Marelli control unit
Function
It controls the Ride by wire system, the injection/ ignition, the system safety checks and the self-diagnosis function.
Location
left side, next to the engine.
Connector location
ENGINE connector: upper connector with control unit on the vehicle; a letter E is stamped on the control unit, to the right of the connector.
VEHICLE connector: lower connector with control unit on the vehicle; a letter V is stamped on the control unit, to the right of the connector.
Pin-out: see the CONNECTORS section.
Axone: statuses
Engine status
Example value: Indefinite_Key ON_Running engine_Stopped_Power latch_Power latch 2_Power latch finished
Engine mode
Example value: Indefinite_Start-up_Stable_Idle_Acceleration_Deceleration_Enters Cut Off_Cut Off_Exits Cut Off
Immobilizer signal
Example value: yes/no
Indicates whether the control unit has received the consent by the instrument panel regarding the immobilizer: coded key or user code entered manually. Potential errors will be shown on the Instrument Panel Errors screen page, on the DIAGNOSIS section of the instrument panel.
Start-up signal
Example value: yes/no
Indicates whether the control unit will enable start-up when requested: in case the safety measures are not respected (side stand, neutral sensor and clutch in correct position) or if the immobilizer does not send the start-up consent to the control unit, the status is NO.
Axone: electrical errors
EEPROM Error P0601 - circuit not operational.
Error cause
Replace injection ECU. The instrument panel does not indicate the presence of this error even in the ATT status.
RAM Error P0604 - circuit not operational.
Error cause
Replace injection ECU. The instrument panel does not indicate the presence of this error even in the ATT status.
ROM Error P0605 - circuit not operational.
Error cause
Replace injection ECU. The instrument panel does not indicate the presence of this error even in the ATT status.
A/D converter P0607 - circuit not operational.
Error cause
Replace injection ECU.
Level 2 safety reset P0608
Error cause
As the level 2 safety system (comparison between requested torque and calculated torque) has detected a fault, the control unit has reset engine (C gravity).
Troubleshooting
Continue failure search for the other errors detected.
Safety Engine Stop P0609
Error cause
As the level 3 safety system (control EEPROM) has detected a fault, the control unit has shut off the engine (D gravity).
Troubleshooting
Replace Marelli control unit.
Reset lines error P0610 - circuit not operational
Error cause
Problems on the reset lines (PINS 55 and 56 of the VEHICLE connector) of the throttle motors: lines used to interrupt motor functioning for safety reasons.
Troubleshooting
Check the VEHICLE connector of the Marelli control unit, the filter housing large connector and the throttle control unit connector: if not OK, restore. If OK, check continuity between the Marelli control unit and the throttle control unit connector from VEHICLE PIN 55 to PIN B7 and from PIN 56 to PIN A7: if not OK, restore. If OK, check that with throttle control unit connector disconnected and with key set to ON, there is no voltage on PINS A7 and B7: if there is voltage, replace the cable harness. If there is no voltage, check that PINS A7 and B7 are insulated from ground connection: if they are not insulated from the ground connection, replace the cable harness. If they are insulated, replace the throttle control unit or the Marelli control unit.
Axone: notes
After installing the control unit and setting the key to ON, wait for 3 seconds, time during which the control unit detects the throttle valve position.
Connect to Axone and check that the status for Throttle Self-learning is Carried out and the status for Throttle grip autodetection is Not carried out(this last status entails Urgent service being displayed on the instrument panel).
If Throttle Self-learning shows Not carried out, go to stage 1. If it shows Carried out, go to stage 2.
Stage 1: current errors have probably been detected by the control unit: solve these malfunctions and check the Throttle Self-learning status again. Throttle Self-learning can also be checked from the Parameter adjustment (screwdriver and hammer) screen page.
Stage 2: Carry out the Throttle Self-learning from the Parameter adjustment (screwdriver and hammer) screen page and check that Throttle Self-learning status is Carried out. If it is not correct or the voltage detected on the throttle is out of scale (check with Axone) or if current errors are probably detected by the control unit: solve these malfunctions and repeat the procedure.