NISSAN LATIO 2010 Service Repair Manual

EC-796
< SERVICE INFORMATION >[MR18DE]
DTC P0335 CKP SENSOR (POS)
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK CRANKSHAFT POSITION (CKP) SENS
OR (POS) POWER SUPPLY CIRCUIT-I
1. Disconnect crankshaft position (CKP) sensor (POS) (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between CKP sensor (POS) terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
3.CHECK CKP SENSOR (POS) POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CKP sens or (POS) terminal 1 and ECM terminal 75.
Refer to Wiring Diagram.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit.
4.CHECK COMPONENTS POWER SUPPLY
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors.
: Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
PBIB3326E
Voltage: Approximately 5 V
PBIB3312E
Continuity should exist.
ECM terminal Sensor terminalReference Wiring Diagram
74 Refrigerant pressure sensor terminal 3 EC-1029, "
Wiring Diagram"
75Crankshaft position sensor (POS) terminal 1 EC-794, "Wiring Diagram"
76EVAP control system pressure sensor terminal 3 EC-853, "Wiring Diagram"
102APP sensor terminal 5 EC-972, "Wiring Diagram"
Revision: January 20102010 Versa

DTC P0335 CKP SENSOR (POS)EC-797
< SERVICE INFORMATION > [MR18DE]
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5.CHECK COMPONENTS
Check the following.
• Refrigerant pressure sensor. (Refer to EC-1030
.)
• EVAP control system pressure sensor. (Refer to EC-850
.)
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning components.
6.CHECK APP SENSOR
Refer to EC-969, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-580, "
Accelerator Pedal Released Position Learning".
3. Perform EC-580, "
Throttle Valve Closed Position Learning".
4. Perform EC-580, "
Idle Air Volume Learning".
>> INSPECTION END
8.CHECK CKP SENSOR (POS) GRO UND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CKP sens or (POS) terminal 2 and ECM terminal 62.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK CKP SENSOR (POS) INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between CKP s ensor (POS) terminal 3 and ECM terminal 61.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK CRANKSHAFT POSI TION SENSOR (POS)
Refer to EC-798, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace crankshaft position sensor (POS).
11 .CHECK GEAR TOOTH
Visually check for chipping signal plate gear tooth.
OK or NG
OK >> GO TO 12.
NG >> Replace the signal plate. Continuity should exist.
Continuity should exist.
Revision: January 20102010 Versa

EC-798
< SERVICE INFORMATION >[MR18DE]
DTC P0335 CKP SENSOR (POS)
12.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000005532643
CRANKSHAFT POSITION SENSOR (POS)
1. Loosen the fixing bolt of the sensor.
2. Disconnect crankshaft position sensor (POS) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
6. If NG, replace crankshaft position sensor (POS).
Removal and InstallationINFOID:0000000005532644
CRANKSHAFT POSITION SENSOR (POS)
Refer to EM-195, "Component".
PBIA9210J
Terminal No. (Polarity) Resistance [at 25°C (77 °F)]
1 (+) - 2 (-) Except 0 or ∞ Ω
1 (+) - 3 (-)
2 (+) - 3 (-)
PBIA9584J
Revision: January 20102010 Versa

DTC P0340 CMP SENSOR (PHASE)EC-799
< SERVICE INFORMATION > [MR18DE]
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DTC P0340 CMP SENSOR (PHASE)
Component DescriptionINFOID:0000000005532645
The camshaft position sensor (PHASE) senses the protrusion of
camshaft (INT) to identify a particular cylinder. The camshaft position
sensor (PHASE) senses the pist
on position. When the crankshaft
position sensor (POS) system becomes inoperative, the camshaft
position sensor (PHASE) provides various controls of engine parts
instead, utilizing timing of cylinder identification signals. The sensor
consists of a permanent magnet and Hall IC. When engine is run-
ning, the high and low parts of the teeth cause the gap with the sen-
sor to change. The changing gap causes the magnetic field near the
sensor to change. Due to the changing magnetic field, the voltage
from the sensor changes.
ECM receives the signals as shown in the figure.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005532646
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005532647
NOTE:
If DTC P0340 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-896
.
DTC Confirmation ProcedureINFOID:0000000005532648
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the follo wing procedure, confirm that battery vo ltage is more than 10.5 V with igni-
tion switch ON.
1. Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.
PBIA9875J
PBIB2997E
Monitor item Condition Specification
ENG SPEED • Run engine and compare CONSULT-III value with the tachometer indica-
tion. Almost the same speed as the ta-
chometer indication.
DTC No. Trouble diagnosis name
DTC detecting condition Possible cause
P0340
0340 Camshaft position sensor
(PHASE) circuit • The cylinder No. signal is not sent to ECM for
the first few seconds during engine cranking.
• The cylinder No. signal is not set to ECM dur- ing engine running.
• The cylinder No. signal is not in the normal
pattern during engine running. • Harness or connectors
[Camshaft position sensor (PHASE) cir-
cuit is open or shorted.]
• Camshaft position sensor (PHASE)
• Camshaft (INT)
•Starter motor
• Starting system circuit
• Dead (Weak) battery
Revision: January 20102010 Versa

