Reference information for self-troubleshooting for Caterpillar machines equipped with an electronic selfdiagnostic and engine management system.
Diagnostic codes are used to locate and repair faulty parts when servicing Caterpillar engines.
(CID) is the diagnostic trouble code, it indicates the number of a specific node, component or system fault.
1 Injector No.1 cylinder
2 Injector No.2 cylinder
3 Cylinder 3 injector
4 Injector No.4 cylinder
5 Injector No.5 cylinder
6 Injector No.6 cylinder
7 Cylinder No.7 injector
8 Cylinder Nozzle No.8
9 Cylinder Nozzle 9
10 Cylinder Nozzle No.10
11 Cylinder Nozzle 11
12 Cylinder Nozzle No.12
13 Cylinder No.1 injector
14 Cylinder No.14 Nozzle
15 Cylinder No.15 injector
16 Cylinder Nozzle 16
17 Fuel shut-off valve
18 Fuel control valve
19 Accelerator Bypass Valve
20 The device of change of a corner of an advancing of injection of fuel
21 Engine position sensor
22 Intake of the fuel injection
23 Reach drive
24 Rack position sensor
27 Drive turbocharger with variable geometry No. 1
28 Drive turbocharger with variable geometry No. 2
41 Power supply to the computer (electronic control unit) 8 V DC
42 Injector valve
70 Contact sensor of parking brake
71 Idling stop timer
75 hydraulic oil temperature sensor for steering system
81 Intake particle trap pressure sensor
82 Pressure sensor for pneumatic start system
84 Travel speed sensor
91 Accelerator pedal position (gas) sensor
94 Fuel Pressure Switch
95 Differential pressure sensor on the fuel filter
96 Fuel level sensor
98 Engine oil level sensor
99 Differential pressure sensor on engine oil filter
100 Engine oil pressure switch
101 Crankcase pressure sensor
102 Turbocharger Pressure Sensor
104 Turbocharger oil pressure sensor
Intake Manifold Temperature Sensor
106 Input air pressure sensor
109 Coolant pressure sensor. At the output of the engine
110 Engine Coolant Temperature Sensor
111 Coolant level sensor. Engine
112 Differential pressure sensor on the coolant filter. Engine
124 Transmission oil level
126 Differential pressure sensor on transmission oil filter
127 Transmission oil pressure sensor
138 Low Traction Mode Switch
139 tip tip electromagnet
140 tip tip electromagnet
141 Economy mode switch
142 Radiator cleaning door sensor
143 Pressure switch for neutral control unit
144 Reversing sound signal
145 Power supply circuit 12 V
146 Hitch mode switch
147 Clutch Pressure Sensor
148 Hydraulic system pressure sensor
149 Three-position electromagnet of the stabilization system of the working tool during movement
150 Tampo Speed Sensor
151 electromagnet tampers
152 Running light control lamp
153 Right-hand drive motor speed sensor
154 Left-hand drive motor speed sensor
155 Starting solenoid
156 Right-hand reversing solenoid (electronic display)
157 electromagnet left reversing (electronic display)
158 electromagnet of the right turn by a forward course (electronic board)
159 electromagnet of the left turn by a forward course (electronic board)
160 Asphalt paver working equipment relays
161 The sensor of the brake pedal
162 Steering Wheel Sensor
163 Steering angle sensor
164 Injection pressure switch
167 Alternator charging voltage sensor
168 Electrical system voltage
171 ambient temperature sensor
172 Intake manifold temperature sensor
174 temperature sensor fuel
175 engine oil temperature sensor
177 Transmission oil temperature sensor
190 Engine Speed Sensor
191 Output speed sensor for gearbox output
248 Caterpillar Data Link
249 Data Channel J1922 SAE (Society of Automotive Engineers)
250 Data transmission channel J1708 / J1587 SAE (Society of Automotive Engineers)
252 Calibration unit
253 Personal control unit chip
254 Electronic control unit
256 Map of the adjusting characteristics of the engine
257 Detonation level
258 Crankshaft Position Sensor
259 Programmed injection timing
260 The gauge of the maintenance of oxygen in exhaust gases (ljambda)
261 Calibration of the moment of injection of fuel
