Yanmar 3TNV82A Troubleshooting Manual page 148

FAILURE DIAGNOSIS
Work Description
1. Continuity check (foot pedal only):
• Remove the foot pedal from the harness.
• Check the foot pedal continuity with a specified pedal opening using a circuit tester.
Pedal opening
Full close position
Full open position
NG
OK
2. Continuity check (foot pedal + harness):
• Connect foot pedal and harness, and remove E-ECU from the harness.
•Check the foot pedal continuity with a specified pedal opening using a circuit tester.
Pedal opening
Full close position
Full open position
NG
OK
1-146
Between A and GND Between B and GND
Unavailable
Unavailable
Available
Available
Available
Unavailable
Unavailable
Available
Replace the foot pedal.
Check the continuity with the foot pedal and the harness being connected. → Go to
[2. Continuity check (foot pedal + harness):]
Between E-14 and GND Between E-13 and GND
Unavailable
Unavailable
Available
Available
Available
Unavailable
Unavailable
Available
Check the harness for correct continuity. → Go to [3. Check of harness continuity:]
Check if the foot pedal movement is correctly recognized with the diagnosis tool
"Diagnosis Test". → Go to [4. Foot pedal movement check:]
Method and Procedure of Failure Diagnosis
Continuity
Available
Unavailable
Unavailable
Available
Unavailable
Unavailable
Available
Available
Continuity
Available
Unavailable
Unavailable
Available
Unavailable
Unavailable
Available
Available
Status
OK: normal
NG: Internal circuitry fault
NG: Internal circuitry fault
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
NG: Internal circuitry fault
NG: Internal circuitry fault
Status
OK: normal
NG: Internal circuitry fault
NG: Internal circuitry fault
NG: Internal circuitry fault
OK: normal
NG: Internal circuitry fault
NG: Internal circuitry fault
NG: Internal circuitry fault
TNV DI Service Manual