Hyundai HX145LCR Manual page 410

9. MALFUNCTION OF NEGATIVE 2 PRESSURE SENSOR 9. MALFUNCTION OF NEGATIVE 2 PRESSURE SENSOR
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Fault code : HCESPN 124, FMI 0~4
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Before carrying out below procedure, check all the related connectors are properly inserted.
1) 1) INSPECTION PROCEDURE INSPECTION PROCEDURE
YES
Check voltage
between CN-52
(17) - GND
SPEC :
Actuator operating: 1~5V
See TEST 13
Check voltage
between
NO
CN-1(4)-(6)
SPEC :
Starting switch ON :
24±2V
Wiring diagram Wiring diagram
CN-51
3
13
MCU
17
CN-52
YES
SPEC :
Actuator operating: 1~5V
Check voltage
YES
between
CD-44(A)-(C)
SPEC :
Starting switch ON :
24±2V
NO
NO
4
2
6
CN-1
6-55
Defective MCU
YES
Short circuit or
poor connection
Check voltage
between CN-52-
between
(17)-CN-1(2)
CN-1(2)-GND
Detective N2
NO
pressure sensor
Short circuit or
poor connection
between CN-1(2)-
CD-71(B)
Short circuit or
poor connection
between
CD-71(A)-CN-1(4)
or CD-71(C)-CN-
1(6)
Short circuit or
poor connection
between CN-1(4)-
CN-51(3) or CN-1
(6) - CN-51(13)
CD-71
A
SUPPLY
B SIG
C RETURN
NEGATIVE 2 PRESSURE SENSOR
Cause Remedy
Replace
Replace or repair
Replace or repair
Replace or repair
Replace or repair
Replace or repair
300L6MS13