Yamaha YZF1000 R1  02-03

True Rear Wheel Horsepower tm Factory EC997

Low Inertia EC997 Eddy Current Dyno in operation in Switzerland at Pichard Racing

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 Misc. Information  

ECU TROUBLESHOOTING CODES

With your bikes key on the off position, push the reset and select (both buttons) for 8 seconds. Turn the key on. When it says diag. on the lcd....release the buttons then press them again for 2 seconds. you will see a number 16 in the lcd.
That's the throttle position indicator for #01 Code

FI FUEL INJECTION SYSTEM
Diagnostic mode table
Set the meter display from the regular mode to the diagnosis mode. For the setting method, refer to “DIAGNOSTIC MODE”.

Listing order....

## Diagnostic type code
This test obtains this data
Actions to perform to obtain information
Actions to perform to obtain information
reference value as specced by Yamaha
reference value as specced by Yamaha

01 Throttle angle
Displays the throttle angle.
• Check with throttle fully closed.
• Check with throttle fully open.  0 ~ 125 degrees
• Fully closed position (15 ~ 17)
• Fully open position (97 ~ 100)

This test shows how the internal maps are referenced to actual throttle position.
If the the ECU thinks that the throttle is open 96% of the way when throttle angle is actually at a mechanical 100% throttle, if simply means that the ECU is accessing the Main Fuel and Main Ignition map values at 96% throttle, rather than whatever the map actually specifies for 100% throttle.
Is that a huge difference - 96% to 100%? Power Commanders don't even have a 90% throttle position for adjustment, so, at their self proclaimed,  "state of the art", at least they don't think it's important from 81% to100%.
I don't really agree with a 19% spread as being "not important", and the TEKA EMS has a lot better resolution or "granularity" from the bottom to the top in both rpm and throttle position. (Whenever we release it!)
As far as the 4% difference at Full throttle of our example - the mixture and timing differences are likely negligible and would want to see A-B-A-B testing to prove that one - and only in Steady State test mode - to eliminate the affects of Sweep Test fuel contamination.
Now - as far as the lower % of throttle position, things get a bit more apparent.
At smaller throttle positions, the fuel and ignition timing changes significantly with small % changes of throttle and rpm.
If you change the Throttle Position Sensor setting, the differences are more apparent. Moving the TPS setting, will affect the cruise, idle (and maybe - just maybe) the cold starting.
Moving the TPS will cause the ECU to advance or retard the ignition timing, based on it's accessing the internal ECU maps at the same SOFTWARE TPS %, which is now related to a different MECHANICAL TB % opening.

02 Atmospheric pressure
Displays the atmospheric pressure.
* Use an atmospheric pressure gauge to check the atmospheric pressure.
Compare it to the value displayed on the meter. 

This is the sensor that is supposed to help adjust the fuel and possibly the ignition timing as related to barometric pressure - as in 14k feet at Pike Peak or 5k feet at Colorado Springs or San Francisco at sea level.
In "theory", the sensor works just fine, but the actual amount of compensation may or may not have been internally "mapped" nicely, as in the 01-02 gsxr750 Suzuki's - which had to be mapped very differently from sea level to 5k feet this year at AMA races. The gsxr600's, however, seemed to have a better compensation map and required negligible fuel map changes! Not picking on Suzuki - as these compensation maps are "evolved" rather than "generated by the numbers". The 2003 and later Suzuki's seem to be pretty spot on.

03 Pressure difference
(atmospheric pressure - intake air pressure)
Displays the pressure difference (atmospheric pressure - intake air pressure).
Engine stop switch is on.
* Generate the pressure difference by cranking the engine with the starter, without actually starting the engine. 10 ~ 200 mmHg 

Aha! This is the sensor that helps the ECU change mapping (yes, another internal map!) as intake air pressure changes as in ram-air and cleaner or dirtier air filters -

05 Intake temperature
Displays the intake air temperature.
* Check the temperature in the air cleaner case.
Compare it to the value displayed on the meter.

This sensor 

06 Coolant temperature
Displays the coolant temperature.
* Check the temperature of the coolant.
Compare it to the value displayed on the meter.

07 Vehicle speed pulse
Displays the accumulation of the vehicle pulses that are generated when the tire is spun.
(0 ~ 999; resets to 0 after 999)
OK if the numbers appear on the meter.

