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(SSU) Diagnostic Trouble Codes
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Diagnostic Trouble Code
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Display
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Solution
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SSU 84.9
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AutoTrac System Inoperable
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Chassis control unit communication fault. Restart engine to
attempt vehicle recovery.
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SSU 168.3
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AutoTrac System Inoperable
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Steering system control unit supply voltage high. Restart engine
to attempt vehicle recovery.
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SSU 168.4
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AutoTrac System Inoperable
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Steering system control unit supply voltage low. Reduce electrical
load or increase engine RPM. Power down and check fuse.
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SSU 177.9
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AutoTrac System Inoperable
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Chassis control unit communication fault. Restart engine to
attempt vehicle recovery.
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SSU 517.9
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AutoTrac System Inoperable
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GPS receiver or tractor equipment control unit communication
fault. Restart engine to attempt vehicle recovery.
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SSU 524.9
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AutoTrac System Inoperable
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Transmission control unit communication fault. Restart engine
to attempt vehicle recovery.
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SSU 628.2
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AutoTrac System Inoperable
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Steering system fault. Restart engine to attempt vehicle recovery.
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SSU 628.12
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AutoTrac System Inoperable
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Steering control unit is programming
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SSU 629.12
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AutoTrac System Inoperable
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Steering control unit fault. Restart engine to attempt vehicle
recovery.
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SSU 630.13
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AutoTrac System Not Calibrated
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Calibration fault.
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SSU 1079.3
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AutoTrac System Inoperable
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Steering system supply voltage high. Restart engine to attempt
vehicle recovery.
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SSU 1079.4
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AutoTrac System Inoperable
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Wheel angle sensor supply voltage low. Restart engine to attempt
vehicle recovery.
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SSU 1504.9
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AutoTrac System Inoperable
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Cab control unit communication fault. Restart engine to attempt
vehicle recovery.
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SSU 1504.14
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Operator Not In Seat
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Operator out of seat. Return to seated position.
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SSU 1807.2
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AutoTrac System Inoperable
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Steering wheel position sensors fault.
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SSU 1807.3
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AutoTrac System Inoperable
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Steering wheel position sensor supply voltage high. Restart
engine to attempt vehicle recovery.
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SSU 1807.4
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AutoTrac System Inoperable
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Steering wheel position sensor supply voltage low. Restart
engine to attempt vehicle recovery.
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SSU 1807.5
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AutoTrac System Inoperable
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Steering wheel position sensor circuit current low. Restart
engine to attempt vehicle recovery.
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SSU 1807.6
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AutoTrac System Inoperable
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Steering wheel position sensor circuit current high. Restart
engine to attempt vehicle recovery.
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SSU 1807.10
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AutoTrac System Inoperable
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Steering wheel position sensor fault.
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SSU 1807.14
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AutoTrac System Inoperable
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Steering wheel position sensor fault.
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SSU 1865.9
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AutoTrac System Inoperable
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Cab load center communication fault. Restart engine to attempt
vehicle recovery.
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SSU 522273.0
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AutoTrac System Inoperable
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Steering system control voltage high. Restart engine to attempt
vehicle recovery.
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SSU 522273.1
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AutoTrac System Inoperable
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Steering system control command voltage low. Restart engine
to attempt vehicle recovery.
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SSU 522387.7
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AutoTrac System Inoperable
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Steering component fault.
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SSU 522394.9
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AutoTrac System Inoperable
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GPS receiver or tractor equipment control unit communication
fault. Restart engine to attempt vehicle recovery.
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SSU 522451.0
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AutoTrac System Inoperable
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Wheel angle sensor voltage high.
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SSU 522451.1
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AutoTrac System Inoperable
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Wheel angle sensor voltage low.
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SSU 522451.14
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AutoTrac System Inoperable
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Wheel angle sensor fault.
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SSU 523349.9
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AutoTrac System Inoperable
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Armrest control unit communication fault. Restart engine to
attempt vehicle recovery.
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SSU 523651.2
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AutoTrac System Inoperable
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Steering control unit fault. Restart engine to attempt vehicle
recovery.
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SSU 523698.9
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AutoTrac System Inoperable
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GreenStar display communication fault.
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SSU 523768.2
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AutoTrac System Not Calibrated
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Steering control unit calibration fault. Restart engine to attempt
vehicle recovery.
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SSU 523768.9
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AutoTrac System Inoperable
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Front suspension control unit communication fault. Restart engine
to attempt vehicle recovery.
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SSU 523789.2
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AutoTrac System Inoperable
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Wheel angle sensor not detected. Restart engine to attempt vehicle
recovery.
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SSU 523795.2
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523795.11
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523795.12
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AutoTrac System Inoperable
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Steering component or harness fault.
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SSU 523795.13
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523810.0
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AutoTrac System Inoperable
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Steering valve supply voltage high.
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SSU 523810.1
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AutoTrac System Inoperable
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Steering valve supply voltge low.
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SSU 523821.2
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AutoTrac System Inoperable
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Vehicle identification fault or incorrect harness connection.
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SSU 523822.2
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AutoTrac System Inoperable
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Flow meter sensor fault.
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SSU 523822.5
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AutoTrac System Inoperable
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Flow meter sensor circuit current low.
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SSU 523822.6
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AutoTrac System Inoperable
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Flow meter sensor circuit current high.
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SSU 523822.7
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523822.8
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AutoTrac System Inoperable
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Flow meter sensor fault.
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SSU 523822.10
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AutoTrac System Inoperable
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Vehicle steering detected without steering wheel movement.
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SSU 523822.12
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523822.14
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AutoTrac System Inoperable
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Vehicle steering not detected with steering wheel movement.
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SSU 523824.3
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AutoTrac System Inoperable
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Steering wheel position sensor supply voltage high.
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SSU 523824.4
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AutoTrac System Inoperable
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Steering wheel position sensor supply voltage low.
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SSU 523824.5
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AutoTrac System Inoperable
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Steering wheel position sensor circuit current low.
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SSU 523824.6
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AutoTrac System Inoperable
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Steering wheel position sensor circuit current high.
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SSU 523824.10
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AutoTrac System Inoperable
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Steering wheel position sensor fault.
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SSU 523824.14
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AutoTrac System Inoperable
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Steering wheel position sensor fault.
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SSU 523826.0
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AutoTrac System Inoperable
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Wheel angle sensor voltage high.
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SSU 523826.1
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AutoTrac System Inoperable
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Wheel angle sensor voltage low.
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SSU 523826.2
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523826.7
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523826.10
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AutoTrac System Inoperable
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Vehicle steering detected without steering wheel movement.
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SSU 523826.12
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AutoTrac System Inoperable
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Steering control unit calibration fault.
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SSU 523826.14
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AutoTrac System Inoperable
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Vehicle steering not detected with steering wheel movement.
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SSU 524221.9
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AutoTrac System Inoperable
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GPS receiver yaw rate communication fault.
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SSU 600006.31
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AutoTrac System
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Vehicle controls not operating correctly.
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