Nissan Primera P11. Manual — part 198
Diagnostic Procedure
NLEC0590
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 74 and ground with CONSULT-II or tester.
SEF952XA
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.
JEF147Y
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.
NEF243A
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
REFRIGERANT PRESSURE SENSOR
QG16
I
18DE
Diagnostic Procedure
EC-349
3
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E90, F73
I
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair harness or connectors.
4
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
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 E42, F4
I
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair open circuit or short to power in harness or connectors.
6
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 74 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 E42, F4
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 section, “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-QG-102.
©
INSPECTION END
REFRIGERANT PRESSURE SENSOR
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-350
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0548
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
LOAD SIGNAL
I
Ignition switch: ON
Rear window defogger is operating
and/or lighting switch is on.
ON
Rear window defogger is not oper-
ating and lighting switch is not on.
OFF
HEATER FAN SW
I
Ignition switch: ON
Blower fan motor is operating
ON
Blower fan motor is not operating
OFF
ECM Terminals and Reference Value
NCEC0549
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
50
R
Electric load signal
(Load switch)
[Engine is running]
I
Rear window defogger is operating and/or lighting
switch is on
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Rear window defogger is not operating and lighting
switch is not on
Approximately 0V
51
LG/B
Blower fan motor switch
[Engine is running]
I
Blower fan motor is operating
Approximately 0V
[Engine is running]
I
Blower fan motor is not operating
Approximately 5V
ELECTRICAL LOAD SIGNAL
QG16
I
18DE
CONSULT-II Reference Value in Data Monitor Mode
EC-351
Wiring Diagram
NCEC0550
YEC255
ELECTRICAL LOAD SIGNAL
QG16
I
18DE
Wiring Diagram
EC-352
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