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Cab Control Unit (CAB) Diagnostic Trouble
Codes
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Diagnostic Trouble Code
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Display
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Solution
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CAB 91.2
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Operator Controls
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Foot throttle sensor circuit voltage fault. Use hand throttle.
Restart engine to attempt vehicle recovery.
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CAB 91.3
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Operator Controls
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Foot throttle sensor circuit voltage high. Use hand throttle.
Restart engine to attempt vehicle recovery.
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CAB 91.4
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Operator Controls
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Foot throttle sensor circuit voltage low. Use hand throttle.
Restart engine to attempt vehicle recovery.
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CAB 158.3
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Electrical System Voltage High
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Cab control unit supply voltage high. Restart engine to attempt
vehicle recovery.
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CAB 158.4
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Electrical System Voltage Low
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Cab control unit supply voltage low. Reduce electrical load
or increase engine RPM to attempt vehicle recovery.
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CAB 237.2
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Identification System
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Vehicle identification numbers do not match between control
units.
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CAB 237.14
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Identification System
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Vehicle identification fault.
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CAB 237.31
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Identification System
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Vehicle identification fault.
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CAB 628.2
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Programming
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Vehicle controls not operating correctly.
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CAB 628.12
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Programming
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Cab control unit programming in progress.
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CAB 629.12
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Electrical System
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Cab control unit fault. Restart engine to attempt vehicle recovery.
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CAB 1079.3
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Operator Controls
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Cab control unit sensor supply voltage high. Restart engine
to attempt vehicle recovery.
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CAB 1079.4
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Operator Controls
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Cab control unit sensor supply voltage low. Restart engine to
attempt vehicle recovery.
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CAB 523922.31
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Secondary Brake On
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Disengage brake or return vehicle to Neutral or Park.
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CAB 1504.8
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Operator Controls
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Seat switch circuit fault.
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CAB 2876.2
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Operator Controls
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Turn signal switch fault. Both signals activated. Restart engine
to attempt vehicle recovery.
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CAB 523839.2
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Operator Controls
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Secondary brake switch fault. Restart engine to attempt vehicle
recovery.
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CAB 523839.13
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Operator Controls
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Secondary brake calibration fault.
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CAB 523841.3
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Operator Controls
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Secondary brake sensor circuit voltage high. Cycle brake or
restart engine to attempt vehicle recovery.
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CAB 523841.4
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Operator Controls
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Secondary brake sensor circuit voltage low. Cycle brake or restart
engine to attempt vehicle recovery.
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CAB 523908.2
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Operator Controls
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Rear PTO switch fault. Cycle PTO switch or restart engine to
attempt vehicle recovery.
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CAB 524016.4
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Operator Controls
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Cab control unit supply voltage low. Reduce electrical load
or increase engine RPM to attempt vehicle recovery.
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CAB 524017.13
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Operator Controls
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Reverser lever calibration fault.
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CAB 524017.31
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Operator Controls
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Left hand reverser fault.
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CAB 524018.31
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Operator Controls
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Reverser lever fault.
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CAB 524019.31
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Operator Controls
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Reverser lever fault.
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CAB 524020.31
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Lever not in park
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Reverser lever not in Neutral or Park during power up. Return
lever to Park or Neutral.
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CAB 524021.31
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Operator Controls
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Left hand reverser lever circuit fault. Return to Park. Restart
engine to attempt vehicle recovery.
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CAB 524166.2
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Operator Controls
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Right brake switch circuit fault.
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CAB 524166.3
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Operator Controls
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Right brake circuit voltage high. Restart engine to attempt
vehicle recovery.
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CAB 524166.4
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Operator Controls
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Right brake circuit voltage low. Restart engine to attempt vehicle
recovery.
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CAB 524166.8
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Operator Controls
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Right brake pedal out of adjustment.
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CAB 524166.13
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Operator Controls
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Right brake pedal calibration fault.
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CAB 524169.2
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Operator Controls
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Left brake switch circuit fault.
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CAB 524169.3
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Operator Controls
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Left brake circuit voltage high. Restart engine to attempt vehicle
recovery.
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CAB 524169.4
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Operator Controls
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Left brake circuit voltage low. Restart engine to attempt vehicle
recovery.
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CAB 524169.8
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Operator Controls
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Left brake pedal out of adjustment.
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CAB 524169.13
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Operator Controls
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Left brake pedal calibration fault.
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CAB 524173.2
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Operator Controls
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Clutch pedal sensor circuit fault.
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CAB 524173.3
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Operator Controls
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Clutch pedal sensor circuit voltage high. Restart engine to
attempt vehicle recovery.
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CAB 524173.4
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Operator Controls
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Clutch pedal sensor circuit voltage low. Restart engine to attempt
vehicle recovery.
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CAB 600006.31
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Operator Controls
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Vehicle controls not operating correctly.
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