NISSAN LATIO 2010 Service Repair Manual

EC-366
< COMPONENT DIAGNOSIS >[HR16DE]
P1225 TP SENSOR
P1225 TP SENSOR
DescriptionINFOID:0000000005398529
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the
throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC LogicINFOID:0000000005398530
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 following procedure, confirm that battery voltage is more than 10 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-366, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398531
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P1225 Closed throttle position
learning performance Closed throttle position learning value is excessively
low. • Electric throttle control actuator
(TP sensor 1 and 2)
Revision: January 20102010 Versa

P1225 TP SENSOREC-367
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3. Check if foreign matter is c
aught between the throttle valve (1)
and the housing.
- Electric throttle control actuator (2)
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform EC-367, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000005398532
1.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Refer to EC-25, "
THROTTLE VALVE CLOSED POSITION L EARNING : Special Repair Requirement"
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-26, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
JMBIA0447ZZ
Revision: January 20102010 Versa

EC-368
< COMPONENT DIAGNOSIS >[HR16DE]
P1226 TP SENSOR
P1226 TP SENSOR
DescriptionINFOID:0000000005398533
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the
throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC LogicINFOID:0000000005398534
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 following procedure, confirm that battery voltage is more than 10 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF, wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 2 and 3 for 32 times.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-368, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398535
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226 Closed throttle position
learning performance Closed throttle position learning is not performed
successfully, repeatedly. • Electric throttle control actuator
(TP sensor 1 and 2)
Revision: January 20102010 Versa

P1226 TP SENSOREC-369
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3. Check if foreign matter is c
aught between the throttle valve (1)
and the housing.
- Electric throttle control actuator (2)
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform EC-369, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000005398536
1.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Refer to EC-25, "
THROTTLE VALVE CLOSED POSITION L EARNING : Special Repair Requirement"
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-26, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
JMBIA0447ZZ
Revision: January 20102010 Versa

EC-370
< COMPONENT DIAGNOSIS >[HR16DE]
P1421 COLD START CONTROL
P1421 COLD START CONTROL
DescriptionINFOID:0000000005398537
ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
DTC LogicINFOID:0000000005398538
DTC DETECTION LOGIC
NOTE:
If DTC P1421 is displayed with ot
her DTC, first perform the trouble diagnosis for other DTC.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Check that the “COOLAN TEMP/S” indication is between 5 °C (41 °F) and 36 °C (97° F) (A/T) or 15 °C
(59 °F) and 36 °C (97° F) (M/T).
If “COOLAN TEMP/S” indication is within the specified value, go to the following step.
If “COOLAN TEMP/S” indication is out of the specified value, cool engine down or warm engine up and go
to step 1.
5. Start engine and let it idle for 5 minutes.
6. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> Go to EC-370, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398539
1.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-26, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 2.
NO >> Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
• Crushed intake air passage
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P1421 Cold start emission reduction
strategy monitoring ECM does not control ignition timing and engine
idle speed properly when engine is started with
pre-warming up condition. • Lack of intake air volume
• Fuel injection system
•ECM
Revision: January 20102010 Versa

P1421 COLD START CONTROLEC-371
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• Intake air passage clogging
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform DTC CONFIRMATION PROC EDURE for DTC P0171. Refer to EC-223, "
DTC Logic".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-225, "
Diagnosis Procedure" for DTC P0171.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase 1st trip DTC. Refer to “How to Erase DTC and 1st Trip DTC” in EC-84, "
Diagnosis Description".
3. Perform DTC CONFIRMATION PROCEDURE. Refer to EC-370, "
DTC Logic".
Is the 1st trip DTC P1421 displayed again?
YES >> GO TO 5.
NO >> INSPECTION END
5.REPLACE ECM
1. Replace ECM.
2. Perform EC-23, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> INSPECTION END
Revision: January 20102010 Versa

EC-372
< COMPONENT DIAGNOSIS >[HR16DE]
P1715 INPUT SPEED SENSOR
(PRIMARY SPEED SENSOR)
P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)
DescriptionINFOID:0000000005398540
ECM receives input speed sensor signal from TCM via the CAN communication line. ECM uses this signal for
engine control.
DTC LogicINFOID:0000000005398541
DTC DETECTION LOGIC
NOTE:
• If DTC P1715 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC U1000,XXXX.
• If DTC P1715 is displayed with DTC P0335, first perform the trouble diagno sis for DTC P0335. Refer
to EC-257, "
DTC Logic".
• If DTC P1715 is displayed with DTC P0340, first perform the trouble diagno sis for DTC P0340. Refer
to EC-262, "
DTC Logic".
• If DTC P1715 is displayed with DTC P0605, first perform the trouble diagno sis for DTC P0605. Refer
to EC-349, "
DTC Logic".
• If DTC P1715 is displayed with DTC P0607, first perform the trouble diagno sis for DTC P0607. Refer
to EC-351, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and drive the vehicle at more t han 50 km/h (31 MPH) for at least 5 seconds.
CAUTION:
Always drive vehicle at a safe speed.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-372, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398542
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT-39, "
OBD-II Diagnostic Trouble Code (DTC)".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated.
2.REPLACE TCM
Replace TCM.
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1715 Input speed sensor
(TCM output) Input speed sensor signal is different from
the theoretical value calculated by ECM
from secondary speed sensor signal and
engine rpm signal. • Harness or connectors
(The CAN communication line is open or short-
ed)
• Harness or connectors
(Input speed sensor circuit is open or shorted)
•TCM
Revision: January 20102010 Versa

P1805 BRAKE SWITCHEC-373
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P1805 BRAKE SWITCH
DescriptionINFOID:0000000005398543
Brake switch signal is applied to the ECM through t
he stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
DTC LogicINFOID:0000000005398544
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-374, "Diagnosis Procedure".
NO >> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805 Brake switch A brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving. • Harness or connectors
(Stop lamp switch circuit is open or shorted.)
• Stop lamp switch
Revision: January 20102010 Versa

EC-374
< COMPONENT DIAGNOSIS >[HR16DE]
P1805 BRAKE SWITCH
Wiring Diagram
INFOID:0000000005398545
Diagnosis ProcedureINFOID:0000000005398546
1.CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
AABWA0316GB
Revision: January 20102010 Versa

P1805 BRAKE SWITCHEC-375
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Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK STOP LAMP SWIT
CH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E7, M69
• 10 A fuse (No. 7)
• Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and stop lamp switch harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK STOP LAMP SWITCH
Refer to EC-376, "
Component Inspection (Stop Lamp Switch)".
Is the inspection result normal?
YES >> GO TO 6.
Brake pedal Stop lamp
Fully released Not illuminated
Slightly depressed Illuminated
Stop lamp switch Ground Voltage
Connector Terminal
E13 1 Ground Battery voltage
PBIB2284E
ECM Stop lamp switch
Continuity
Connector Terminal Connector Terminal
E1699E13 2Existed
Revision: January 20102010 Versa