SANY LATIN AMERICA
7-31
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
User Code
Service Code
Trouble
Throttle motor loading circuit is abnormal and the
engine acceleration fails.
12
E212
Failure description
When the power is on, magnitude of throttle motor coil current is out of the
range of 0.1A~1.8A and lasts for 2 seconds.
Response from controller The controller stops the motor driving system when this failure is detected.
Symptom of machine
Engine acceleration fails and the machine acts slowly.
Possible causes and standard value in normal state
Cause
Standard value in normal state/Remarks on troubleshooting
1
Failure of throt-
tle motor coil
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Between CN-445M
③
and
⑥
Resistance
12.2
Ω
2
Open circuit of
harness
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Unplug the controller and measure the resistance
between pin 113 and pin 105.
Resistance
12.2
Ω
3
Short circuit
of harness
(grounded)
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Unplug the connector CN-445M and measure the
resistance between motor
③
(
⑥
) and the hous-
ing.
Resistance
≥
2M
Ω
4
Internal failure
of controller
No troubleshooting can be done for failure occurs in the inner of controller.
(Except for the above reasons, the controller must be replaced in case of
failure.)
5
E212 (throttle motor current & motor connection abnormal)
75
55
113
55
105
1
2
3
4
5
6
1
2
3
4
5
6
50#
507#
MT-
0#
MT+
CN-445M
M
MT+
MT-
ZX215-1005071
CONTROLLER
THROTTLE MOTOR
GREEN
WHITE
RED
YELLOW
BLUE
CAB
CHASSIS HARNESS
GND WIRE
SENSOR 5V
THRTL FEEDBACK VOLT.
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