[A] Checking The Cruise Control System Indicator Light; [B-1] Diagnosis Using The Dtc; [B-2] Diagnosis Using The Malfunction History Codes; [B-3] Malfunction History Is Not Displayed - Yamaha MT-09 2021 Service Manual

EAS32879

[A] CHECKING THE CRUISE CONTROL SYSTEM INDICATOR LIGHT

Turn the main switch, and then push the cruise control power switch.
1. The cruise control system indicator light does not come on.
• Check the control power switch for continuity. Refer to "CHECKING THE SWITCHES" on page 8-
53. If there is no continuity, replace the handlebar switch (left).
• Check the fuse for continuity. Refer to "CHECKING THE FUSES" on page 8-55. If the cruise con-
trol system fuse is blown, replace the fuse.
• Check for continuity between the orange/white terminal of the handlebar switch coupler (left) and
orange/white terminal of the ECU (engine control unit) coupler. If there is no continuity, the wire
harness is defective. Replace the wire harness.
2. The cruise control system indicator light flashes. [B-1]
3. The cruise control system indicator light come on. [B-2]
EAS32880

[B-1] DIAGNOSIS USING THE DTC

1. Information for the DTCs from the cruise control system is contained in the following table. Refer to
this table for troubleshooting.
DTC table
DTC No.
P056C No normal signals from the switch are
received by the ECU.
P0564 No normal signals from the switch are
received by the ECU.
EAS32881

[B-2] DIAGNOSIS USING THE MALFUNCTION HISTORY CODES

Check the malfunction history using the malfunction mode of the YDT.
• Malfunction history is displayed on the YDT. [B-1]
• Malfunction history is not displayed on the YDT. [B-3]
EAS32882

[B-3] MALFUNCTION HISTORY IS NOT DISPLAYED

Use the YDT to check whether automatic deactivation history for the cruise control system exists.
1. There is automatic deactivation history for the cruise control system.
• Explain the conditions for automatically deactivating the cruise control system to the customer.
• For information about the conditions for automatically deactivating the cruise control system.
TIP
If you do not have a YDT, the automatic deactivation history cannot be checked. Therefore, explain the
automatic deactivation function of the cruise control system to the customer and explain that this is not
a malfunction.
CRUISE CONTROL SYSTEM (for MTN890D)
Symptom
9-33
Check point
• Wire harness (ECU coupler and front or rear
brake light switch coupler)
• Signaling system fuse and brake light fuses
• Connection of the ECU coupler, rear brake
light switch coupler, brake light relay coupler
and handlebar switch coupler (right)
• Accelerator position sensor
• Front brake light switch
• Rear brake light switch
• Wire harness (ECU coupler and handlebar
switch coupler (left))
• Ignition fuse 1 and cruise control system
fuse
• Cruise control setting switch