08 Lean angle cut-off switch
Displays the lean angle cut-off switch values.
Upright: 0.4 ~ 1.4 V
Overturned: 3.8 ~ 4.2 V

09 Fuel system voltage
(battery voltage)
Displays the fuel system voltage (battery voltage).
Engine stop switch is on.
0 ~ 18.7 V
Normally, approximately 12.0 V

20 Sidestand switch
Displays that the switch is ON or OFF. (When the gear is in a position other than neutral.)
Stand retracted: ON
Stand extended: OFF

21 Neutral switch
Displays that the switch is ON or OFF
Neutral: ON
In gear: OFF

30 Ignition coil #1
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates ignition coil #1 for five times every second and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check that spark is generated, 5 times with the engine stop switch ON.

31 Ignition coils #2
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates ignition coil #2 for five times every second and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check that spark is generated, 5 times with the engine stop switch ON.

32 Ignition coil #3
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates ignition coil #3 for five times every second and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check that spark is generated, 5 times with the engine stop switch ON.

33 Ignition coil #4
 After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates ignition coil #4 for five times every second and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check that spark is generated, 5 times with the engine stop switch ON.

36 Injector #1
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the injector five times every second and illuminates the engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the operating sound of the injector five times with engine stop switch ON.

37 Injector #2
after 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the injector five times every second and illuminates the engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the operating sound of the injector five times with engine stop switch ON.

38 Injector #3
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the injector five times every second and illuminates the engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the operating sound of the injector five times with engine stop switch ON.

39 Injector #4
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the injector five times every second and illuminates the engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the operating sound of the injector five times with engine stop switch ON.

48 AI system solenoid
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the AI system solenoid five times every second and illuminates the engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the operating sound of the AI system solenoid 5 times with the engine stop switch ON.

50 Fuel injection system relay
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the fuel injection system relay five times every second and illuminates the engine trouble warning light (the light is OFF when the relay is ON, and the light is ON when the relay is OFF).
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the fuel injection system relay operating sound 5 times with the engine stop switch ON.

51 Radiator fan motor relay
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the radiator fan motor relay five times every 5 seconds and illuminates the engine trouble warning light. (ON 2 seconds, OFF 3 seconds)
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the radiator fan motor relay operating sound 5 times with the engine stop switch ON.
(At that time, the fan motor rotates.)

52 Headlight relay 1
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the headlight relay five times every 5 seconds and illuminates the engine trouble warning light. (ON 2 seconds, OFF 3 seconds)
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Check the headlight relay operating sound 5 times with the engine stop switch ON.
(At that time, the headlight turns ON.)

53 EXUP servo motor
After 1 second has elapsed from the time the engine stop switch has been turned from OFF to ON, it actuates the servo motor turns to open side at 3 seconds and to close side at 3 seconds.
* If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
Turn on the engine trouble warning light while servo motor is operated.

60 E2PROM fault code display
• Transmits the abnormal portion of the data in the E2PROM that has been detected as a self-diagnostic fault code 44.
• If multiple malfunctions have been detected, different codes are displayed at 2-second intervals, and this process is repeated.
(01 ~ 04) Displays the cylinder number.
(00) Displays when there is no malfunction.

61 Malfunction history code display
• Displays the codes of the history of the self-diagnosis malfunctions (i.e., a code of a malfunction that occurred once and which has been corrected).
• If multiple malfunctions have been detected, different codes are displayed at 2-second intervals, and this process is repeated.
11 ~ 50
(00) Displays when there is no
malfunction.

62 Malfunction history code erasure
• Displays the total number of codes that are being detected through self diagnosis and the fault codes in the past history.
• Erases only the history codes when the engine stop switch is turned from OFF to ON. If the engine stop switch is ON, turn it OFF once, and then turn it back ON.
00 ~ 21
(00) Displays when there is no
malfunction.

70 Control number
• Displays the program control number. 00 ~ 255

Stock cam timing:
intake:     102 degrees
exhaust:  103 degrees
Factory Pro V Stack set
TRUE HP:    130

Test:
Factory Pro V Stack set
BMC Race Filter
Cam Timing Specs
intake:     102 degrees
exhaust:  105 degrees
TRUE HP:    134

#38?