor was stationary. Perform operator information (TIA 520283.14) to restart the automation.
Reaction of the control software: All functions of the Tractor-Implement Automation™ are deactivated.

TIA 004310.11 (TIA 4310.11)— Tractor-Implement Automation™, Malfunction
The diagnostic trouble code is generated if the come-home mode is activated for a tractor with AutoPowr/IVT transmission™. This deactivates all functions of the Tractor-Implement Automation™.

TIA 004310.14 (TIA 4310.14)— Tractor-Implement Automation™ Deactivated
The diagnostic trouble code is triggered when the Tractor Implement Automation™ detects that the operator is no longer present for 7 seconds or more.

TIA 520283.14 — INFORMATION FOR OPERATOR: Move Reverse Drive Lever to Neutral Position
The diagnostic trouble code is triggered when the reverse drive lever is in the forward position but the Tractor Implement Automation™ is not yet ready to start. For a restart the reverse drive lever must be in the neutral position and then put back into the forward position.

TIA 522390.09 — Incorrect CAN BUS Message, Information from Implement
The diagnostic trouble code is issued when non valid information is received from the implement via the CAN BUS implement.

TIA 522390.11 — Tractor-Implement Automation™, Malfunction
The diagnostic trouble code is generated if the come-home mode is activated for a tractor with AutoPowr/IVT transmission™. This deactivates all functions of the Tractor-Implement Automation™.

TIA 522431.11 — Control Software Internal Fault
This diagnostic trouble code is generated if an electronic malfunction is registered in the control software. Reaction of the control software: Limited or no function of the control software.

TIA 522652.02 — Control Software Internal Fault
This diagnostic trouble code is generated if there was an error when reading the internal module (EEPROM).
Reaction of the control software: Limited or no function of the control software.

TIA 523438.02 — Control Software, Internal Fault
The diagnostic trouble code is generated if there was an error when reading the internal module (EEPROM).
Control software response: Limited or no function of the control software.

TIA 523953.02 — Potentiometer for Speed Control Lever, Voltages at Channel 1 and Channel 2 not in the Correct Ratio
This diagnostic trouble code is generated if the control software detects a mismatch between the output signals of the potentiometer on the speed control lever. The voltage at channel 1 must be double the voltage of channel 2. In its active state, this diagnostic trouble code also generates a diagnostic trouble code at the AIC control software.
Reaction of the control software: Limited or no function of the transmission.

TIA 523956.31 — INFORMATION FOR OPERATOR: Engine Off – Reverse Drive lever Still in Forward or Reverse Position
This information for the operator (diagnostic trouble code) is generated if the engine has shut down while the ignition is still switched on and the reverse drive lever is still in the position for forward or reverse. For restarting, the reverse drive lever must be moved to neutral position or to corner park position.

TIA 523957.31 — INFORMATION FOR OPERATOR: Tractor Start with Reverse Drive Lever Not in Park Lock or Neutral Position
This information for the operator (diagnostic trouble code) is generated if a start procedure occurs while the reverse drive lever is neither in the park lock nor in the neutral position. For a restart, the reverse drive lever has to be moved to the neutral position or to the corner park lock position.

TIA 523959.31 — Fault at Transmission
This diagnostic trouble code is generated if the control software fails to detect tractor motion even though all the preconditions for motion are met. In its active state, this fault also generates a diagnostic trouble code at the PTA control software.
Reaction of the control software: Limited or no function of the control software.

TIA 523960.31 — INFORMATION FOR OPERATOR: Forward or Reverse Position Preselected without Valid Operator Presence Signal
This information for the operator (diagnostic trouble code) is generated if forward or reverse position has been preselected, even although there is not any valid signal to indicate that the operator is present (operator on seat, clutch or brake pedals depressed).

TIA 523961.02 — Park Lock cannot be Disengaged
This diagnostic trouble code is generated if there is a park lock engagement signal at the control software, even though the reverse drive lever is not in park lock position. However, this diagnostic trouble code may also be generated by mistake during transmission calibration.
Reaction of the control software: Limited or no function of the park lock.

TIA 523961.07 — Park Lock, Fault
This diagnostic trouble code is generated under the following conditions:
XXX – If the park lock does not engage, even though the TIA control software commands the park lock position and the tractor’s ground speed is such that engagement is possible.
XXX – If a ground speed signal is present, even though the park lock position is commanded and the TIA control software has received confirmation that the park lock is engaged.

TIA 523961.12 — Park Lock, Malfunction (Ground Speed Detected with Park Lock Engaged)
This diagnostic trouble code is generated if the TIA control software detects a ground speed of more than 0.1 km/h (0.06 mph) for longer than 0.7 seconds after engaging the park lock.
Reaction of the control software: Limited or no function of the park lock.

TIA 523962.31 — Front-Wheel 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 front-wheel drive is engaged:
– Difference between front-wheel drive axle speed and transmission output speed above 4% for more than 3 seconds.
– Front-wheel drive axle speed below/at 200 rpm at a ground speed of more than 0.7 km/h (0.4 mph).
Reaction of the control software: Limited or no function of the transmission.