EC-800
< SERVICE INFORMATION >[MR18DE]
DTC P0340 CMP SENSOR (PHASE)
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
EC-801, "
Diagnosis Procedure".
If 1st trip DTC is not detected, go to next step.
4. Maintain engine speed at more t han 800 rpm for at least 5 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-801, "
Diagnosis Procedure".
Wiring DiagramINFOID:0000000005532649
BBWA2639E
Revision: January 20102010 Versa

DTC P0340 CMP SENSOR (PHASE)EC-801
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000005532650
1.CHECK STARTING SYSTEM
Turn ignition switch to START position.
Ye s o r N o
Yes >> GO TO 2.
No >> Check starting system. (Refer to SC-16, "
Trouble Diagnosis with Multitasking Battery Diagnostic
Station".)
2.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-638, "
Ground Inspection".
TERMI-
NAL NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
63 BR Sensor ground
[Camshaft position sensor
(PHASE)] [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
65 G Camshaft position sensor
(PHASE) [Engine is running]
•
Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle 1.0 - 2.0 V
[Engine is running]
• Engine speed: 2,000 rpm 1.0 - 2.0 V
78 O Sensor power supply
[Camshaft position sensor
(PHASE)] [Ignition switch: ON]
Approximately 5 V
PBIB2986E
PBIB2987E
Does the engine turn over?
Does the starter motor operate?
Revision: January 20102010 Versa

EC-802
< SERVICE INFORMATION >[MR18DE]
DTC P0340 CMP SENSOR (PHASE)
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3.CHECK CAMSHAFT POSITION (CMP) SENS
OR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) (1) har- ness connector.
- : Vehicle front
2. Turn ignition switch ON.
3. Check voltage between CMP sensor (PHASE) terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK CMP SENSOR (PHASE) GRO UND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between CMP sensor (PHASE) terminal 2 and ECM terminal 63.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK CMP SENSOR (PHASE) INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
:Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
PBIB3327E
Voltage: Approximately 5 V
PBIB3312E
Continuity should exist.
Revision: January 20102010 Versa

DTC P0340 CMP SENSOR (PHASE)EC-803
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1. Check harness continuity between CMP sens
or (PHASE) terminal 3 and ECM terminal 65.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK CAMSHAFT POSITI ON SENSOR (PHASE)
Refer to EC-803, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> Replace camshaft position sensor (PHASE).
7.CHECK CAMSHAFT (INTAKE)
Check the following.
• Accumulation of debris to the signal plate of camshaft (1) rear end
• Chipping signal plate of camshaft rear end
OK or NG
OK >> GO TO 8.
NG >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000005532651
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sensor.
2. Disconnect camshaft position s ensor (PHASE) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping. Continuity should exist.
PBIA9557J
PBIA9876J
Revision: January 20102010 Versa

EC-804
< SERVICE INFORMATION >[MR18DE]
DTC P0340 CMP SENSOR (PHASE)
5. Check resistance as shown in the figure.
6. If NG, replace camshaft position sensor (PHASE).
Removal and InstallationINFOID:0000000005532652
CAMSHAFT POSITION SENSOR (PHASE)
Refer to
EM-166, "Component".
Terminal No. (Polarity) Resistance [at 25°C (77 °F)]
1 (+) - 2 (-) Except 0 or ∞ Ω
1 (+) - 3 (-)
2 (+) - 3 (-)
PBIA9584J
Revision: January 20102010 Versa

DTC P0420 THREE WAY CATALYST FUNCTIONEC-805
< SERVICE INFORMATION > [MR18DE]
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DTC P0420 THREE WAY CATALYST FUNCTION
On Board Diagnosis LogicINFOID:0000000005532653
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated
oxygen sensor 2 approaches a specified limit value, the three way
catalyst (manifold) malfunction is diagnosed.
DTC Confirmation ProcedureINFOID:0000000005532654
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-III
TESTING CONDITION:
Do not hold engine speed for more
than the specified minutes below.
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70 °C (158° F).
If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches to 70°C (158° F).
7. Open engine hood.
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUPPORT” mode with CONSULT-III.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator pedal completely.
If “INCMP” of “CATALYST” changed to “CMPLT”, go to step 12.
10. Wait 5 seconds at idle.
11. Rev engine up to 2,000 to 3,000 rpm and maintain it unt il “INCMP” of “CATALYST” changes to “CMPLT” (It
will take approximately 5 minutes).
If not “CMPLT”, stop engine and cool it down to less than 70 °C (158° F) and then retest from step 1.
12. Check 1st trip DTC. If 1st trip DTC is detected, go to EC-806, "
Diagnosis Procedure".
Overall Function CheckINFOID:0000000005532655
Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st
trip DTC might not be confirmed.
SEF484YB
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0420
0420 Catalyst system efficiency
below threshold • Three way catalyst (manifold) does not operate
properly.
• Three way catalyst (manifold) does not have enough oxygen storage capacity. • Three way catalyst (manifold)
• Exhaust tube
• Intake air leaks
• Fuel injector
• Fuel injector leaks
• Spark plug
• Improper ignition timing
Revision: January 20102010 Versa