SANY LATIN AMERICA
7-90
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
E-23 Incorrect swing pilot pressure reading
Trouble
Swing pilot pressure reading is incorrect.
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-123M
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-123M
②
and controller pin 68
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-123M
②
and ground
Resistance
≥
2M
Ω
4
Failure of sensor
●
Turn engine start switch to OFF position. Then, keep it at ON position
to perform troubleshooting.
Between CN-123M
②
and ground
Voltage
0.5V~ 4.5V
5
CN-123M
(
DF-3
)
5V
2
3
1
75
55
68
ZX215-1005114
CHASSIS HARNESS
CAB
SIGNAL
GND WIRE
CONTROLLER
SENSOR 5V
SENSOR GND WIRE
SWING PILOT
PRESS SENSOR
SWING PILOT
PRESS SENSOR
https://www.tractormanualpdf.info/