NISSAN LATIO 2010 Service Repair Manual

EC-1026
< SERVICE INFORMATION >[MR18DE]
IGNITION SIGNAL
2. Check harness continuity between ignition coil terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 13.
NG >> Repair open circuit or short to power in harness or connectors.
13.CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 17, 18, 21, 22 and ignition coil terminal 1. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to EC-1026, "
Component Inspection".
OK or NG
OK >> GO TO 15.
NG >> Replace ignition coil with power transistor.
15.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000005532919
IGNITION COIL WITH POWER TRANSISTOR
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.
4. If NG, replace ignition coil with power transistor.
If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected. Continuity should exist.
Continuity should exist.
Terminal No. (Polarity)
Resistance [at 25°C (77 °F)]
1 and 2 Except 0 or ∞ Ω
1 and 3 Except 0 Ω
2 and 3
PBIB0847E
Revision: January 20102010 Versa

IGNITION SIGNALEC-1027
< SERVICE INFORMATION > [MR18DE]
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7. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pres-
sure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
- : Vehicle front
8. Start engine.
9. After engine stalls, crank it two or three times to release all fuel pressure.
10. Turn ignition switch OFF.
11. Remove all ignition coil harness connectors to avoid the electri- cal discharge from the ignition coils.
12. Remove ignition coil and spark plug of the cylinder to be checked.
13. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
14. Connect spark plug and harness connector to ignition coil.
15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
16. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal por-
tion.
CAUTION:
• Do not approach to the spark plug and the ignition coilwithin 50 cm. Be careful not to get an electrical shock
while checking, because the el ectrical discharge voltage
becomes 20 kV or more.
• It might cause to damage the igni tion coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the sp ark might be generated even if the coil is mal-
functioning.
17. If NG, replace ignition coil with power transistor.
CONDENSER-2
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Check resistance between condenser-2 terminals 1 and 2.
4. If NG, replace condenser-2.
Removal and InstallationINFOID:0000000005532920
IGNITION COIL WITH POWER TRANSISTOR
Refer to EM-149.
Spark should be generated.
PBIB2958E
PBIB2325E
Resistance: Above 1 M
Ω [at 25 °C (77° F)]
PBIB0794E
Revision: January 20102010 Versa

EC-1028
< SERVICE INFORMATION >[MR18DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
Component DescriptionINFOID:0000000005532921
The refrigerant pressure sensor (1) is installed at the condenser of
the air conditioner system. The sensor 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
BBIA0713E
PBIB2657E
Revision: January 20102010 Versa

REFRIGERANT PRESSURE SENSOREC-1029
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Wiring DiagramINFOID:0000000005532922
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh
en measuring input/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
Revision: January 20102010 Versa

EC-1030
< SERVICE INFORMATION >[MR18DE]
REFRIGERANT PRESSURE SENSOR
Diagnosis Procedure
INFOID:0000000005532923
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 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-638, "
Ground Inspection".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
TERMI- NAL NO. WIRE
COLOR ITEM
CONDITIONDATA (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 - 4.0 V
48 BR Sensor ground
(Refrigerant pressure sensor) [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
74 W Sensor power supply
(Refrigerant pressure sensor) [Ignition switch: ON]
Approximately 5 V
Voltage: 1.0 - 4.0 V
PBIA9574J
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Revision: January 20102010 Versa

REFRIGERANT PRESSURE SENSOREC-1031
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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 IN PUT 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 5 V
SEF479Y
Continuity should exist.
Continuity should exist.
Revision: January 20102010 Versa

EC-1032
< SERVICE INFORMATION >[MR18DE]
REFRIGERANT PRESSURE SENSOR
OK >> GO TO 9.
NG >> GO TO 8.
8.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.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationINFOID:0000000005532924
REFRIGERANT PRESSURE SENSOR
Refer to MTC-89, "Removal and Installation of Refrigerant Pressure Sensor".
Revision: January 20102010 Versa

MIL AND DATA LINK CONNECTOREC-1033
< SERVICE INFORMATION > [MR18DE]
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MIL AND DATA LINK CONNECTOR
Wiring DiagramINFOID:0000000005532925
ABBWA0363GB
Revision: January 20102010 Versa

EC-1034
< SERVICE INFORMATION >[MR18DE]
MIL AND DATA LINK CONNECTOR
BBWA2998E
Revision: January 20102010 Versa

SERVICE DATA AND SPECIFICATIONS (SDS)EC-1035
< SERVICE INFORMATION > [MR18DE]
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SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel PressureINFOID:0000000005532926
Idle Speed and Ignition TimingINFOID:0000000005532927
*: Under the following conditions:
• Air conditioner switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Calculated Load ValueINFOID:0000000005532928
Mass Air Flow SensorINFOID:0000000005532929
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorINFOID:0000000005532930
Engine Coolant Temperature SensorINFOID:0000000005532931
Fuel pressure at idle
Approximately 350 kPa (3.57 kg/cm2, 51 psi)
Target idle speedA/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 - 35 %
Supply voltageBattery voltage (11 - 14 V )
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 - 2.200
Temperature [°C ( °F)] Resistance (k Ω)
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Revision: January 20102010 Versa