YXZ Addicts Tech

MCU Codes

A fast Yamaha YXZ Sport Shift reference for MCU fault-code definitions, inspection priorities, and related technical resources.

Fast reference: A fault code identifies the system that needs testing; it does not automatically prove the named component has failed. Record the complete Sh_ code before disconnecting power, then inspect battery voltage, grounds, connectors, wiring, actuator movement, and recent repairs before replacing components.

Sh_11

Charging-system voltage is outside the normal range.

Sh_12

MCU power cut-off function malfunction.

Sh_13

Excess current detected at the clutch-actuator motor.

Sh_14

Excess current detected at the shift-actuator motor.

Sh_15

Fault in the MCU circuit that monitors clutch/shift actuator current.

Sh_16

Abnormal current in a clutch- or shift-actuator motor drive circuit.

Sh_17

Clutch-actuator position reading is incorrect.

Sh_18

Shift-actuator position reading is incorrect.

Sh_19

Shift-actuator sensor voltage is too low or too high.

Sh_21

Gear-position sensor voltage is too low or too high.

Sh_25

Abnormal actuator-drive current detected when the ignition is switched on.

Sh_26

Abnormal clutch movement during startup check; clutch position may not hold.

Sh_31

Engine-speed signal is abnormal.

Sh_32

Vehicle-speed signal is abnormal.

Sh_35

Start-switch signal is abnormal.

Sh_36

Clutch-actuator sensor circuit is open or shorted, or its two signals do not agree.

Sh_37

Power supply to the clutch or shift actuator motor is abnormal.

Sh_42

MCU cannot receive ECU data, or the ECU has reported a malfunction.

Sh_44

Clutch-actuator sensor position is incorrect.

Sh_45

Requested shift and detected gear position do not agree.

Sh_46

Detected gear-position sensor position is incorrect.

Sh_48

Engine idle speed is too high.

Sh_49

Engine speed is too high when starting the vehicle.

Sh_51

Detected shift-actuator sensor position is incorrect.

Sh_52

Main-switch signal is abnormal.