Yamaha TRX 850 Fault Codes

Yamaha TRX 850 motorcycles have engines, which are made up of many different parts. These parts must work together in order for the engine to function. A problem with one of the parts can make the engine not run. There are many different parts that make up an engine. The following yamaha trx 850 faults are the list of some of the parts of a motorcycle engine.

The fault codes are essential to the Yamaha TRX 850 motorcycle operation, as they create the spark that ignites the mixture of air and fuel in the engine. Check to see that the spark plugs are not soiled with carbon. As a result, the spark plugs will provide a much weaker spark. The most common cause of soiled spark plugs is the improper installation of an air filter. The air filter prevents dirt from getting into the engine, but a faulty air filter will allow dirt to enter the carburetor.

Yamaha TRX 850 Faults :

Another drawback that may occur along with your bike engine could be a blown gasket. this will cause your engine to overheat and presumably crack the cylinder heads. during this case, it's best to require your Yamaha TRX 850 bike to an expert mechanic to possess it verified. Another common drawback is with the carburettor. The carburettor is that the a part of your bike that mixes air and fuel to make the combustion required to power the engine.

In the list range from d01 to d59, a self-diagnosis of the system components is carried out.

Inclusion of some components is carried out by the stop engine button.

Yamaha Self-diagnosis Code List (opposite the menu number of the list, decoding of readings + nominal value):

D: 01 = Throttle Position Sensor completely closed, indicators from 12 to 21 fully open, indicators from 96 to 106
D: 02 = atmospheric pressure, in percent;
D: 03 = absolute atmospheric pressure in the intake circuit;
D: 05 = air temperature in the intake circuit;
D: 06 = coolant temperature;
D: 07 = speed sensor readings;
D: 08 = drop sensor position normal position, indicator 0.4 - 1.4 inverted position, indicator 3,7 - 4,4
D: 09 = vehicle voltage
D: 13 = Throttle Position Sensor 2 completely. closed, indicator from 9 to 23 fully open, score from 94 to 108
D: 14 = Throttle Position Sensor 1 completely closed, indicator from 12 to 22 fully open, indicator from 97 to 107
D: 15 = throttle position sensor 2 completely closed, indicator from 10 to 24 fully open, indicator from 95 to 109
D: 20 = position sensor side steps;
D: 21 = gearbox position sensor (neutral)
D: 60 = EEPROM, system error sheet (00 = no errors, 01-04 = error codes for cylinders, if there is more than one error in the memory, they are displayed alternately)
D: 61 = error sheet of the ignition module for sensors (00 = there are no errors in the memory, 11-70 = error codes for the components, if there are more than one error in the memory, they are displayed alternately)
D: 62 = the number of errors in the memory module (00 = no errors, XX - the number of errors, erasing the errors is done by turning on the "stop engine" button);
D: 63 = sub-category of the error code (only for error 24, if there is more than one value in memory, then the value is displayed alternately)

THE LIST OF SELF-DIAGNOSIS BY UNITS :

D: 30 = diagnosis of the ignition coil 1 cylinder;
D: 31 = diagnosis of ignition coil 2 cylinder;
D: 32 = diagnosis of ignition coil 3 cylinders;
D: 33 = diagnosis of the ignition coil 4 cylinder;
D: 34 = intake valve diagnosis
D: 36 = diagnosis of the primary injector nozzle 1
D: 37 = diagnosis of the primary injector nozzle 2
D: 38 = diagnosis of the primary injector nozzle 3
D: 39 = diagnosis of the primary injector nozzle 4
D: 40 = diagnosis of the secondary injector nozzle 1
D: 41 = diagnosis of the secondary injector nozzle 2
D: 42 = secondary injector diagnosis, injector 3
D: 43 = diagnosis of the secondary injector nozzle 4
D: 47 = diagnosis of the steering damper sensor;
D: 48 = intake valve valve sensor diagnosis;
D: 50 = diagnosis of the fuel pump relay;
D: 51 = diagnosis of the cooling fan motor relay;
D: 52 = Diagnostics of the headlamp lamp relay;

Yamaha Error Codes

Error CodeExplanation of error codesTranscript
11Error cylinder position sensor;
12crankshaft position sensor error;
13Error in the inlet pressure sensor (the sensor is within the desired range)self-diagnosed string D: 03;
14Error in the inlet pressure sensor (sensor disconnected or faulty)selfdiagnosed string D: 03;
15error position sensor throttleself diagnosed line D: 01 + D: 13;
19error on the incoming signal from the ECU (short circuit or disconnected sensor side footboard)- self diagnosed line D: 20;
20the error of sensor readings of atmospheric and absolute pressure in the inlet, not permissible valuesself-diagnosed string D: 03, D: 02;
21Error reading sensor coolant temperatureself diagnosed string D: 06;
22Error in the inlet temperature sensor,self-diagnosed string D: 05;
23error sensor readings of atmospheric pressureself-diagnosed string D: 02;
24error of the oxygen sensor (O2 sensor, lambda probe);
30Error drop sensor (triggered or faulty sensor),self-diagnosed string D: 08;
33faulty ignition coil cylinder 1self-diagnosed string D: 30;
34faulty ignition coil cylinder 2self-diagnosed string D: 31;
35faulty ignition coil 3 cylinderself diagnosed string D: 32;
36faulty ignition coil 4 cylinderself diagnosed string D: 33;
39Primary circuit fault injectorself diagnosed string D: 36,37,38,39;
40fault circuit secondary injectorself diagnosed string D: 40,41,42,43;
41fault or short circuit in the wiring of the sensor fallsself-diagnosed string D: 08;

