ATC Control Unit – The ATC (Automatic Temperature Control Unit) is responsible for controlling the ClimaTrak automatic air conditioning system.
John Deere ATC fault codes / John Deere ATC diagnostic trouble codes
NOTE:This page only indicates the meaning of the fault codes. For complete troubleshooting information, see the technical manuals.
ATC 000168.03 ( ATC 168.03 )— Control Unit, Supply Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a supply voltage in excess of 16 volts (pin 22, lead 0402, ELX).
ATC 000168.04 ( ATC 168.04 )— Control Unit, Supply Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures a supply voltage of less than 9 volts (pin 22, lead 0402, ELX).
ATC 000170.03 ( ATC 170.03 )— B127 Sensor for Inside Air Temperature, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for inside air temperature sensor (B127, lead 2007). This indicates that the circuit is shorted to a supply lead or is open.
ATC 000170.04 ( ATC 170.04 )— B127 Sensor for Inside Air Temperature, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for inside air temperature sensor (B127, lead 2007). This indicates a short to ground in the circuit.
ATC 000628.12 ( ATC 628.12 )— Control Unit Internal Fault
This diagnostic trouble code is triggered if an electronic malfunction is registered in the control unit.
ATC 000630.02 ( ATC 630.02 )— Control Unit Internal Fault
This diagnostic trouble code is triggered if the control unit detects an EEPROM error.
ATC 000639.14 ( ATC 639.14 )— Vehicle CAN BUS, Very High Error Rate
The 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 vehicle CAN BUS.
ATC 000871.03 ( ATC 871.03 )— B130 Sensor for Refrigerant Pressure, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for refrigerant pressure sensor (B130, lead 2019). This indicates a short to a supply lead somewhere in the circuit.
ATC 000871.04 ( ATC 871.04 )— B130 Sensor for Refrigerant Pressure, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for refrigerant pressure sensor (B130, lead 2019). This indicates that circuit is shorted to ground or is open.
ATC 000871.13 ( ATC 871.13 )— B130 Sensor for Refrigerant Pressure, Refrigerant Pressure Out of Valid Range Low
This diagnostic trouble code is triggered if the control unit measures less than 1.7 bar (24.6 psi) at the refrigerant pressure sensor (B130, lead 2019). This indicates a problem with the refrigerant.
ATC 000876.00 ( ATC 876.00 )— M02 Compressor Clutch, Current Overload Protection Active at Power Module (HF) PC6
This diagnostic trouble code is triggered if power module (HF) PC6 measures a total amperage in excess of 40 amps at the A1, C1 and D1 outputs. The following functions are monitored together and may trigger additional diagnostic trouble codes that affect the current overload protection:
• Output A1: M02 compressor clutch, diagnostic trouble code ATC 000876.00.
• Output C1: E27 beacon light, diagnostic trouble code BCU 002386. 00.
• Output D1: E20/R and E20/L worklights on cab frame (right and left), diagnostic trouble code BCU 523691.00.
• Output D1: E36R and E36L xenon (HID) worklights on cab frame (right and left), diagnostic trouble code BCU 523691.00.
This indicates a short to ground or a defective component in one of the monitored circuits.
ATC 000876.01 ( ATC 876.01 )— M02 Compressor Clutch, Power Supply Fault at Power Module (HF) PC6
This diagnostic trouble code is generated if, when compressor clutch (M02) is switched on, power module (HF) PC6 measures less than 3 volts at the supply voltage for the compressor clutch output (lead 0732).
ATC 000876.03 (ATC 876.03)— Compressor Clutch Circuit Voltage High
Code caused by: The voltage in the A/C compressor clutch circuit is too high.
ATC 000876.04 ( ATC 876.04 )— M02 Compressor Clutch On, Current Too High at Power Module (HF) PC6
This diagnostic trouble code is triggered if, when compressor clutch (M02) is switched on, power module (HF) PC6 measures in excess of 30 amps at the compressor clutch output (lead 2023). This indicates a short to ground in the circuit.
