The DIAG mode is accessible from the dashboard without special tools or electronic device as this is the case on most modern bikes & cars. It allows control of the ECU sensors and actuators. The history of operating errors previously recorded by the ECU is also available and resetable.
ECU DIAG Mode
• The Diag test #09 (battery voltage check) will not give a correct result with the fuel pump still connected.
• The actuator tests is also a problem because of the noise made by the fuel pump when activated : testing the injectors and the relays is more difficult. In this case the fuel pump should be disconnected too.
1 - Clock
2 - Odometer
3 - SELECT button
4 - RESET button
5 - Engine control light
A - Entering the DIAG ModeStarting condition : main switch is in OFF position.
1 - Press the SELECT and RESET buttons.
2 - Turn the main switch to the ON position while keeping the buttons depressed.
3 - Wait until the display changes and DIAG appears - this takes around 8 seconds.
4 - Release both buttons.
B - Select the DIAG Mode1 - Press again both buttons.
2 - Wait until d01 appears on the screen : DIAG #01.
3 - To select the required DIAG code, press the SELECT button to increase code or the RESET button to decrease code.
Codes 01 to 21 : sensors control codesThe sensors send data to the ECU in order to calculate the ignition & the injection timings, and also for the safety of the engine and the bike.
Note : the temperatures are normally given in Celcius, unless the display is set for mph. In this case temperatures are in Fahrenheit.
|01||Throttle Position Sensor. Should display 15 - 17 (closed) up to 97 - 100 (fully open).|
|02||Barometric Air Pressure given in mmHg (% on some ECU). Should display around 760 (or 100%).|
|03||Manifold Air Pressure (differential). Zero when engine is not running.|
|05||Intake Air Temperature.|
|06||Engine Coolant Temperature.|
|07||Vehicle Speed Sensor. Rotate the rear wheel to check.|
|08||Lean Angle Sensor. Should display 0.4 - 1.4 (upside sensor) or 3.8 - 4.2 (above 65°).|
|09||Battery voltage. Should display 12.0 min, activate the "Engine Stop" switch to check.|
|20||Side-stand switch. Should display ON or OFF. Engage the gearbox before checking.|
|21||Neutral gearbox switch. Should display ON or OFF.|
Codes 30 to 52 : actuators control codesActuators are devices under control of the ECU : injectors, ignition coils, solenoids, relays, etc.
Switch the Engine Stop switch to RUN to start checking, then to OFF.
The Engine control light should also light up during activation.
|30||Ignition coil #1 is activated 5 times per second.|
|31||Ignition coil #2 is activated 5 times per second.|
|36||Injection solenoid #1 is activated 5 times per second.|
|37||Injection solenoid #2 is activated 5 times per second.|
|48||Air induction system (PAR) solenoid is activated 5 times per second.|
|49||Air box intake flap solenoid is activated 5 times per second.|
|50||Injection system relay is activated 5 times per second.|
|51||Fan is activated every 5 seconds (2 seconds ON, 3 seconds OFF).|
|52||Headlights relay is activated every 5 seconds (2 seconds ON, 3 seconds OFF) - 2003+ models only.|
Codes 60 to 70 : ECU internal memory control & error codes controlChecks the internal memory of the ECU, displays (and cancels) all previously recorded error codes.
Refer to the Error Codes page for their description.
|60||EEPROM : CO value memory error.|
• 00 : no error found.
• 01 and/or 02 : error on cylinder #1 and/or cylinder #2.
|61||Error Codes in memory.|
• 00 : no error code.
• Error codes are displayed in sequence (loop).
|62||Number of Error Codes in memory (displayed using mode 61).|
• 00 : no error code.
• The Error Codes memory may be reset by activating the Engine Stop switch.
|70||Control Code : 0 to 255. No further documentation available.|