Diagnostic Codes
 

DISCLAIMER: YOU DO THIS AT YOUR OWN RISK AND MAY VOID THE MANUFACTURERS WARRANTY.

DIAG mode allows user to check tons of stuffs inside the electronic brain of the XT. It also allows Yamaha servicing to check previous problems too.

To access DIAG mode :

switch off Engine Run switch, switch OFF Key switch. Press both SELECT & RESET buttons and then switch ON Key switch. Keep SELECT & RESET buttons pressed for at least 8 seconds. Display then changes to "DIAG". Release SELECT & RESET buttons.
Select Diag mode by pressing again both SELECT & RESET buttons.
Select code below by pressing SELECT (up) or RESET (down).

Diag Code Number

Part I : Sensors

01 : Throttle position - must be from 15-17 (closed) to 97-100 (opened)
02 : Atmospheric pressure given in mmHg (normal is 760 - average weather)
03 : Differential pressure between air and intake pipe
05 : Air intake temperature (in Celcius)
06 : Cooling liquid temperature (in Celcius)
07 : Absolute speed (must be 000 in garage). Check with rear weel.
08 : Lean angle safety switch control - must be from 0.4-1.4 (upright) to 3.8-4.2 (horizontal). DISMOUT THE SWITCH FOR CHECKING !!!
09 : Battery voltage - must be above 12.0
20 : Side stand switch - displays ON or OFF
21 : Neutral gear switch - displays ON or OFF

Part II : ECU memory check.

60 : EEPROM error code presence - 00 means no default, 01 or 02 means default on corresponding cylinder (blinks if both cylinders).
61 : Error Code memory log - Displays 00 if no error code in memory, displays the Error Code if any (11 to 50). Display changes every two seconds if more than one Error Code in memory, then start again from first.
62 : Displays the number of Error Code in memory. To clear the memory, switch the Engine Run Switch to ON position (no backup).
70 : Check Code number, display from 0 to 255

Part III : Activators - To activate, turn Engine Run switch from OFF to ON - Engine check light is activated too.

30 : Coil 1 is activated 5 times per second.
31 : Coil 2 is activated 5 times per second.
36 : Injector 1 solenoid is activated 5 times per second.
37 : Injector 2 solenoid is activated 5 times per second.
48 : Air duct solenoid is activated 5 times per second.
49 : Air intake solenoid is activated 5 times per second.
50 : Fuel injection relay is activated 5 times per second.
51 : Cooler fan is activated every 5 seconds.
52 : Headlight relay is activated every 5 seconds (2 seconds ON, 3 seconds OFF) - 2003+ model only.

DISCLAIMER: YOU DO THIS AT YOUR OWN RISK AND MAY VOID THE MANUFACTURERS WARRANTY.

Error Codes
 

DISCLAIMER: YOU DO THIS AT YOUR OWN RISK AND MAY VOID THE MANUFACTURERS WARRANTY.

Error Codes

Error Number 11 : Cylinder identification sensor error - DIAG mode (none)
Error Number 12 : Crankshaft posiiton sensor error - DIAG mode (none)
Error Number 13 : Air intake pressure sensor error - DIAG mode 03
Error Number 14 : Air intake duct error - DIAG mode 03
Error Number 15 : Throttle position sensor error - DIAG mode 01
Error Number 19 : Sidestand sensor error - DIAG mode 20
Error Number 20 : Air pressure sensors error - DIAG mode (none)
Error Number 21 : Coolant temperature sensor error - DIAG mode 06
Error Number 22 : Air intake temperature sensor error - DIAG mode 05
Error Number 23 : Ambient air pressure sensor error - DIAG mode 02
Error Number 24 : O2 (lambda) sensor error - DIAG mode (none)
Error Number 30 : The bike went down - DIAG mode 08
Error Number 33 : Coil 1 open circuit - DIAG mode 30
Error Number 34 : Coil 2 open circuit - DIAG mode 31
Error Number 41 : Tilt sensor error - DIAG mode 08
Error Number 42 : Speed sensor error / Neutral sensor in short-circuit - DIAG mode 07-21
Error Number 43 : Battery voltage control error - DIAG mode (none)
Error Number 44 : EEPROM read/write error - DIAG mode 60
Error Number 50 : ECU memory error - DIAG mode (none)
Error Er-1 : ECU link error
Error Er-2 : ECU link error
Error Er-3 : ECU link error
Error Er-4 : ECU link error

Following ERROR codes DO NOT allow engine to run :
11-12-19-30-41-50 and Er-1 to Er-4
Error code 11 allow engine to continue running only if fault appears after engine start.

Following ERROR codes DO allow engine to run but need immediate check because default values are taken by the ECU: 13-14-20-21-22-23-24-24-42-43-44

DISCLAIMER: YOU DO THIS AT YOUR OWN RISK AND MAY VOID THE MANUFACTURERS WARRANTY.

If you look at the manual page 350 (7-7), It's says 'Disconnect the wire harness coupler from the fuel pump'. Do we have to follow this procedure to make sure that the CO settings or modifications work for good?
L66

If your just changing the CO setting then no,just do it from the display unit and the settings will stay to what you set them at.

Can you run the engine while in the diagnostic mode? To look at the sensor readings...
JH

No i am afraid you can't cause if you press the select and start buttons with the engine running you can only change from mph to kmh or adjust the clock.

Hi

Anyone aware of what error code number 46 is?
it came up on the display after my bike failed to start one cold morning, i charged the battery for a while and it started and eventually cleared itself but its been logged in the diag, just havent been able to find out what it means

cheers
Nick

Oh that!! Its just the bike telling you: "Who the **** do you think you are, Valentino Rossi??"

http://www.thunderbike.co.nz/newslet...6winter/46.jpg


Seriously I don't think that error code is listed, hence I've never heard of, let's see what Kev reckons....

cheers anyway capt,
have booked in for a service next month, so if they can shed any light on Number 46 ill let yah know.
Think its just my bike paying me back for the amount of times ive stacked the poor ****** tho!!!

Code 46 is the voltage supply monitored in the engine ECU, if your battery was flat it will bring up this code up, as the voltage in the engine ECU come up to the correct value the code will clear.