NISSAN LATIO 2009 Service Repair Manual

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REFRIGERANT PRESSURE SENSOR
Component Description INFOID:0000000004537540
The refrigerant pressure sensor (1) is installed at the condenser of
the air conditioner system. The sens or uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
• : Vehicle front

EC-1006< SERVICE INFOMATION >
[MR TYPE 1]
REFRIGERANT PRESSURE SENSOR
Wiring Diagram INFOID:0000000004537541
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. BBWA2662E

REFRIGERANT PRESSURE SENSOR
EC-1007
< SERVICE INFOMATION >
[MR TYPE 1] C
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Diagnosis Procedure
INFOID:00000000045375421.
CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check voltage between ECM terminal 41 and ground with CON- SULT-III or tester.
OK or NG OK >>
INSPECTION END
NG >> GO TO 2. 2.
CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine and turn ignition switch OFF.
3. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace ground connections. 3.
CHECK REFRIGERANT PRESSURE SE NSOR POWER SUPPLY CIRCUIT
TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
41 GR Refrigerant pressure sensor [Engine is running]
• Warm-up condition
• Both A/C switch and blower fan switch: ON
(Compressor operates) 1.0 - 4.0V
48 BR Sensor ground
(Refrigerant pressure sensor) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
74 W Sensor power supply
(Refrigerant pressure sensor) [Ignition switch: ON]
Approximately 5VVoltage: 1.0 - 4.0V
PBIA9574J
:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

EC-1008< SERVICE INFOMATION >
[MR TYPE 1]
REFRIGERANT PRESSURE SENSOR
1. Disconnect refrigerant pressure sensor (1) harness connector.
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 3 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 4. 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 48.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 7.
NG >> GO TO 6. 6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK REFRIGERANT PRESSURE SENSOR INPU T SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between refrigerant pressure sensor terminal 2 and ECM terminal 41. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG BBIA0713E
Voltage: Approximately 5V
SEF479Y
Continuity should exist.
Continuity should exist.

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OK >> GO TO 9.
NG >> GO TO 8. .
OK or NG OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and Installation INFOID:0000000004537543
REFRIGERANT PRESSURE SENSOR Refer to MTC-83, " Removal and Installation of Refrigerant Pressure Sensor " .

EC-1010< SERVICE INFOMATION >
[MR TYPE 1]
MIL AND DATA LINK CONNECTOR
MIL AND DATA LINK CONNECTOR
Wiring Diagram INFOID:0000000004537544 AABWA0334G B

MIL AND DATA LINK CONNECTOR
EC-1011
< SERVICE INFOMATION >
[MR TYPE 1] C
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Target idle speed
A/T No load* (in P or N position)
700 ± 50 rpm
CVT No load* (In P or N position)
M/T No load* (in Neutral position)
Air conditioner: ON A/T In P or N position
850 rpm or more
CVT In P or N position
M/T In Neutral position
Ignition timing A/T In P or N position
13 ± 5 ° BTDC
CVT In P or N position
M/T In Neutral position Calculated load value% (Using CONSULT-III or GST)
At idle 10 - 35
At 2,500 rpm 10 - 35Supply voltage
Battery voltage (11 - 14V)
Output voltage at idle 1.0 - 1.3*V
Mass air flow (Using CONSULT-III or GST) 1.0 - 4.0 g·m/sec at idle*
2.0 - 10.0 g·m/sec at 2,500 rpm* Temperature
°C ( °F) Resistance k Ω
25 (77) 1.800 - 2.200Temperature
°C ( °F) Resistance k Ω
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260

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Air Fuel Ratio (A/F) Sensor 1 Heater
INFOID:0000000004537551
Heated Oxygen sensor 2 Heater INFOID:0000000004537552
Crankshaft Position Sensor (POS) INFOID:0000000004537553
Refer to EC-780, " Component Inspection " .
Camshaft Position Sensor (PHASE) INFOID:0000000004537554
Refer to EC-785, " Component Inspection " .
Throttle Control Motor INFOID:0000000004537555
Fuel Injector INFOID:0000000004537556
Fuel Pump INFOID:0000000004537557
Resistance [at 25
°C (77 °F)] 1.8 - 2.44 Ω