Infiniti I30 (A33). Manual — part 330
Diagnostic Procedure
NHEC0638
1
CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch “ON”.
3. Check voltage between ECM terminal 81 and ground with CONSULT-II or tester.
SEC014C
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch “OFF”.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.
SEF287X
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.
SEF618X
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REFRIGERANT PRESSURE SENSOR
Diagnostic Procedure
EC-635
3
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E15, F18
I
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair harness or connectors.
4
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E8, F17
I
Harness for open or short between ECM and refrigerant pressure sensor
I
Harness for open or short between TCM (Transmission control module) and refrigerant pressure sensor
©
Repair open circuit or short to power in harness or connectors.
6
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 81 and refrigerant pressure sensor terminal 2. Refer to Wiring Dia-
gram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
GO TO 7.
7
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E8, F17
I
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-80, “Refrigerant pressure sensor”.
OK or NG
OK
©
GO TO 9.
NG
©
Replace refrigerant pressure sensor.
9
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
REFRIGERANT PRESSURE SENSOR
Diagnostic Procedure (Cont’d)
EC-636
Wiring Diagram
NHEC0604
FOR USA
NHEC0604S01
MEC398D
SEF642XB
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ELECTRICAL LOAD SIGNAL
Wiring Diagram
EC-637
FOR CANADA
NHEC0604S02
MEC399D
SEF642XB
ELECTRICAL LOAD SIGNAL
Wiring Diagram (Cont’d)
EC-638
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