TIA 523966.11 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Restart the Engine
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home feature in COME HOME position). The operator is informed that he should restart the engine if he wants to re-activate the come-home function.

TIA 523966.14 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Select Direction of Travel
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home 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 come-home function.

TIA 523966.31 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Select Neutral or Park Lock Position
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home feature in COME HOME position). The operator is informed that he should move the reverse drive lever to neutral or park lock position to gain access to the next stage of the come-home function.

TIA 523967.02 — Sensor Unit for Speed Control Lever, Malfunction in Speed Band 1
This diagnostic trouble code is generated if there is a mismatch between the signals of speed band 1 and of the potentiometer on the speed control lever. The signal of speed band 1 is received, even though the speed control lever is set to speed band 2.

TIA 524020.31 — INFORMATION FOR OPERATOR: Reverse Drive Lever in Forward or Reverse Position During Start-Up
This information for the operator (diagnostic trouble code) is generated if the reverse drive lever is in the position for forward or reverse while the tractor is being started or the ignition is being turned on.

TIA 524032.01 — Reverse Drive Lever, Forward or Reverse Position and Power Zero Position Faulty
This diagnostic trouble code is generated if the signal for forward or reverse position or Power Zero position is present even though the reverse drive lever is not in any of these positions.
Reaction of the control software: Limited or no function of the reverse drive lever.

TIA 524032.04 — Reverse Drive Lever, Forward or Reverse Position Faulty
This diagnostic trouble code is generated if the signal for forward or reverse position is present even though the reverse drive lever is not in either of these positions.
Reaction of the control software: Limited or no function of the reverse drive lever.

TIA 524109.19 — Incorrect CAN BUS Message, Transmission Output Speed from PTA Control Software and PLC Control Software
This diagnostic trouble code is generated if the PTA control software and the PLC control software 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 TIA control software. In its active state, this fault also generates a diagnostic trouble code at the PTA control software. These diagnostic trouble codes take priority.
Reaction of the control software: Limited or no function of the control software.

TIA 524173.02 — Clutch Pedal Potentiometer, Voltages at Channel 1 and Channel 2 not in the Correct Ratio
This diagnostic trouble code is generated if the control software detects a mismatch between the output signals of clutch pedal potentiometer. The voltage at channel 1 has to be double the voltage of channel 2.
Reaction of the control software: Limited or no function of the transmission.

TIA 524173.07 — Clutch Pedal Potentiometer, Adjustment Error
This diagnostic trouble code is generated under the following conditions:
– If, with a faulty clutch pedal potentiometer, the reverse drive lever is in forward or reverse position and the clutch pedal is depressed.
– If, with a faulty clutch pedal potentiometer, the reverse drive lever is in forward or reverse position and the enable pressure sensor detects a pressure lower than system pressure.
Reaction of the control software: Limited or no function of the control software.

TIA 524180.07 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Press the Clutch Pedal to Stop
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home feature in COME HOME position). The operator is informed that he should depress the clutch pedal if he wants to stop the tractor.

TIA 524180.14 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Depress the Clutch Pedal Fully
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home 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 come-home function.

TIA 524180.31 — INFORMATION FOR OPERATOR: Tractor in Come-Home Mode, Release Clutch Pedal
This operator information (diagnostic trouble code) is generated if the come-home mode is activated (connector for come-home 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 come-home function.

TIA 524188.01 — Control Software Internal Fault
This diagnostic trouble code is generated if the control software internally detects that too much time has elapsed.
Reaction of the control software: Limited or no function of the control software.

TIA 524190.14 — INFORMATION FOR OPERATOR: Anti-Jack-Knife Control Activated
This operator information (diagnostic trouble code) is generated if the TIA control software has activated the antijack-knife control in response to a change in ratio of the front and rear axle operating speeds (front-wheel drive disengaged).

TIA 524193.14 — INFORMATION FOR OPERATOR: Transmission Warm-up Routine Active
This operator information (diagnostic trouble code) is generated if the PTA control software detects that the transmission oil temperature is too cold for operation. Transmission oil temperature has to be increased.

TIA 524254.31 — INFORMATION FOR OPERATOR: Transmission Warm-up Routine cannot be Activated, Park Lock must be Engaged
This operator information (diagnostic trouble code) is generated if the PTA control software detects a transmission oil temperature that is too cold for the tractor to operate. However, the transmission’s warm-up routine cannot be activated until the reverse drive lever has been moved to its park lock position.

TIA 524254.02 — Transmission Enable Relay, Fault
The diagnostic trouble code is generated if the control software detects a problem in the circuit of the transmission enable relay. This indicates a defective relay, or a problem with the ground circuit, or with the circuit of the control lead.
Control software response: Limited or no function of the transmission.

TIA 524264.02 — Control Software Internal Fault
This diagnostic trouble code is generated if an electronic malfunction is registered in the control software.
Reaction of the control software: Limited or no function of the control software.