Hyundai Yanmar 3TNV82A-B, Manual

Page: 77 / 162

CONTROL SYSTEM
2-58
TNV Application Manual
7 Backup speed
sensor failure Engine start signal
(E8) is on, but the
engine speed is
zero. Engine continues to run while main speed
sensor is used.
Backup speed sensor failed: Engine stops. Turn key off. Default to
disable
1-1
Engine speed
decreases by 480
min
-1
or more in 40
ms.
8 CAN communica-
tion failure CAN communica-
tion packets cannot
be received. Last value is retained. Backup sensor
becomes active. Correct failure. Default to
enable
1-2
9 EGR valve failure Low status is
detected even
through port is off. Engine runs with limited output(92%) and
speed(1800min
-1
).
Turn key off. Default to
disable
1-3
High status is
detected even
through port is on.
10 CSD solenoid valve
failure High status is
detected even
through port is off. Engine continues to run with port being off. Turn key off. Always
enable
1-4
Low status is
detected even
through port is on.
11 Air heater relay
failure High status is
detected even
through port is off. Engine runs with air heater relay being off. Turn key off. Default to
enable
1-5
Low status is
detected even
through port is on.
12 Main relay failure Power is not shut off
even though main
relay is off. Engine runs normally. Correct fail-
ure.Or turn key
off. Default to
disable
1-6
13 Rack actuator relay
failure Low status is
detected even
through port is off. Engine stops. Turn key off. Always
enable
1-7
High status is
detected even
through port is on.
14 Backup accelerator
sensor failure Sensor voltage is
4.6 V or more, or
0.2 V or less. Engine continues to run while main acceler-
ator sensor is used.
Main accelerator sensor failure: Engine runs
at 1500 min
-1
.(Option can change)
Correct failure. Default to
enable
1-8
15 Atmospheric pres-
sure sensor failure Atmospheric pressure compensation is
canceled. Turn key off. Default to
enable
1-9
16 Oil pressure switch
failure Oil pressure switch
fails to turn on when
engine is off. Engine runs normally.(Option can change) Turn key off. Default to
enable
2-1
17 Charge switch
failure Charge switch fails
to turn on when
engine is off. Engine runs normally. Turn key off. Default to
enable
2-2
18 Power supply volt-
age abnormal E-ECU supply volt-
age exceeds 10.0 V. Engine runs normally. Correct failure. Always
enable
2-3
E-ECU supply volt-
age exceeds 16.0 V.
Table 2-12 Diagnostic list
No. Item
Failure detection
conditions
Operation when failure occurs
Action/
condition for
recovery
Category
Number
of
flashes
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