ATC 000876.05 ( ATC 876.05 )— M02 Compressor Clutch On, No Current Present at Power Module (HF) PC6
This diagnostic trouble code is triggered if, when compressor clutch (M02) is switched on, power module (HF) PC6 measures less than 350 mA at the compressor clutch output (lead 2023). This indicates that the circuit is open.
ATC 000876.09 ( ATC 876.09 )— M02 Compressor Clutch, Incorrect CAN BUS Message from ATC (Power Module (HF) PC6)
This diagnostic trouble code is generated if there is a problem transferring data between power module (HF) PC6 and the ATC control unit. Reception of one, several or all of the CAN messages transmitted by the ATC to power module (HF) PC6 is intermittent or nonexistent (intermittent reception could be due to a loose wire).
ATC 000876.10 (ATC 876.10)— A/C Clutch Overdrive
Code caused by: The compressor clutch of the air conditioner is being activated more than six times per minute
ATC 000876.12 ( ATC 876.12 )— M02 Compressor Clutch Off, Current Present at Power Module (HF) PC6
This diagnostic trouble code is triggered if, with compressor clutch (M02) switched off, power module (HF) PC6 measures in excess of 1 amp at the compressor clutch output (lead 2023). This indicates a short in the circuit or an internal fault in the power module.
ATC 000876.14 (ATC 876.14)— Compressor Cuts Out Due to Motor Overheats
Code Caused By: The Automatic Temperature Control (ATC) unit disengages the A/C compressor clutch due to excessive engine heating.
Control unit response: Limited temperature control
ATC 000876.19 ( ATC 876.19 )— M02 Compressor Clutch, Incorrect CAN BUS Message (Power Module (HF) PC6)
This diagnostic trouble code is triggered if the output for switching the compressor clutch is energized by more than one control unit.
ATC 000923.00 ( ATC 923.00 )— M07/M10 Fan Motor, Current Overload Protection Active at Power Module (HF) PC6
This diagnostic trouble code is triggered if power module (HF) PC6 measures a total amperage in excess of 40 amps at one of the fan motor outputs (B1 and/or C3). This indicates a short to ground or a defective component in one of the monitored circuits.
ATC 000923.01 ( ATC 923.01 )— M07/M10 Fan Motor, Power Supply Fault at Power Module (HF) PC6
This diagnostic trouble code is generated if, when fan motors (M07 and M10) are switched on, power module (HF) PC6 measures less than 3 volts at the supply voltage for one or both fan motor outputs. This indicates a problem with the supply voltage for the fan motor outputs (lead 0752 and/or lead 0762).
ATC 000923.03 (ATC 923.03)— Circulation Blower Motor Circuit High Voltage
Code Caused By: The circuit voltage between the circulation blower motor and the blower motor controller is too high.
ATC 000923.04 ( ATC 923.04 )— M07/M10 Fan Motor On, Current Too High at Power Module (HF) PC6
This diagnostic trouble code is triggered if, when fan motors (M07 and M10) are switched on, power module (HF) PC6 measures in excess of 30 amps at one or both fan motor outputs (lead 2043 and/or lead 2047). This indicates a short to ground in the relevant circuit.
ATC 000923.09 ( ATC 923.09 )— M07/M10 Fan Motor, Incorrect CAN BUS Message from ATC (Power Module (HF) PC6)
This diagnostic trouble code is generated if there is a problem transferring data between power module (HF) PC6 and the ATC control unit. Reception of one, several or all of the CAN messages transmitted by the ATC to power module (HF) PC6 is intermittent or nonexistent (intermittent reception could be due to a loose wire).
ATC 000923.12 ( ATC 923.12 )— M07/M10 Fan Motor Off, Current Present at Power Module (HF) PC6
This diagnostic trouble code is triggered if, with fan motors (M07 and M10) switched off, power module (HF) PC6 measures in excess of 1 amp at one or both fan motor outputs (lead 2043 and/or 2047). This indicates a short in the circuit or an internal fault in the power module. The diagnostic trouble can be triggered in addition to diagnostic trouble code ATC 000923.01, if there is a problem with the voltage supply for the fan motor outputs. Diagnostic trouble code ATC 000923.01 must be processed first.
