SANY LATIN AMERICA
7-86
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
E-19 Incorrect boom-raise pilot pressure reading
Trouble
Incorrect Boom-Raise Pilot Pressure Reading
Related information
Possible causes and standard value in normal
state
Cause
Standard value in normal state/Remarks on troubleshooting
1
Failure of 5V
power supply
●
Turn engine start switch to OFF position. Then, keep it at ON position to
perform troubleshooting.
Between CN-126M
①
and
③
Voltage
About 5V
2
Open circuit of
signal wire
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Between CN-126M
②
and controller pin 70
Resistance
≤
1
Ω
3
Short circuit of
signal wire
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Between CN-126M
②
and ground
Resistance
≥
2M
Ω
4
Failure of sen-
sor
●
Turn engine start switch to OFF position. Then, keep it at ON position to
perform troubleshooting.
Between CN-126M
②
and ground
Voltage
0.5V~ 4.5V
5
CN-126M
(
DF-3
)
2
3
1
75
55
70
ZX215-1005110
CHASSIS HARNESS
CAB
SIGNAL
5V
GND WIRE
CONTROLLER
SENSOR 5V
SENSOR GND WIRE
BOOM UP
PRESS SENSOR
BOOM UP
PRESS SENSOR
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