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13. MALFUNCTION OF BOOM DOWN PRESSURE SENSOR
Fault code : HCESPN 128, FMI 0~4
·
Before carrying out below procedure, check all the related connectors are properly inserted.
※
1)
INSPECTION PROCEDURE
YES
Check voltage
between CN-53
(23) - GND
SPEC :
Check voltage
Actuator operating: 1~5V
between CD-85
See TEST 17
NO
(A)-(B)
SPEC :
Starting switch ON :
24±2V
Wiring diagram
CN-53
3
13
23
MCU
YES
NO
6-63
Cause
Defective MCU
Detective boom up
pressure sensor
Short circuit or
poor connection
between CN-53
(23)-CD-85 (B)
Short circuit or
poor connection
between CD-85
(A)-CN-53(3) or
CD-85(C)- CN-53
(13)
CD-85
A
SUPPLY
B
SIG
C
RETURN
BOOM DOWN PRESSURE SENSOR
Remedy
Replace
Replace or repair
Replace or repair
Replace or repair
300L6MS25
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