7 - 22
FI
FUEL INJECTION SYSTEM
Fault code No.
44
Symptom
Error is detected while reading from or writing on EEPROM
(code re-registering key code and throttle valve fully closed notification value).
Used diagnostic No. 60 (EEPROM improper cylinder indication)
Order
Inspection operation item and
probable cause
Operation item and countermeasure
Reinstatement
method
1
Malfunction in ECU
Execute diagnostic mode (code No. 60)
• 01 is displayed on meter.
Readjust the CO of the displayed cylinder.
Refer to “ADJUSTING THE EXHAUST GAS
VOLUME” in chapter 3.
Replace ECU if defective.
• 03 is displayed on meter.
Replace the ECU.
• 04 is displayed on meter.
Turn the main switch to ON, and turn the throt-
tle grip to full open and then to full close posi-
tion.
Replace ECU if defective.
Reinstated by turn-
ing the main switch
ON.
Fault code No.
46
Symptom
Power supply to the FI system relay is not normal.
Used diagnostic code No. – –
Order
Inspection operation item and
probable cause
Operation item and countermeasure
Reinstatement
method
1
Connected condition of connector
Inspect the coupler for any pins
that may have pulled out.
Check the locking condition of the
coupler.
If there is a malfunction, repair it and connect it
securely.
ECU coupler
Reinstated by
starting the engine
and operating it at
idle.
2
Faulty battery
Replace or charge the battery.
Refer to “CHECKING AND CHARGING THE BAT-
TERY” in chapter 3.
3
Open or short circuit in wiring har-
ness.
Repair or replace if there is an open or short circuit.
• Between battery and main switch
red – red
• Between main switch and fuse (ignition)
brown/blue – brown/blue
• Between fuse (ignition) and engine stop switch
red/white – red/white
• Between engine stop switch and fuel injection
system relay
red/black – red/black
• Between fuel injection system relay and ECU
red/yellow – red/yellow
Summary of Contents for 2004 YP400
Page 1: ...2004 YP400 S 5RU1 AE1 SERVICE MANUAL ...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1 ...
Page 11: ...GEN INFO ...
Page 28: ...SPEC 2 ...
Page 30: ...SPEC ...
Page 77: ...CHK ADJ 3 ...
Page 137: ......
Page 138: ...CHAS 4 ...
Page 210: ......
Page 211: ...ENG 5 ...
Page 286: ...COOL 6 ...
Page 288: ...COOL ...
Page 299: ...FI 7 ...
Page 301: ...FI ...
Page 342: ...ELEC 8 ...
Page 378: ...8 34 ELEC LIGHTING SYSTEM ...
Page 404: ......
Page 405: ...TRBL SHTG 9 ...
Page 415: ......
Page 416: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...