2001 NISSAN ALMERA BR -

Wiring DiagramNJEC0582SEDAN MODELS AND HATCHBACK MODELS WITH ECM IN ENGINE COMPARTMENTNJEC0582S03
HEC806
REFRIGERANT PRESSURE SENSORQG
Wiring Diagram
EC-573

HATCHBACK MODELS WITH ECM IN CABINNJEC0582S04
HEC961
REFRIGERANT PRESSURE SENSORQG
Wiring Diagram (Cont'd)
EC-574

Diagnostic ProcedureNJEC0590
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 ªONº.
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 ªOFFº.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.
JEF147Y
4. Turn ignition switch ªONº.
5. Check voltage between refrigerant pressure sensor terminal 3 and ground with CONSULT-II or tester.
SEF953X
OK or NG
OK©GO TO 4.
NG©GO TO 3.
REFRIGERANT PRESSURE SENSORQG
Diagnostic Procedure
EC-575

3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E75, F36
+Joint connector-4 (If so equipped)
+Joint connector-6 (If so equipped)
+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 ªOFFº.
2. Check harness continuity between refrigerant pressure sensor terminal 1 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E75, F36
+Joint connector-3 (If so equipped)
+Joint connector-6 (If so equipped)
+Harness for open or short between ECM and refrigerant pressure sensor
+Harness for open or short between TCM (Transmission Control Module) and refrigerant pressure sensor
©Repair open circuit or short to ground 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.
+Harness connectors E75, F36
+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-66, ªRefrigerant pressure sensorº.
OK or NG
OK©GO TO 9.
NG©Replace refrigerant pressure sensor.
REFRIGERANT PRESSURE SENSORQG
Diagnostic Procedure (Cont'd)
EC-576

9 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-177.
©INSPECTION END
REFRIGERANT PRESSURE SENSORQG
Diagnostic Procedure (Cont'd)
EC-577

CONSULT-II Reference Value in Data Monitor
Mode
NJEC0548Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL+Ignition switch: ONRear 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+Ignition switch: ONHeater fan motor is operating. ON
Heater fan motor is not operating. OFF
ECM Terminals and Reference ValueNJEC0549Specification 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
COLORITEM CONDITION DATA (DC Voltage)
50 L/BElectric load signal
(Load switch)[Engine is running]
+Rear window defogger is operating and/or lighting
switch is onBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Rear window defogger is not operating and lighting
switch is not onApproximately 0V
51 LG/B Heater fan motor switch[Engine is running]
+Heater fan motor is operatingApproximately 0V
[Engine is running]
+Heater fan motor is not operatingApproximately 5V
ELECTRICAL LOAD SIGNALQG
CONSULT-II Reference Value in Data Monitor Mode
EC-578

Wiring DiagramNJEC0550SEDANNJEC0550S01
HEC892
ELECTRICAL LOAD SIGNALQG
Wiring Diagram
EC-579

HEC893
ELECTRICAL LOAD SIGNALQG
Wiring Diagram (Cont'd)
EC-580