ATC 000923.19 ( ATC 923.19 )— M07/M10 Fan Motor, Incorrect CAN BUS Message (Power Module (HF) PC6)
This diagnostic trouble code is triggered if the outputs for switching the fan motors are energized by more than one control unit.
ATC 001079.03 ( ATC 1079.03 )— 5volt Power Supply, Voltage Too High
This diagnostic trouble code is triggered if the voltage measured at the positive lead (lead 2093) of the power supply to the 5volt components (defog sensor B143, refrigerant pressure sensor B130, heater valve B131 and motor for adjusting the air distribution flaps B132) is above 5 volts. This indicates that the circuit is shorted to a positive supply lead or there is an internal interruption at the control unit.
ATC 001079.04 ( ATC 1079.04 )— 5volt Power Supply, Voltage Too Low
This diagnostic trouble code is triggered if the voltage measured at the positive lead (lead 2093) of the power supply to the 5volt components (defog sensor B143, refrigerant pressure sensor B130, heater valve B131 and motor for adjusting the air distribution flaps B132) is less than 0.5 volts. This indicates a short to ground in the circuit.
ATC 001551.03 (ATC 1551.03)— Pressurizer Blower Motor Circuit Voltage High
Code caused by: The voltage in the A/C pressurizer blower motor circuit is too high.
ATC 001551.04 (ATC 1551.04)— Pressurizer Blower Motor Circuit Voltage Low
Code caused by: The voltage in the A/C pressurizer blower motor circuit is too low.
ATC 001546.03 ( ATC 1546.03 )— B131 Heater Valve (Potentiometer), Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input of the potentiometer (heater valve B131, lead 2038). This indicates that the circuit is shorted to a supply lead or is open.
ATC 001546.04 ( ATC 1546.04 )— B131 Heater Valve (Potentiometer), Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for the heater valve positioning potentiometer (B131, lead 918). This indicates a short to ground in the circuit.
ATC 001547.03 ( ATC 1547.03 )— B129 Sensor for Evaporator Core Temperature, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for evaporator core temperature sensor (B129, lead 2018). This indicates that the circuit is shorted to a supply lead or is open.
ATC 001547.04 ( ATC 1547.04 )— B129 Sensor for Evaporator Core Temperature, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for evaporator core temperature sensor (B129, lead 2018). This indicates a short to ground in the circuit.
ATC 001548.03 ( ATC 1548.03 )— B128 Sensor for Outlet Temperature, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for outlet temperature sensor (B128, lead 2009). This indicates that the circuit is shorted to a supply lead or is open.
ATC 001548.04 ( ATC 1548.04 )— B128 Sensor for Outlet Temperature, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for outlet temperature sensor (B128, lead 2009). This indicates a short to ground in the circuit.
ATC 001549.03 ( ATC 1549.03 )— B131 Heater Valve (Adjusting Motor), Voltage Too High
This diagnostic trouble code is triggered if the control unit measures excessive voltage at motor connecting leads 2016 and/or 2027 of heater valve (B131). This indicates that the circuit is shorted.
ATC 001549.04 ( ATC 1549.04 )— B131 Heater Valve (Adjusting Motor), Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures too low a voltage at motor connecting leads 2016 and/or 2027 of heater valve (B131). This indicates that the circuit is grounded.
ATC 001549.07 ( ATC 1549.07 )— B131 Heater Valve, Fault
This diagnostic trouble code is triggered if the control unit receives a valid position signal from heater valve potentiometer (B131), but the heater valve cannot be moved to its desired position via the motor’s connecting leads. This indicates a mechanical fault at the heater valve or an open line at the motor’s connecting lines.
