Infiniti I30 (A33). Manual — part 530
7
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL
Do approx. 0 volts exist between ECM harness terminal No. 51 and ground?
SHA432F
Yes or No
Yes
©
GO TO 8.
No
©
1. Repair harness or connector.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 4.
Confirm that magnet clutch operation is normal.
8
CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-80.
OK or NG
OK
©
GO TO 9.
NG
©
Replace refrigerant pressure sensor.
9
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM
Check circuit continuity between A/C relay harness terminal No. 2 and ECM harness terminal No. 27.
RHA403H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
Check ECM. Refer to EC-132, “ECM Terminals and Reference Value”.
NG
©
Repair harness or connector.
Replace auto amp.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-79
SEF090M
COMPONENT INSPECTION
NHHA0204
A/C Relay
NHHA0204S01
Check continuity between terminal Nos. 3 and 5.
Conditions
Continuity
12V direct current supply between terminal Nos. 1 and 2
Yes
No current supply
No
If NG, replace relay.
RHA404H
SHA315F
Refrigerant Pressure Sensor
NHHA0204S02
Make sure that higher A/C refrigerant pressure results in higher
refrigerant-pressure sensor output voltage.
Refer to EC-635, “Diagnostic Procedure”.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-80
Insufficient Cooling
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING
=NHHA0205
SYMPTOM:
I
Insufficient cooling
INSPECTION FLOW
RHA952H
*1: HA-36
*2: HA-62
*3: HA-84
*4: HA-45
*5: FUNCTION CONFIRMATION
PROCEDURE (HA-37), see No.
13.
*6: HA-55
*7: HA-67
*8: HA-76
*9: HA-82
*10: HA-47
*11: HA-37
*12: HA-2
*13: MA-13
*14: EC-489
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Insufficient Cooling
HA-81
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