Infiniti QX4 (R50). Manual — part 478
10
CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP.
Check circuit continuity between ECM harness terminal No. 51 and auto amp. harness terminal No. 6 (17).
RHA879H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
Replace auto amp.
NG
©
1. Repair harness or connector.
2. Go to “STEP-BY-STEP PROCEDURE”, “Self-diagnosis”, HA-45 and perform self-diag-
nosis STEP 4.
Confirm that magnet clutch operation is normal.
11
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM
Check circuit continuity between A/C relay harness terminal No. 1 and ECM harness terminal No. 27.
RHA474GB
Continuity should exist.
OK or NG
OK
©
Check harness for short.
NG
©
Repair harness or connector.
SEF090M
COMPONENT INSPECTION
NBHA0068
A/C Relay
NBHA0068S01
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.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-110
RHA880H
SHA315F
Refrigerant Pressure Sensor
NBHA0068S02
Make sure that higher A/C refrigerant pressure results in higher
refrigerant-pressure sensor output voltage.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-111
Insufficient Cooling
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING
=NBHA0096
SYMPTOM:
I
Insufficient cooling
Inspection Flow
NBHA0096S01
Without Navigation System
NBHA0096S0101
SHA190FC
*1: HA-44
*2: HA-85
*3: HA-116
*4: HA-53
*5: STEP-BY-STEP PROCEDURE
(HA-45), see No. 13.
*6: HA-77
*7: HA-89
*8: HA-97
*9: HA-106
*10: HA-114
*11: HA-66
*12: HA-45
*13: HA-2
*14: MA-13
*15: LC-20
TROUBLE DIAGNOSES
Insufficient Cooling
HA-112
With Navigation System
NBHA0096S0102
RHA881H
*1: HA-44
*2: HA-85
*3: HA-116
*4: HA-53
*5: STEP-BY-STEP PROCEDURE
(HA-45), see No. 13.
*6: HA-77
*7: HA-89
*8: HA-97
*9: HA-106
*10: HA-114
*11: HA-66
*12: HA-45
*13: HA-2
*14: MA-13
*15: LC-20
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-113
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