262 Sensor supply circuit 5 V
263 Power supply circuit for digital sensors (8 or 12 V)
264 Deceleration pedal
265 User input stop signal circuit
266 Dry engine scrolling input circuit (without fuel injection)
267 Input motor remote command signal circuit
268 Programmed parameter error
269 Sensor supply circuit
270 Cable code of the computerized control system (CMS)
271 Audible alarms
272 Excess turbocharging sensor
273 Turbocharger outlet pressure sensor
274 Atmospheric Pressure Sensor
275 Right turbocharger inlet pressure sensor
276 Left turbocharger inlet pressure sensor
277 Injection timing sensor
278 Indicator light for automatic engine speed control (AESC)
279 temperature sensor of cooling fluid cooling air cooler in the front section
280 temperature sensor gearbox
281 Indicator light for engine check
282 Over-speed warning light
283 Air filter clogging indicator light
284 Switching signal of EMS (electronic control system) (engine operation signal)
285 Overtake overheating indicator. Engine
286 Low oil pressure indicator light
287 Low-current digital output 7
288 Low-current digital output 8
289 Fuel pressure sensor – in front of the fuel filter
290 Engine Cooling Fan Drive Pump Pressure Sensor
291 engine cooling fan solenoid
292 hydraulic oil cooling fan solenoid
293 Power Analog Output 3
294 Analogue output 4
295 Large hydraulic power excavator control unit
296 Transmission control unit
297 All-wheel drive system
298 Service brake pedal switch
299 Shift lever position sensor
300 Primary coils of ignition coils
301 Primary coil of ignition coil 1
302 Primary coil of ignition coil 2
303 Primary coil of ignition coil 3
304 Primary coil of ignition coil 4
305 Primary coil of ignition coil 5
306 Primary coil of ignition coil 6
307 Primary coil of ignition coil 7
308 Primary coil of ignition coil 8
309 Primary coil of ignition coil 9
310 Primary coil of ignition coil 10
311 Primary coil of ignition coil 11
312 Primary coil of ignition coil 12
313 Primary coil of ignition coil 13
314 Primary coil of ignition coil 14
315 Primary coil of ignition coil 15
316 Primary winding of the ignition coil 16
317 Load cell
318 Right Detonation Sensor
319 Left Knock Sensor
320 Engine speed / injection timing
321 Reset / Diagnose message key
322 Engine stop relay
323 Engine stop indicator light
324 Alarm lamp
325 Detonation caused by the ignition system
326 The detonation system
327 Wrong number of knock sensors
328 Wrong number of engine cylinders
329 Communication link error
330 Input from the contact probe of the content of propane
331 Ignition Switch
332 Keyboard Switch
333 Switch switch
334 Standby output
335 scraper scraper electromagnet
336 Engine control switch
337 Remote engine emergency stop switch
338 Engine oil pre-lubrication pump relay
339 Engine Pre-Gasket Pressure Sensor
340 electromagnet of air cutoff
341 electromagnet 4 heating of hydraulic distributor
342 Auxiliary engine speed sensor
343 Injection nozzle of nitrogen oxide neutralizer in exhaust gases
344 Nitrogen Oxide Neutralizer Injection Pump Relay in Exhaust Gas
345 Pressure sensor for nitrogen oxide neutralizer injection system in exhaust gas
346 The relay of the system of stabilization of the working tool during the movement
347 electromagnet for regulating the supply (working volume) of the hydrostatic gearbox hydraulic motor
348 Transmission Lock Switch
349 timing synchronization solenoid
350 Throttle Position Sensor
351 Swashplate tension sensor
352 Lift lever sensor (in the cockpit)
353 Swing lever sensor (in the cockpit)
Electromagnet 1 lifting
Electromagnet 1 lowering
356 electromagnet 1 unloading
Electromagnet 1 return
358 Pressure drive in the control loop of the hydraulic system of the working equipment
359 Lifting Electromagnet
360 Electromagnet of fixation of lowering
361 Electromagnet for fixing the tilt for loading
Electromagnet of engine fan speed control
