SANY LATIN AMERICA
7-71
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
E-5 Preheating function fails
Trouble
Engine does not preheat.
Related information
Possible causes and standard value in normal state
Cause
Standard value in normal state/Remarks on troubleshooting
1
Failure of pre-
heat fuse
●
Turn engine start switch to OFF position. Keep it at OFF position to perform
troubleshooting.
Between wire 21# and preheat relay pin 3# (contact)
Resistance
≤
1
Ω
2
Failure of pre-
heat relay
When the preheating function is activated, if operation of the preheat relay
contact is heard, the relay is normal. The preheat switch is to be switched
OFF
→
ON
→
OFF.
3
Failure of pre-
heat switch
●
Turn engine start switch to OFF position. Keep it at OFF position to perform
troubleshooting.
Turn off the preheat switch and measure the resistance
between wire 16# and wire 18#.
Resistance
≥
1M
Ω
Turn on the preheat switch and measure the resistance
between wire 16# and wire 18#
≤
1
Ω
4
Short circuit
of wire har-
ness (ground-
ed)
●
Turn engine start switch to OFF position. Keep it at OFF position to perform
troubleshooting.
Between preheat relay pin 3# (contact) and ground
Resistance
≥
1M
Ω
5
22
13
16
16
22
20
+
_
+
_
5
4
3
2
1
5
4
3
2
1
21
0
CN-241F
(D-12)
20
22
F1 20A
9
1
1
9
CN-142M
(D-12)
6 6
7
7
CN-131M
(D-12)
F13 160A
21
17
GR-1 GLOW PLUG
18
5
4
3
2
1
5
4
3
2
1
TERMINAL
HEAT
OFF
ON
START
B
BR ACC R1 R2 C
ZX215-1005097
CHASSIS HARNESS
CAB
SWITCH
PREHEAT RELAY
PREHEAT
BATTERY RELAY
BATTERY
PREHEATER
START SWITCH
CHASSIS HARNESS
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