Yamaha MBK X-MAX 300 2017, Service Manual

Page: 373 / 462

FUEL INJECTION SYSTEM
8-68
Fault code No. P1604, P1605
4 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between starting circuit cut-off
relay coupler and ECU coupler.
blue/yellow–blue/yellow
Between starting circuit cut-off
relay coupler and sidestand
switch coupler.
blue/green–blue/green
Turn the main switch to “ON”,
and then extend and retract the
sidestand.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 5.
5 Defective sidestand switch. Execute the diagnostic mode.
(Code No. 20)
Sidestand retracted: “ON”
Sidestand extended: “OFF”
Replace if defective. Turn the main switch to “ON”,
and then extend and retract the
sidestand.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 6.
6 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (Engine Control Unit)” on
page 8-128. Service is finished.
7 Delete the fault code and check
that the engine trouble warning
light goes off. Confirm that the fault code has
a condition of “Recover” using
the Yamaha diagnostic tool, and
then delete the fault code.
Fault code No. P1601
Item
No normal signals are received from the sidestand switch.
Sidestand switch: open or short circuit detected.
Fault code No. P1604, P1605
Item
[P1604] Lean angle sensor: ground short circuit detected.
[P1605] Lean angle sensor: open or power short circuit detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. 08
Tool display
Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Procedure Remove the lean angle sensor and incline it more than 50 degrees.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion