Yanmar 3TNV82A Troubleshooting Manual page 204

FAILURE DIAGNOSIS
4. Check of harness continuity:
• Remove the E-ECU main relay from the harness and remove the E-ECU from the harness.
• Check the harness continuity using a circuit tester.
Terminal
Between relay coil (downstream side)
E34 and GND/E28/E45/E47
Between relay contact (downstream
side) E48 and E43/battery(+)
NG
OK
1-202
• Check if the harness is damaged, or if the wiring is correct.
• Replace the harness.
• Connect the all connectors (E-ECU main relay, E-ECU), and recheck that any
error is detected with the diagnosis tool "Fault code: Current fault indication"
again.
• Replace the E-ECU.
Method and Procedure of Failure Diagnosis
Continuity
Unavailable OK: normal
Available NG: harness short-circuited with GND
Unavailable OK: normal
NG: Harness short-circuited with power
Available
supply
TNV DI Service Manual
Status