NISSAN LATIO 2009 Service Repair Manual

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Cooling fan motor terminal 2 and IPDM E/R terminal 24.
Cooling fan motor terminal 3 and IPDM E/R terminal 23.
Cooling fan motor terminal 4 and ground.
Refer to wiring diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 15.
NG >> GO TO 14. Component Inspection " .
OK or NG OK >> GO TO 16.
NG >> Replace cooling fan motor. .
OK or NG OK >> Replace IPDM E/R. Refer to
PG-27, " Removal and Installation of IPDM E/R " .
NG >> Repair or replace harness or connector.
Main 13 Causes of Overheating INFOID:0000000004500285
Continuity should exist.
Engine Step Inspection item Equipment Standard Reference OFF 1 • Blocked radiator • Blocked condenser
• Blocked radiator grille
• Blocked bumper • Visual No blocking —
2 • Coolant mixture • Coolant tester See MA-15, " Anti-freeze Coolant Mixture Ratio " .
3 • Coolant level • Visual Coolant up to MAX level in reservoir tank and radiator
filler neck See
CO-35, " Inspection " .
4 • Radiator cap • Pressure tester See CO-40, " Checking Radiator Cap " .
ON* 2
5 • Coolant leaks • Visual No leaks See CO-35, " Inspection " .
ON* 2
6 • Thermostat • Touch the upper and
lower radiator hosesBoth hoses should be hot See
CO-45 , and
CO-47 ON*
1
7 • Cooling fan • CONSULT-III Operating See trouble diagnosis for
DTC P1217 (EC-1412, " Diagnosis Procedure " ).
OFF 8 • Combustion gas leak • Color checker chemical tester 4 Gas analyzerNegative —
ON* 3
9 • Coolant temperature
gauge • Visual Gauge less than 3/4 when
driving —
• Coolant overflow to res- ervoir tank • Visual No overflow during driving
and idling See
CO-35, " Changing
Engine Coolant " .

EC-1416< SERVICE INFOMATION >
[MR TYPE 2]
DTC P1217 ENGINE
OVER TEMPERATURE
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more informat ion, refer to CO-32 .
Component Inspection INFOID:0000000004500286
COOLING FAN MOTOR
Model with A/C
1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
Models without A/C
1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor. OFF*
4
10 • Coolant return from res-
ervoir tank to radiator • Visual Should be initial level in
reservoir tank See
CO-35, " Inspection " .
OFF 11 • Water control valve • Remove and inspect
the valve Within the specified value See
CO-47, " Removal
and Installation "
OFF 12 • Cylinder head • Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping) See
EM-185 .
13 • Cylinder block and pis- tons • Visual No scuffing on cylinder
walls or piston See
EM-199 .
Engine Step Inspection item Equipment Standard Reference Terminals
(+) (-)
Cooling fan motor 1 2 SEF888V
Speed
terminals
(+) ( −)
Cooling fan motor Low 1 4
2 3
High 1 and 2 3 and 4 SEF734W

DTC P1225 TP SENSOR
EC-1417
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P1225 TP SENSOR
Component Description INFOID:0000000004500287
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 potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
On Board Diagnosis Logic INFOID:0000000004500288
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure INFOID:0000000004500289
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, 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 10V at idle.
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.
5. If 1st trip DTC is detected, go to EC-1417, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045002901.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is c aught between the throttle valve (1)
and the housing.
- : Vehicle front
OK or NG OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle
control actuator inside. 2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-1084, " Throttle Valve Closed Position Learning " .
3. Perform EC-1084, " Idle Air Volume Learning " . PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1225
1225 Closed throttle position
learning performance Closed throttle position learning value is exces-
sively low. • Electric throttle control actuator
(TP sensor 1 and 2) BBIA0711E

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DTC P1226 TP SENSOR
EC-1419
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P1226 TP SENSOR
Component Description INFOID:0000000004501208
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 potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
On Board Diagnosis Logic INFOID:0000000004500293
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure INFOID:0000000004500294
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, 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 10V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 3 and 4 for 32 times.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-1419, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045012091.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is c aught between the throttle valve (1)
and the housing.
- : Vehicle front
OK or NG OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside. 2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-1084, " Throttle Valve Closed Position Learning " . PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226
1226 Closed throttle position
learning performance Closed throttle position learning is not per-
formed successfully, repeatedly. • Electric throttle control actuator
(TP sensor 1 and 2) BBIA0711E

Idle Air Volume Learning " .
>> INSPECTION END
Removal and Installation INFOID:0000000004501210
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-141 .

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DTC P1421 COLD START CONTROL
Description INFOID:0000000004500297
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way ca talyst by heating the catalyst and reduces emissions.
On Board Diagnosis Logic INFOID:0000000004500298
DTC Confirmation Procedure INFOID:0000000004500299
NOTE:
• If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
• If DTC P1421 is displayed with other DTC, firs t perform the trouble diagnosis for other DTC.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
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 TE MP/S” indication is between 4°C (39 °F) and 36 °C (97 °F).
If “COOLAN TEMP/S” indication is within the specified value, go to the following step.
If “COOLAN TEMP/S” indication is out of the s pecified 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.
7. If 1st trip DTC is detected, go to EC-1421, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004500300Idle Air Volume Learning " .
Is Idle Air Volume Learning carried out successfully?
Yes or No Yes >> GO TO 2.
No >> Follow the instruction of Idle Air Volume Learning. OK >> GO TO 3.
NG >> Repair or replace malfunctioning part DTC Confirmation Procedure " for DTC P0171.
OK or NG OK >> GO TO 4.DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1421
1421 Cold start emission reduction
strategy monitoring ECM does not control ignition timing and engine
idle speed properly when engine is started with
prewarming up condition. • Lack of intake air volume
• Fuel injection system
• ECM

Diagnosis Procedure " for DTC P0171.
DTC Confirmation Procedure " .
3. Is the 1st trip DTC P1421 displayed again?
Yes or No Yes >> GO TO 5.
No >> INSPECTION END ECM Re-communicating Function " .
3. Perform EC-1084, " VIN Registration " .
4. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
5. Perform EC-1084, " Throttle Valve Closed Position Learning " .
6. Perform EC-1084, " Idle Air Volume Learning " .
>> INSPECTION END

DTC P1564 ASCD STEERING SWITCH
EC-1423
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P1564 ASCD STEERING SWITCH
Component Description INFOID:0000000004500301
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-1033 for the ASCD function.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004500302
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004500303
This self-diagnosis has the on e trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-1393 .
1. ASCD steering switch 2. MAIN switch 3. CANCEL switch
4. RESUME/ACCELERATE switch 5. SET/COAST switch BBIA0707E
MONITOR ITEM CONDITION SPECIFICATION
MAIN SW • Ignition switch: ON MAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW • Ignition switch: ON CANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW • Ignition switch: ON RESUME/ACCELERATE switch:
Pressed ON
RESUME/ACCELERATE switch: Re-
leased OFF
SET SW • Ignition switch: ON SET/COAST switch: Pressed ON
SET/COAST switch: Released OFF DTC No.
Trouble diagnosis
name DTC detecting condition Possible cause
P1564
1564 ASCD steering switch • An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
• ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
• ECM detects that the ASCD steering switch
is stuck ON. • Harness or connectors
(ASCD switch circuit is open or shorted.)
• ASCD steering switch
• ECM

Diagnosis Procedure " .