363 Drive of the stabilization system of the working tool during the movement
364 Pressure sensor in the piston cavity of the lifting hydraulic cylinder
365 Limiter setting switch
366 Contact sensor of semi-automatic recess
367 Switch for the stabilization of the working tool during the movement
368 Automatic / manual gearbox selector switch
369 Input from gearshift indicator
370 electromagnet of the floating boom position
371 electromagnet of sound signal
372 bucket opening solenoid (for a shovel excavator)
373 electromagnet closing the bucket with unloading through the tipping bottom (for the shovel excavator)
374 brake assist electromagnet
375 electromagnet of the brake of the mechanism of turn
376 Travel indicator
377 electromagnet of a running brake
378 electromagnet system automatic lubrication machine
379 Automatic machine lubrication system pressure sensor
380 Gearbox shift modulating pressure sensor
381 Contact switch for neutral position of the lift arm (in the cab)
382 Clutch lever position sensor
383 Clutch position sensor
384 Throttle switch
385 Contact sensor for neutral position of the tilt lever (in the cab)
386 clutch lifting solenoid
387 coupler lowering solenoid
388 Return of the towing vehicle electromagnet
389 Neutral contact sensor for auxiliary lever
390 electromagnet of oil flow control via forward motor
391 electromagnet for regulating oil flow through the reverse motor
Electromagnet of oil supply
393 electromagnet of a drive of forward wheels
394 electromagnet of oil flow control via drive hydraulic motor
395 electromagnet of switching of pressure in a drive of a forward wheel
396 All-wheel drive indicator light (AWD)
397 Feed pump pressure sensor
398 Front wheel pressure sensor
399 Four-wheel drive control lever (AWD)
400 Secondary coils of ignition coils
401 Secondary coil of ignition coil 1
402 Secondary coil of ignition coil 2
403 Secondary coil of ignition coil 3
404 Secondary coil of ignition coil 4
405 Secondary coil of ignition coil 5
406 Secondary coil of the ignition coil 6
407 Secondary coil of ignition coil 7
408 Secondary coil of ignition coil 8
409 Secondary coil of ignition coil 9
410 Secondary coil of ignition coil 10
411 Secondary coil of ignition coil 11
412 Secondary coil of ignition coil 12
413 Secondary coil of ignition coil 13
414 Secondary coil of ignition coil 14
415 Secondary coil of ignition coil 15
416 Secondary coil of ignition coil 16
417 Relay of interrupt of return chain of electromagnet
418 Indicator light / oil flow switch in the hydraulic circuit of the main steering
419 Relay of reverse motor
420 Auxiliary Steering Relay
421 Monitoring relays
422 Drive Shaft Speed Sensor
423 Front brake pressure accumulator pressure sensor
424 Pressure switch for rear brake accumulator
425 Oil pressure switch in the hydraulic circuit of the front brake
426 Oil pressure switch in the hydraulic circuit of the rear brake
427 front axle oil temperature sensor
428 rear oil temperature sensor
429 Oil Pressure Switch for Main Pump of Power Steering System
430 The oil pressure sensor in the steering control system of the steering system
431 Low oil level sensor in the steering system
432 Differential pressure sensor on the oil filter of the steering system
433 Differential pressure sensor on hydraulic oil filter
434 Oil Pressure Sensor in the Control Loop of the Hydraulic System
435 Hydraulic oil level sensor
436 Oil pressure switch in torque converter
437 Oil Pressure Switch Oil Pressure Sensor
438 electromagnet 1 for heating the hydraulic distributor
439 electromagnet 2 heating of hydraulic distributor
440 electromagnet 3 heating the hydraulic distributor
441 Electronic speed controller relay
442 Generator failure relay
443 Scroll interrupt relay
444 Electrostarters relay
445 Working Relays
446 Engine air-off switch
447 Fuel supply control relay
448 Standby Relay
449 Switch for manual rotation of the gripper
450 Switch for manual opening and closing jaws
