Yanmar 3TNV82A Troubleshooting Manual page 192

FAILURE DIAGNOSIS
Work Description
1. Continuity check (contact input switch only):
• Remove the harness from each contact input switch.
• Referring to the following table, check the continuity between contact input terminal and body frame
using a circuit tester.
Item
Oil pressure switch
Charge Switch
Water Temperature
Switch
Air cleaner switch
Oil-Water Separator
Switch
NG
OK
2. Continuity check (contact input switch + harness):
• Connect the contact input switch and the harness, and remove E-ECU from the harness.
• Check the continuity between harness ECU connector terminal and body frame using a circuit tester.
Then, for the terminal name to be checked, refer to above-mentioned [1. Continuity check (contact
input switch only):].
NG
OK
1-190
Terminal name
(Terminal No.)
APP-IP2 (E14)
APP-IP3 (E09)
APP-IP4 (E17)
APP-IP5 (E05)
APP-IP6 (E06)
Replace the contact input switch.
Check the continuity with the contact input switch and the harness being connected.
→ Go to [2. Continuity check (contact input switch + harness):]
Check the harness for correct continuity. → Go to [3. Check of harness continuity:]
Check if the movement of the contact input switch is correctly recognized with the
diagnosis tool "Diagnosis Test". → Go to [4. Movement check of the contact input
switch:]
Method and Procedure of Failure Diagnosis
Continuity
[Between terminal and body
frame]
Available
Unavailable
Unavailable
Available
Unavailable
Available
Unavailable
Available
Unavailable
Available
Status
OK: normal
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
TNV DI Service Manual