Yanmar 3TNV82A Troubleshooting Manual page 198

FAILURE DIAGNOSIS
4. Movement check of the rack actuator:
• Connect the all connectors (rack actuator, E-ECU).
• Connect the diagnosis tool, and log in to the diagnosis tool after key switch turning-on.
• Execute the directive rack position control with the diagnosis tool "Diagnosis Test: Active control".At
this time, set the rack position arbitrarily within the settings.
• After the execution, check if the rack actuator moved to the set rack position.
NG
OK
1-196
Replace the fuel injection pump.
Replace the E-ECU.
Method and Procedure of Failure Diagnosis
TNV DI Service Manual