451 clockwise rotation electromagnet
452 anti-clockwise rotation lock electromagnet
Electromagnet of jaw opening
454 electromagnet closing jaws
455 Pressure sensor for jaw closure
456 Hydrax system pressure sensor
457 brake oil temperature sensor
458 Pressure sensor in the rod cavity of the hydraulic ram
459 Torque converter control unit
460 The fuel pressure sensor behind the fuel filter
461 Additional auxiliary brake solenoid
462 Contact pressure sensor for coolant. At the entrance of the engine
463 Safety double-acting safety solenoid of the hydraulic circuit of the working equipment
464 Bucket tilt lever detection sensor in return position
465 Accelerator lever position sensor at maximum idling speed
466 Pedal potentiometer for left-hand drive belt
467 Right-hand drive belt pedal position sensor
468 Service brake pedal position sensor
469 electromagnet of the forward motion of the left track tape
470 reverse electromagnet of left track tape
471 electromagnet of the front run of the right track tape
472 reverse solenoid of the right track tape
473 Feed pressure sensor
474 Programmable relay control unit
475 Negotiation unit with user equipment 1
476 User equipment matching unit 2
477 Standby relay 1
478 Standby relay 2
479 Standby relay 3
480 Standby relay 4
481 Standby relay 5
482 Standby relay 6
483 Standby Relay 7
484 Standby relay 8
485 electromagnet of engine fan reversing
486 Engine Fan Reversing Switch
487 Third Lever Position Sensor
488 Fourth lever position sensor
489 Selector switch for operating equipment
490 Working equipment lock switch
491 electromagnet of the third mode forward
492 electromagnet of the third mode back
493 electromagnet of the fourth mode forward
494 electromagnet of the fourth mode back
495 electromagnet of the fifth mode forward
496 electromagnet of the fifth mode back
497 tilt solenoid right
498 left slope electromagnet
499 electromagnet of the oil pump variable performance hydraulic system of the working equipment
500 Electronic control unit
501 Cylinder Inner Chamber 1
502 Cylinder Inner Chamber 2
503 Fork Chamber 3
504 Cylinder Inner Chamber 4
505 Fork Chamber 5
506 Cylinder Inner Chamber 6
507 Cylinder Inner Chamber 7
508 Cylinder Inner Chamber 8
509 Cylinder Inner Chamber 9
510 Cylinder Inner Chamber 10
511 Cylinder Inner Chamber 11
512 Cylinder Inner Chamber 12
513 Cylinder Inner Chamber 13
514 Cylinder Inner Chamber 14
515 Fork chamber of the cylinder 15
516 Fork chamber cylinder 16
517 Four-wheel drive switch
518 Pressure control unit
519 Pressure of crankcase gases
520 Transmission configuration code
521 temperature sensor fuel
522 Fuel calorific value sensor
523 Actual engine speed sensor
524 Engine speed sensor
525 Damper actuator
526 Drive of the valve of tap of exhaust gases
527 Potentiometer for setting unevenness
528 The maximum idling speed potentiometer
529 Fuel correction factor
530 ION Sensor
531 Idle speed / rated speed switch
532 Motor Protective Shutdown Input
533 Automatic moderator control system
534 Parallel / common service input
535 Exhaust Temperature Sensor
536 Low Engine Oil Sensor
537 Coolant level sensor. Engine
538 Right Air Filter Resistance Sensor
539 Left Air Filter Resistance Sensor
540 Input signal chain of controlled equipment
541 Oil Pressure Sensor in Differential (Bridge)
542 Engine oil pressure switch in front of oil filter
543 Engine oil pressure switch after oil filter
544 Engine Cooling Fan Speed Sensor
545 Relay for air injection control
546 Current limitation in the ether injection system
547 Indicator light for switching on the air trigger system
548 Accelerator lock indicator light
549 Accelerator Lock Switch
550 Signal from the oxygen concentration sensor to the electronic control unit (ECM)
551 Oxygen Concentration Sensor and Oxygen Stabilizer Communication Circuit
552 Oxygen sensor calibration / current engine speed
553 Calibration of the oxygen concentration sensor / current oxygen concentration signal
