July 2019 Service and Repair ManualControl System Fault CodesPart No. 1286829GT S-40 XC • S-45 XC • S-40 TraX • S-45 TraX 85Control System F ault C odes (softwar e v ersion H and up)ID Component ID Name Cause Effect Solution1 Engine CanBus13 NotdetectedEngine CANBUSCAN+ or CAN-shorted to supply.Disable engine startfor tier 4F engines*Verify with a voltmeter that CAN+and CAN- lines are not shorted.*Measure the resistance betweenD228CAN+ (YL, TCON J9-3) andD228CAN- (GR, TCON J9-4); shouldbe between 55 and 65 ohms.* D228CAN+ (YL, TCON J9-3)should be between 1V and 5V.* D228CAN- (GR, TCON J9-4)should be between 1V and 5V.Remove short(s) and cycle power.7 EngineWarning21 Fault The engine hastriggered theEngine WarningLamp condition.Machine willfunction as normal.* Check the engine fault codes withan engine diagnostic tool.8 Engine Stop 21 Fault The engine hastriggered theEngine Stop Lampcondition.Control system willnot allow enginerestart until powercycle. Engine maystop itself,depending on theengine option.* Check the engine fault codes withan engine diagnostic tool.Note: The control system shuts offthe engine immediately uponreceiving this fault from the engine.10 GroundControlsEngine StartSwitch27 Active atstartupEngine start buttonheld at startup.Engine start isdisabledRelease engine start button, checkDISCON overlay and ribbon cable ifissue persists.11 PlatformControlsEngine StartSwitch27 Active atstartupPlatform controlsengine start switchactive at startup.Engine start switchwill not operate.*Verify with a voltmeter that theEngine Start Toggle Switch (TS2) isoperating properly.* C33STR (BK, PCON J16-3) shouldbe 0 V with the switch OFF and 12 Vwith the switch ON.*Cycle power to allow the machine tore-test the fault.12 MachineCAN Bus13 NotdetectedMachine CANBUSCAN+ or CAN-shorted to supplyMachine will not befunctional.*Verify with a voltmeter that CAN+and CAN- lines are not shorted.*Measure the resistance betweenD82CAN+ (YL, TCON J5-3) andD81CAN- (GR, TCON J5-4); shouldbe between 55 and 65 ohms.*D81CAN+ (YL, TCON J5-3) shouldbe between 1V and 5V.*D81CAN- (GR, TCON J5-4) shouldbe between 1V and 5V.*Remove short(s) and cycle power.