ATC 001549.13 ( ATC 1549.13 )— B131 Heater Valve, Not Calibrated This diagnostic trouble code is triggered if the heater valve is found to have an invalid calibration, or is not yet calibrated.
ATC 001552.03 ( ATC 1552.03 )— Temperature Control, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input of the temperature control. This indicates that the internal circuit of the control unit is shorted to a supply lead or is open.
ATC 001552.04 ( ATC 1552.04 )— Temperature Control, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input of the temperature control. This indicates a short to ground in the internal circuit of the control unit.
ATC 001553.03 ( ATC 1553.03 )— Fan Speed Control, Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input of the fan speed control. This indicates that the internal circuit of the control unit is shorted to a supply lead or is open.
ATC 001553.04 ( ATC 1553.04 )— Fan Speed Control, Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input of the fan speed control. This indicates a short to ground in the internal circuit of the control unit.
ATC 002000.09 ( ATC 2000.09 )— Incorrect CAN BUS Message, Coolant Temperature from ECU
This diagnostic trouble code is generated when a data transfer problem occurs between the ECU and ATC. Reception of the CAN message regarding coolant temperature is intermittent or nonexistent (intermittent reception could be due to a loose wire).
ATC 002156.09 ( ATC 2156.09 )— Incorrect CAN BUS Message, Information from Power Module (HF) PC6
This diagnostic trouble code is generated if there is a problem transferring data between power module (HF) PC6 and the ATC control unit. Reception of one, several or all of the CAN messages transmitted by power module (HF) PC6 is intermittent or nonexistent (intermittent reception could be due to a loose wire).
ATC 522343.00 — R17 Resistor at Heated Rear Window, Current Overload Protection Active at Power Module (HF) PC6
This diagnostic trouble code is triggered if power module (HF) PC6 measures an amperage in excess of 40 amps at the output for heated rear window resistor (R17). This indicates that circuit is shorted to ground or that there is a defective component in the circuit.
ATC 522343.01 — R17 Resistor at Heated Rear Window, Power Supply Fault at Power Module (HF) PC6
This diagnostic trouble code is generated if, when rearwindow heater is switched on, power module (HF) PC6 measures less than 3 volts at the supply voltage for the rearwindow heater output (lead 0742).
ATC 522343.04 — R17 Resistor at Heated Rear Window On, Current Too High at Power Module (HF) PC6
This diagnostic trouble code is triggered if, when rearwindow heater is switched on, power module (HF) PC6 measures in excess of 30 amps in lead 2031. This indicates a short to ground in the circuit.
ATC 522343.05 — R17 Resistor at Heated Rear Window On, No Current Present at Power Module (HF) PC6
This diagnostic trouble code is triggered if, when rearwindow heater is switched on, power module (HF) PC6 measures less than 350 mA at the output of resistor (R17; for heated rear window) (lead 2031). This indicates that the circuit is open.
ATC 522343.09 — R17 Resistor at Heated Rear Window, Incorrect CAN BUS Message from ATC (Power Module (HF) PC6)
This diagnostic trouble code is generated if there is a problem transferring data between power module (HF) PC6 and the ATC control unit. Reception of one, several or all of the CAN messages transmitted by the ATC to power module (HF) PC6 is intermittent or nonexistent (intermittent reception could be due to a loose wire).
ATC 522343.12 — R17 Resistor at Heated Rear Window Off, Current Present at Power Module (HF) PC6
This diagnostic trouble code is triggered if, with rearwindow heater switched off, power module (HF) PC6 measures in excess of 1 amp at the output of resistor (R17; for heated rear window) (lead 2031). This indicates a short in the circuit or an internal fault in the power module.
ATC 522343.19 — R17 Resistor at Heated Rear Window, Incorrect CAN BUS Message (Power Module (HF) PC6)
This diagnostic trouble code is triggered if the output for switching resistor (R17; for heated rear window) is energized by more than one control unit.
ATC 523848.03 — B132 Adjusting Motor for Air Distribution (Potentiometer), Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input of the potentiometer for the position of the air distribution flaps (adjusting motor B132 for air distribution, lead 2017). This indicates that the circuit is shorted to a supply lead or is open.