554 Calibrating the oxygen sensor / no oxygen concentration signal
555 Oxygen sensor calibration / oxygen concentration signal against background noise
556 Oxygen sensor
557 Oxygen deficiency sensor
558 Automatic lubrication system relay
559 Boom Float Relay
560 Communication channel error
561 rear wheel accelerator locking solenoid
562 Second generation electronic monitoring system
563 Absence of required speed signal
564 Interference in the signal of the required speed
565 Emergency stop of the engine due to a missing signal of the required speed
566 Faulty operation of emergency engine shutdown
567 Indicator light for standby electronic control unit (ECM)
568 Indicator light for the redundant electronic control unit (ECM)
Electromagnet of oil injection
570 Temperature sensor out of range
571 electromagnet of elevator forward drive
572 electromagnet of elevator rear wheel drive
573 Jog Wheel Pedal Position Sensor
574 locking clamp electromagnet
575 Elevator position sensor
576 Drive from Heinzmann
577 Transmission ratio of the drive Heinzmann
578 Heinzmann drive offset
579 Pulsating signal of the main electronic control unit (ECM)
580 Switching pressure switch under load
581 electromagnet of switching under load
582 Differential pressure sensor on air filter
583 Boom lifting solenoid
584 Low Engine Oil Pressure Sensor
585 Sensor No. 1 speed of the output shaft of the gearbox
586 Engine speed rotary switch
587 Engine Speed Controller
588 Control system display
589 Travel / earth moving switch
590 Engine control unit
591 Electrically erasable memory (read-only)
592 lifting electromagnet 2
593 electromagnet of lowering 2
594 return electromagnet 2
595 discharge solenoid 2
596 Electronic control of working equipment
597 Hydraulic pump discharge pressure sensor
598 speed control electromagnet
599 Computerized Monitoring System (CMS)
600 Hydraulic oil temperature sensor
601 Brake Pressure Sensor
602 Pressure sensor P2 of the gearbox
603 Torque Converter Clutch Pressure Sensor
604 Automatic gear shift, interlock switch
605 Wheel Speed Sensor 1
606 Wheel speed sensor 2
607 Wheel Speed Sensor 3
608 Wheel Speed Sensor 4
609 electromagnet 1 wheel brake
610 electromagnet 2 wheel brakes
611 electromagnet 3 wheel brakes
612 electromagnet 4 wheel brakes
613 front brake solenoid
614 electromagnet of the control circuit of the rear brakes
615 Steering angle sensor for vehicle half-arches with articulated joint
616 System check mode switch
617 Supply air heater preheater in intake manifold
618 Left auxiliary brake sensor
619 Right auxiliary brake sensor
620 Towing mode switch
621 Downshift Switch
622 Increase gear selector
623 Direction switch
624 Gearbox neutral sensor
626 Steering Lock / Gearbox Control Switch
627 Parking Brake Pressure Sensor
628 Accelerated Shift Switch
629 The neutralizer sensor
631 clutch solenoid 1
632 clutch solenoid 2 gearbox
633 clutch solenoid 3 gears
634 clutch solenoid 4 gearbox
635 clutch solenoid 5 gearbox
636 clutch solenoid 6 gearbox
637 Reverse signal
638 Starter electromagnet
639 1st gear indicator light
641 electromagnet No. 1 of the gearbox
642 electromagnet No. 2 of the gearbox
643 electromagnet No. 3 of the gearbox
644 electromagnet # 4 of the gearbox
645 electromagnet No. 5 of the gearbox
646 electromagnet 6 of the gearbox
647 electromagnet # 7 of the gearbox
648 electromagnet 8 of the gearbox
650 Cable code
653 Electronic control unit
654 trailer right brake temperature sensor
655 trailer left brake temperature sensor
656 temperature sensor at the inlet of the trailer oil cooler
657 temperature sensor at the outlet of the trailer oil cooler
658 Right pressure sensor hydraulic cylinder for trailer suspension
659 Pressure sensor for left hydraulic cylinder for trailer suspension
660 12th gear selector input circuit
661 13th gear selector input circuit
662 14th gear selector input circuit
663 15th gear selector input circuit
