2G-Type Eco-Governor Black Smoke Factor Analysis - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

2G-Type Eco-Governor Black Smoke Factor Analysis

No.
Black-smoke emission
1
from engine
2
3
4
5
6
7
8
9
10
11
12
1-216
Insufficient fuel supply Fuel pipe clogging
Engine failure Nozzle failure etc.
Working machine Load fluctuation in
failure working machine
Unstable injection due
Fuel pump failure
to defective rack etc.
Wire breakage or short-
CSD solenoid valve
circuit in CSD solenoid
system failure
valve
Wire breakage or short-
circuit in harness, or
connector contact
failure
Wire breakage or short-
EGR step motor
circuit in ECR step
system failure
motor
Wire breakage or short-
circuit in harness, or
connector contact
failure
Rack actuator
Rack actuator system malfunction due to
failure excessive hysteresis
etc.
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
Check method
Check fuel system.
Check whole engine.
Check whole working
machine.
Check fuel pump.
CSD solenoid valve system
Check conduction of CSD. error: P1242/4, P1243/3,
P1244/2
Check error occurrence, tool CSD solenoid valve system
data, harness shaking, and error: P1242/4, P1243/3,
conduction with tester. P1244/2
ECR step motor system error:
Check conduction of ECR step
P1402/4, P1403/3, other
motor.
phase errors
Check error occurrence, tool ECR step motor system error:
data, harness shaking, and P1402/4, P1403/3, other
conduction with tester. phase errors
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 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
TNV DI Service Manual
Factor Analysis
Relevant DTC Remarks