Yanmar 3TNV82A Troubleshooting Manual page 194

FAILURE DIAGNOSIS
4. Movement check of the contact input switch:
• Connect the all connectors (contact input switch, E-ECU).
• Connect the diagnosis tool, and log in to the diagnosis tool after key switch turning-on.
• With the diagnosis tool "Diagnosis Test: Digital Input etc.", monitor each of displayed items, check the
ON/OFF indication of the contact input switch under the specified conditions.
Item
Before engine
Oil pressure
switch
During engine
Before engine
Charge
Switch
During engine
Water
Before engine
Temperature
Switch
Air cleaner Before engine
switch
Oil-Water
Before engine
Separator
Switch
NG
OK
1-192
Check
ON/OFF indication
conditions
start
running
start
runnning
start
start
start
• Check if the harness is damaged, or if the wiring is correct.
• Replace the harness.
• Replace the contact input switch.
Replace the E-ECU.
Method and Procedure of Failure Diagnosis
ON OK: normal
OFF NG: Harness error or internal circuitry fault
OFF OK: normal
ON NG: Harness error or internal circuitry fault
ON OK: normal
OFF NG: Harness error or internal circuitry fault
OFF OK: normal
ON NG: Harness error or internal circuitry fault
OFF OK: normal
ON NG: Harness error or internal circuitry fault
OFF OK: normal
ON NG: Harness error or internal circuitry fault
OFF OK: normal
ON NG: Harness error or internal circuitry fault
Status
TNV DI Service Manual