664 16th gearshift input circuit
665 17th gear selector input circuit
666 18th gear selector input circuit
667 19th gear selector input circuit
668 Gear Shift Knob
669 Transmission Speed Sensor
670 Left Pedal Position Sensor
671 Output Speed Shift Sensor
672 Torque converter output torque converter
673 Sensor II speed gearbox output shaft
674 Transaxle Shaft Speed Sensor I
675 Transmitter II speed sensor intermediate gearbox
676 Lever position sensor for left belt drive
677 Right-hand drive belt lever position sensor
678 clutch solenoid of torque converter impeller
679 torque converter clutch solenoid
680 Switch for manual / automatic switching on of the working tool when driving
681 parking brake solenoid
682 Parking brake light indicator
683 Parking brake alarm
684 Manual gearbox reverse switch
685 Service identification code
686 Work shift identification code
687 Identification code of additional equipment
688 power regulation electromagnet
Electromagnet of the left brake
Right-hand brake solenoid 690
691 electromagnet No. 1 of the gearbox
692 electromagnet No. 2 of the gearbox
693 electromagnet No. 3 of the gearbox
694 electromagnet # 4 of the gearbox
695 electromagnet No. 5 of the gearbox
696 electromagnet No. 6 of the gearbox
697 priority valve solenoid
698 electromagnet of the left side clutch
699 right-hand friction electromagnet
700 Sensor for gearbox engaged
701 Output Shaft Speed Sensor
702 Shift lever position switch (pin)
703 Trailer Hatch Sensor
704 Service brake service brake pressure switch
705 Position sensor for lifting arm (pin)
706 Body position sensor in raised position
707 electromagnet of increase of transfers (transmissions)
708 electromagnet for lowering gears (gearbox)
709 clutch lock solenoid
710 electromagnet of the automatic delay control (ARC)
711 The distributive electromagnet of the automatic moderator control system (ARC)
712 Automatic deceleration indicator light
713 Automatic retarder control mode switch
714 Pressure switch for automatic moderator control
715 Contact moderator pressure sensor
716 Electrical power sensor
717 Remote accelerator switch
718 Transmission
719 electromagnetic proportional valve for traction control (TCS)
720 Helical resolver
721 service brake solenoid
722 auxiliary brake solenoid
723 Automatic Flashing Light Relay
724 lifting hoist electromagnet
725 electromagnet of the hoisting mechanism lowering mode
726 Right-hand steering electromagnet
727 Left steering solenoid
728 Control signal in automatic / manual mode
729 External switch of automatic / manual operation modes (from ground level)
730 Switch for automatic / manual operation modes (in the cab)
731 PWM signal of engine speed (rpm) (duty cycle)
732 electromagnet of exact turn of a platform
733 electromagnet locking oil cooler hydraulic system
734 Outlet electromagnet of automatic lubrication system
735 Heavy Lift Lift Electromagnet
736 Control channel for automatic engine speed control (AESC)
737 Neutralizer pedal position sensor
738 Ripper position sensor
739 Differential lock indicator light
740 Differential lock solenoid
741 Torque converter power indicator light
742 Service brake light / relay
743 The sensor of turning the tape with the tape forward (PWM)
744 The sensor of turning the tape with the backward movement (PWM)
745 Speed control lever (PWM) sensor
746 Contact sensor of the rotor control system (PWM)
747 Steering Mode Contact Switch (PWM)
748 Contact sensor for the position of the rotor door
749 Recoil sensor
750 Rear left-hand wheel control switch
751 Water Spray Switch
752 brake electromagnet / rotor belt tension
753 electromagnet of rotor service brake
754 rotor coupling electromagnet
755 Water spray relay
756 rotor clutch oil temperature sensor (PWM)
757 Rotor Clutch Oil Pressure Sensor (PWM)
758 Hydraulic oil pressure switch (PWM)
759 Low engine oil level warning light
760 Engine oil filter clogging indicator
761 Fuel filter clogging indicator light
