Yanmar 3TNV82A Troubleshooting Manual page 229

Failure Diagnostic List
Defective start
Symptoms and conditions of failures
Starter not Starter
rotate rotates
Cause
ECU control function operating
Disconnection/short-circuit of water
temperature sensor
Disconnection/short-circuit of
accelerator sensor
Speed sensor signal error
Rack position sensor signal error
Operation defect of rack actuator
Engine over speed
CAN communication error
Disconnection/short-circuit of EGR
valve motor
Disconnection/short-circuit of CSD
solenoid valve
Disconnection/short-circuit of start
assist relay
Main relay "OFF" not available
Disconnection/short-circuit of rack
actuator relay
Malfunction by ECU self-diagnosis
TNV DI Service Manual
Engine stall Insufficient
Defective rotation control Noise/vibration
after start engine output
Exhaust
Without load At work Exhaust color
fume
Cooling
Lubricant Intake Exhaust Fuel
water
At work
FAILURE DIAGNOSTIC LIST
Electrics/electronics
Action
Not failure Check the causes of engine stop or
Implement regular usage starter restraint by a diagnosis tool.
Repair or replacement of harness For harness inspection method, see
Replacement of water temperature sensor "Failure Diagnosis" (on page 1-1).
Repair or replacement of harness For harness inspection method, see
Replacement of accelerator sensor "Failure Diagnosis" (on page 1-1).
Repair or replacement of harness For harness inspection method, see
Repair or replacement of fuel injection "Failure Diagnosis" (on page 1-1).
pump
Repair or replacement of harness For harness inspection method, see
Repair or replacement of fuel injection "Failure Diagnosis" (on page 1-1).
pump
Repair or replacement of harness For harness inspection method, see
Repair or replacement of fuel injection "Failure Diagnosis" (on page 1-1).
pump
Check operating machine's driving.
Check speed sensor signal.
Repair or replacement of harness For harness inspection method, see
ECU Replacement "Failure Diagnosis" (on page 1-1).
Repair or replacement of harness For harness inspection method, see
Replacement of EGR valve "Failure Diagnosis" (on page 1-1).
Repair or replacement of harness For harness inspection method, see
Replacement of CSD valve solenoid "Failure Diagnosis" (on page 1-1).
Repair or replacement of harness For harness inspection method, see
Relay replacement "Failure Diagnosis" (on page 1-1).
Relay replacement
Repair or replacement of harness For harness inspection method, see
Relay replacement "Failure Diagnosis" (on page 1-1).
ECU Replacement
Referenced page number
1-227