ATC 523848.04 — B132 Adjusting Motor for Air Distribution (Potentiometer), Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input of the potentiometer for the position of the air distribution flaps (adjusting motor B132 for air distribution, lead 2017). This indicates a short to ground in the circuit.
ATC 523848.05 — B132 Adjusting Motor for Air Distribution, Current Too Low
This diagnostic trouble code is triggered if the control unit measures too low an amperage at adjusting motor connecting leads 2028 and/or 2029. This indicates that the circuit is shorted.
ATC 523848.06 — B132 Adjusting Motor for Air Distribution, Current Too High
This diagnostic trouble code is triggered if the control unit measures too high an amperage at adjusting motor connecting leads 2028 and/or 2029. This indicates a short to ground in the circuit.
ATC 523848.07 — B132 Adjusting Motor for Air Distribution, Fault
This diagnostic trouble code is triggered if the control unit receives a valid position signal from the potentiometer of the air distribution adjusting motor, but the adjusting motor cannot be moved to its desired position via the motor’s connecting leads. This indicates a mechanical fault at the air distribution or an open line at the motor’s connecting lines.
ATC 523848.13 — B132 Adjusting Motor for Air Distribution, Not Calibrated
This diagnostic trouble code is triggered if the air distribution adjusting motor is found to have an invalid calibration, or is not yet calibrated.
ATC 523979.05 — S139 Switch for Heated Rear Window, Current Too Low
This diagnostic trouble code is triggered if the control unit measures too low an amperage at the signal input of the indicator light in the rearwindow heater switch (S139, lead 2021). This indicates an interruption in the circuit or, on tractors without the optional ”heated rea
ATC 523979.07 — S139 Switch for Heated Rear Window, Fault
This diagnostic trouble code is triggered if the control unit receives the engagement signal of the rearwindow heater switch for too long a period of time (S139, lead 2013). This indicates that the switch is jammed or defective, or that there is a problem in the circuit.
ATC 524202.03 — B126 Sensor for Ambient Air Temperature (at Rear), Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for the rear ambient air temperature sensor (B126, lead 2006). This indicates that the circuit is shorted to a supply lead or is open.
ATC 524202.04 — B126 Sensor for Ambient Air Temperature (at Rear), Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for the rear ambient air temperature sensor (B126, lead 2006). This indicates a short to ground in the circuit.
ATC 524203.03 — B125 Sensor for Ambient Air Temperature (at Front), Voltage Too High
This diagnostic trouble code is triggered if the control unit measures a voltage in excess of 5 volts at the signal input for the front ambient air temperature sensor (B125, lead 2001). This indicates that the circuit is shorted to a supply lead or is open.
ATC 524203.04 — B125 Sensor for Ambient Air Temperature (Front), Voltage Too Low
This diagnostic trouble code is triggered if the control unit measures 0 volts at the signal input for the front ambient air temperature sensor (B125, lead 2001). This indicates a short to ground in the circuit.
ATC 524219.02 — B143 Defog Sensor, Frequency out of Valid Range
This diagnostic trouble code is triggered if the control unit registers a frequency from defog sensor (B143, lead 2003) that is out of the valid frequency range (32.26 37.88 Hz).
ATC 524219.03 — B143 Defog Sensor, Voltage Too High
This diagnostic trouble code is triggered if the control unit registers a frequency at the signal input of defog sensor (B143, lead 2003) that indicates that the circuit is shorted to a supply lead or is open.
ATC 524219.04 — B143 Defog Sensor, Voltage Too Low
This diagnostic trouble code is triggered if the control unit registers a frequency at the signal input of defog sensor (B143, lead 2003) that indicates that the circuit is shorted to ground.
ATC 600006.13 — Diagnostic Trouble Code Not Known
This diagnostic trouble code is triggered by the CommandCenter (DTI) when the DTI receives an ATC 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 ATC diagnostic trouble code.