Yanmar 3TNV82A Troubleshooting Manual page 216

FAILURE DIAGNOSIS
No.
14
15
16
17
18
19
20
21
22
23
24
25
26
27
1-214
Rack actuator
Rack actuator system malfunction due to
failure excessive hysteresis
etc.
Wire breakage or short-
circuit in harness, or
connector contact
failure
Actuator relay system Contact failure of relay
failure contact
Wire breakage or short-
circuit in relay coil
Wire breakage or short-
circuit in harness, or
connector contact
failure
Speed sensor system Reversed polarity of
failure speed sensor harness
Wire breakage or short-
circuit in speed sensor
Wire breakage or short-
circuit in harness, or
connector contact
failure
Cooling-water Wire breakage or short-
temperature sensor circuit in cooling-water
system failure temperature sensor
Wire breakage or short-
circuit in harness, or
connector contact
failure
Wire breakage or short-
Atmospheric-pressure
circuit in atmospheric-
sensor system failure
pressure sensor
Wire breakage or short-
circuit in harness, or
connector contact
failure
Invalid contact input
Working machine
signal from working
controller failure
machine
Wire breakage or short-
circuit in harness, or
connector contact
failure
Check method
Check rack actuator operation Rack actuator system error:
and hysteresis. P1212/4, P1213/3, P1211/7
Check error occurrence, tool
Rack actuator system error:
data, harness shaking, and
P1212/4, P1213/3, P1211/7
conduction with tester.
Check error occurrence, tool
Rack actuator system error:
data, impact on relay, and
P1212/4, P1213/3, P1211/7
conduction with tester.
Check error occurrence, tool
Actuator relay system error:
data, impact on relay, and
P1222/4, P1223/3, P1224/2
conduction with tester.
Check error occurrence, tool
Actuator relay system error:
data, harness shaking, and
P1222/4, P1223/3, P1224/2
conduction with tester.
Check polarity difference
between harness drawing and
actual harness.
Check error occurrence, tool
Speed sensor system error:
data, and conduction with
P0340/4
tester.
Check error occurrence, tool
Speed sensor system error:
data, harness shaking, and
P0340/4
conduction with tester.
Check error occurrence, tool Cooling-water temperature
data, and conduction with sensor system error: P0117/4,
tester. P0118/3, P0119/2
Check error occurrence, tool Cooling-water temperature
data, and conduction with sensor system error: P0117/4,
tester. P0118/3, P0119/2
Check error occurrence, tool Atmospheric-pressure sensor
data, and conduction with system error: P2228/4,
tester. P2229/3, P2230/2
Check error occurrence, tool Atmospheric-pressure sensor
data, and conduction with system error: P2228/4,
tester. P2229/3, P2230/2
Check presence of failure in
working machine controller.
Check tool data and
conduction with tester.
TNV DI Service Manual
Factor Analysis
Relevant DTC Remarks
Occurs only at
low
temperatures.