Yamaha Indicators / Codes&Descriptions

CodesDescription
d01throttle position (twist the throttle)
d02atmospheric pressure (absolute percentage)
d03vacuum at the inlet (the sensor in the air cleaner housing, in percent)
d05air temperature at the inlet (the sensor in the air filter housing, nominal percentage as I understand it)
d06coolant temperature at the moment
d07speed sensor (figure)
d08drop sensor (tilt)
d09voltage at the gasoline pump (tested by including a stop of the engine)
d20SEITENSTAENDER (on / off) - testing only works when off neutral
d21neutral sensor (on / off)
d301 coil per cylinder (when the stop button the engine is made by testing the coil 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d312 cylinder coil (when the stop button the engine is made by testing the coil 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d323 coil cylinder (when the stop button the engine is made by testing the coil 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d334 cylinder coil (when the stop button the engine is made by testing the coil 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d361 cylinder injector (when the stop button the engine is made by testing the nozzle 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d372 cylinder injector (when the stop button the engine is made by testing the nozzle 5 pulses, accompanied by a distinctive sound, with concurrently. lamp
d383 cylinder injector (when the stop button the engine is made by testing the nozzle 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d394 cylinder injector (when the stop button the engine is made by testing the nozzle 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d48AI valve. (when the buttons stop valve engine is tested, 5 pulses, accompanied by a distinctive sound, with concurrently. lamp blinking Check Engine)
d50power relay injector and ignition system (tested in the same stop-button engine)
d51relay switching the cooling fan (tested in the same stop-button engine)
d52relay head light (PAR) (tested in the same stop-button engine)
d53testing of servo motor EXUP (tested just stop engine button, shows the value in the corners)
d56secondary servo valves (tested just stop engine button, shows the value in the corners)
d60error of the switch (the codes are displayed alternately, a list of the error codes of the switch below)
d61recorded in the memory of the error code
d62erase the stored fault codes
d70displays the code of a running program (0-255)

Yamaha TRX 850 Motorcycle Problems :

  • Yamaha trx 850 after fire
  • Yamaha trx 850 air cleaner clogged, poorly sealed, or missing
  • Yamaha trx 850 air cleaner element clogged
  • Yamaha trx 850 air duct loose
  • Yamaha trx 850 air suction valve trouble
  • Yamaha trx 850 air switching valve trouble
  • Yamaha trx 850 backfiring when deceleration
  • Yamaha trx 850 cracked or obstructed intake air pressure sensor
  • Yamaha trx 850 crankshaft sensor trouble
  • Yamaha trx 850 eCU ground and power supply trouble
  • Yamaha trx 850 eCU trouble
  • Yamaha trx 850 engine overheating - Water temperature sensor or crankshaft sensor trouble
  • Yamaha trx 850 engine stalls easily
  • Yamaha trx 850 engine vacuum not synchronizing
  • Yamaha trx 850 exhaust Smokes Excessively
  • Yamaha trx 850 firing incorrect
  • Yamaha trx 850 fuel filter clogged
  • Yamaha trx 850 fuel injector clogged
  • Yamaha trx 850 fuel injector O-ring damage
  • Yamaha trx 850 fuel injector trouble
  • Yamaha trx 850 fuel line clogged
  • Yamaha trx 850 fuel poor quality or incorrect
  • Yamaha trx 850 fuel pressure regulator trouble
  • Yamaha trx 850 fuel pressure too low or too high
  • Yamaha trx 850 fuel pump bearings may wear. Replace the fuel pump
  • Yamaha trx 850 fuel pump not operating
  • Yamaha trx 850 fuel pump operates intermittently and often DFI fuse blows
  • Yamaha trx 850 fuel pump relay trouble
  • Yamaha trx 850 fuel pump trouble
  • Yamaha trx 850 fuel/air mixture incorrect
  • Yamaha trx 850 fuel/air mixture incorrect
  • Yamaha trx 850 gear position sensor, starter lockout or side stand switch trouble
  • Yamaha trx 850 inspect and repair or replace
  • Yamaha trx 850 intake air pressure sensor trouble
  • Yamaha trx 850 intake air temperature sensor trouble
  • Yamaha trx 850 intake air temperature sensor trouble
  • Yamaha trx 850 intermittent any DFI fault and its recovery
  • Yamaha trx 850 little fuel in tank
  • Yamaha trx 850 main throttle sensor trouble
  • Yamaha trx 850 no or little fuel in tank
  • Yamaha trx 850 poor acceleration
  • Yamaha trx 850 spark plug burned or gap maladjusted
  • Yamaha trx 850 spark plug dirty, broken or gap maladjusted
  • Yamaha trx 850 spark plug incorrect
  • Yamaha trx 850 spark weak
  • Yamaha trx 850 stick coil shorted or not in good contact
  • Yamaha trx 850 stick coil trouble
  • Yamaha trx 850 subthrottle sensor trouble
  • Yamaha trx 850 subthrottle valve actuator trouble
  • Yamaha trx 850 throttle body assy dust seal damage
  • Yamaha trx 850 throttle body assy holder loose
  • Yamaha trx 850 throttle valves will not fully open
  • Yamaha trx 850 unstable (rough) idling
  • Yamaha trx 850 unstable fuel pressure
  • Yamaha trx 850 vacuum hose
  • Yamaha trx 850 vehicle-down sensor trouble
  • Yamaha trx 850 water or foreign matter in fuel Change fuel
  • Yamaha trx 850 water temperature sensor trouble

