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6. MALFUNCTION OF PUMP 2 PRESSURE SENSOR
Fault code : HCESPN 121, FMI 0~4
·
Before carrying out below procedure, check all the related connectors are properly inserted.
※
1)
INSPECTION PROCEDURE
YES
Check voltage
between CN-52
(12) - GND
SPEC :
Actuator operating: 1~5V
See TEST 10
Check voltage
between
NO
CN-1(4)-(6)
SPEC :
Starting switch ON :
24±2V
Wiring diagram
CN-51
3
13
MCU
12
CN-52
YES
SPEC :
Actuator operating: 1~5V
Check voltage
YES
between
CD-43(A)-(C)
SPEC :
Starting switch ON :
24±2V
NO
NO
4
3
6
CN-1
6-49
Defective MCU
YES
Short circuit or
poor connection
Check voltage
between CN-52-
between
(12)-CN-1(3)
CN-1(3)-GND
Detective P2
NO
pressure sensor
Short circuit or
poor connection
between CN-1(3)-
CD-43(B)
Short circuit or
poor connection
between
CD-43(A)-CN-1(4)
or CD-43(C)-CN-1
(6)
Short circuit or
poor connection
between CN-1(4)-
CN-51(3) or CN-1
(6) - CN-51(13)
CD-43
A
SUPPLY
B
SIG
C
RETURN
PUMP 2 PRESSURE SENSOR
Cause
Remedy
Replace
Replace or repair
Replace or repair
Replace or repair
Replace or repair
Replace or repair
300L6MS07
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