Yamaha 2014 MT-07 Service Manual page 462

Fault code No.
Item
3 Defective fuel injector #1 and/or
fuel injector #2.
4 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
5 Wire harness continuity.
6 Malfunction in ECU.
7 Delete the fault code.
Fault code No. 41
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Probable cause of malfunc-
Item
tion and check
39
Fuel injector: open or short circuit detected.
Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to "CHECKING THE
FUEL INJECTORS" on page
8-141.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between fuel injector coupler
and sub-wire harness coupler.
Fuel injector #1
red/black–red/black
red/blue–red/blue
Fuel injector #2
green/black–green/black
red/blue–red/blue
Between sub-wire harness cou-
pler and ECU coupler.
Fuel injector #1
red/black–red/black
red/blue–red/blue
Fuel injector #2
green/black–green/black
red/blue–red/blue
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-128.
41
Lean angle sensor: open or short circuit detected.
Unable to start engine
Unable to drive vehicle
08
Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Remove the lean angle sensor and incline it more than 65 degrees.
Maintenance job
8-57
FUEL INJECTION SYSTEM
Execute the diagnostic mode.
(Code Nos. 36, 37)
No operating sound → Go to
item 4.
Operating sound → Go to item
7.
Execute the diagnostic mode.
(Code Nos. 36, 37)
No operating sound → Go to
item 5.
Operating sound → Go to item
7.
Execute the diagnostic mode.
(Code Nos. 36, 37)
No operating sound → Go to
item 6.
Operating sound → Go to item
7.
Start the engine and let it idle for
approximately 5 seconds.
Check that the fault code num-
ber is not displayed.
Confirmation of service com-
pletion