Your motorcycle engine consists of a lot of parts such as the engine block, cylinder heads and pistons. It is important to make sure these are all clean and lubricated to avoid engine problems. Also remember that Yamaha TRX 850 motorcycle engine is a very delicate piece of machinery so it's best to handle it with care.

Possible Failure Types :

  • Strange Yamaha TRX 850 engine noise.
  • Yamaha TRX 850 fog from engine.
  • Strange Yamaha TRX 850 engine noise.
  • Yamaha TRX 850 Vibrations and Rattling
  • Yamaha TRX 850 Loud Acceleration
  • Yamaha TRX 850 rusty exhaust
  • Yamaha TRX 850 blockages in exhaust pipe
  • Yamaha TRX 850 wear and tear exhaust
Yamaha Logo

Yamaha Motor Company was formed in 1955 as an associate company of Yamaha Corporation, which still holds the majority voting stake in the company. Much of the development of their motorcycles is derived from motorsports, which shows with exceptional supersport models such as the YZF-R1.

Check other Yamaha fault codes.

Common abbreviations and their meanings below:

ABS: Anti-Lock Braking System
ACR: Automatic Compression Release
AFR: Air Fuel Ratio
AIS: Active Intake Solenoid
ATS: Air Temperature Sensor
BAS: Bank Angle Sensor
BCM: Body Control Module
CAN: Controller Area Network
CCM: Cruise Control Module
CKP: Crank Position Sensor
DLC: Datalink Connector
DTC: Diagnostic Trouble Codes
ECM: Electronic Control Module
ECT: Engine Coolant Temperature
ECU: Electronic Control Unit
EFI: Electronic Fuel Injection
EFP: Electronic Fuel Pump
ET: Engine Temperature sensor
FI: Fuel Injectors
FPR: Fuel Pressure Regulator
H-DSSS: Harley-DavidsonĀ® Smart Security System
HCU: Hydraulic Control Unit, ABS
HFSM: Hands Free Security Module
HO2S: Heated Oxygen Sensor
IAC: Idle Air Control actuator
IAT: Intake Air Temperature sensor
ICM: Ignition Control Module
IMAP: MAP + IAT in one unit
ISS: Ion Sensing System
JSS: Jiffy Stand Sensor
LHCM: Left Hand Control Module
MAP: Manifold Absolute Pressure sensor
MHR: Right Hand Control Module
RCM: Reverse Control Module
TCA: Throttle Control Actuator
TGS: Twist Grip Sensor
TMAP: Intake Air Temperature / Manifold Absolute Pressure equipment
TPS: Throttle Position Sensor
TSM / TSSM: (Turn Signal / Turn Signal Security Module)
VE: Volume Efficiency
VIN: Vehicle Identification Number
VSS: Vehicle Speed Sensor
WSS: Wheel Speed Sensor

These abbreviations, and the accompanying list of trouble codes, can be a great start when your Yamaha check engine light comes on. As mentioned above, if you are not comfortable with electrical diagnostic work, a dealership or qualified technician can offer assistance. Please keep in mind that even though you have the ability to clear a DTC using the onboard diagnostic feature, you shouldn't clear the code prior to your service appointment. Let the technician view and clear the codes as they troubleshoot the issue.

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Motorcycle electrical systems are very complex to fix it, check with your motorcycle diagnosis tool for the fault code and start motorcycle troubleshooting process.Some bike problems require professional troubleshooting and repair. However, there are many issues that you can easily fix on your own.

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