Yamaha F400A 2022 - Checking the Knock Sensor; Checking the Engine Shut-Off Switch (6 X6); Checking the Engine Shut-Off Switch (EKS)

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Ignition unit and component
Checking the knock sensor
1. Check:
• Knock sensor
a. Disconnect the knock sensor couplers
“a” and “b”.
b. Measure the knock sensor resistance.
Replace if out of specification.
Checking the engine shut-off switch
(6X6)
1. Check:
• Engine shut-off switch
a. Disconnect the main switch coupler or
engine start switch coupler.
b. Turn the main switch to ON, and then
check the engine shut-off switch for
continuity. Replace if out of specifica-
tion.
c. Turn the main switch to OFF.
d. Connect the main switch coupler or en-
gine start switch coupler.
Checking the engine shut-off switch
(EKS)
1. Check:
• Engine shut-off switch continuity
Out of specification → Replace.
Resistance
504–616 kΩ
a
b
A. Engine start switch
B. Main switch
Switch posi-
tion
Terminal
ab
Clip re-
moved
Clip installed
Engine shut-off switch continuity
Clip removed:
Terminal “a”–Terminal “b”
Terminal “c”–Terminal “d”
Terminal “e”–Terminal “f”
Terminal “g”–Terminal “h”
Terminal “i”–Terminal “j”
b
a
a
B
b
A
3. START
2. ON
1. OFF
1. OFF
2. ON