2008 NISSAN LATIO engine

DTC P1217 ENGINE OVER TEMPERATURE
EC-421
< SERVICE INFORMATION >
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OK >> GO TO 6.
NG >> Replace cooling fan motor.
6.CHECK INTERMITTENT INCIDENT
Perform EC-136
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connector.
PROCEDURE FOR MODELS WITHOUT A/C
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 4.
2.CHECK COOLING FAN LOW SPEED OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and touch “LOW” on the CONSULT-II screen.
3. Make sure that cooling fan operate at low speed.
OK or NG
OK >> GO TO3.
NG >> Check cooling fan control circuit. (Go to "PROCEDURE
B".)
3.CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-II
1. Touch “HIGH” on the CONSULT-II screen.
2. Make sure that cooling fan operates at higher speed than low
speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan control circuit. (Go to "PROCEDURE
A".)
4.CHECK COOLING FAN LOW SPEED OPERATION
Without CONSULT-II
1. Perform IPDM E/R auto active test and check cooling fan motor operation.
Refer to PG-19, "
Auto Active Test".
2. Make sure that cooling fan operate at low speed.
OK or NG
OK >> GO TO 5.
NG >> Check cooling fan speed control circuit. (Go to "PROCEDURE B".)
5.CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1. Turn ignition switch OFF.
SEF784Z
SEF785Z

EC-422
< SERVICE INFORMATION >
DTC P1217 ENGINE OVER TEMPERATURE
2. Disconnect engine coolant temperature sensor harness connector.
3. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
4. Restart engine and make sure that cooling fan operates at
higher speed than low speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan high speed control circuit. (Go to
"PROCEDURE A")
6.CHECK COOLING SYSTEM FOR LEAK
Refer to CO-8
.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following for leak.
•Hose
• Radiator
• Water pump (Refer to CO-16
.)
>> Repair or replace.
8.CHECK RADIATOR CAP
Refer to CO-11
.
OK or NG
OK >> GO TO 9.
NG >> Replace radiator cap.
9.CHECK THERMOSTAT
Refer to CO-17
.
OK or NG
OK >> GO TO 10.
NG >> Replace thermostat.
10.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-191, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace engine coolant temperature sensor.
11 .CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to EC-424, "
Main 13 Causes of Overheating".
>>INSPECTION END
PROCEDURE B
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E44.
SEF023R

DTC P1217 ENGINE OVER TEMPERATURE
EC-423
< SERVICE INFORMATION >
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3. Check voltage between IPDM E/R terminal 22 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
• 50A fusible link
• Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK COOLING FAN MOTOR CIRCUIT
1. Disconnect cooling fan motor harness connector (1).
- : Vehicle front
-Resistor (2)
2. Disconnect IPDM E/R harness connectors E46 and E48.
3. Check harness continuity between the following;
cooling fan motor terminal 1 and IPDM E/R terminal 20,
cooling fan motor terminal 4 and ground.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between the following;
cooling fan motor terminal 2 and IPDM E/R terminal 24,
cooling fan motor terminal 3 and IPDM E/R terminal 23.
Refer to Wiring Diagram.
6. Also check harness for short to ground and short to power.
7. Check harness continuity between IPDM E/R terminals 39, 59 and ground.
Refer to Wiring Diagram.
8. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between cooling fan motor and IPDM E/R
• Harness for open or short between cooling fan motor and ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK COOLING FAN MOTOR
Refer to EC-424, "
Component Inspection".
OK or NG
Voltage: Battery voltage
PBIB2607E
Continuity should exist.
Continuity should exist.
Continuity should exist.
BBIA0706E

EC-424
< SERVICE INFORMATION >
DTC P1217 ENGINE OVER TEMPERATURE
OK >> GO TO 6.
NG >> Replace cooling fan motor.
6.CHECK INTERMITTENT INCIDENT
Perform EC-136
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connector.
Main 13 Causes of OverheatingINFOID:0000000001702935
*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 information, refer to CO-5
.
Component InspectionINFOID:0000000001702936
COOLING FAN MOTOR
Model with A/C
Engine Step Inspection item Equipment Standard Reference page
OFF 1 • Blocked radiator
• Blocked condenser
• Blocked radiator grille
• Blocked bumper• Visual No blocking —
2 • Coolant mixture • Coolant tester 50 - 50% coolant mixture See MA-11, "
Anti-freeze
Coolant Mixture Ratio".
3 • Coolant level • Visual Coolant up to MAX level in
reservoir tank and radiator
filler neckSee CO-8, "
Inspection".
4 • Radiator cap • Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm
2, 9 - 14
psi) (Limit)See CO-13, "
Checking
Radiator Cap".
ON*
25 • Coolant leaks • Visual No leaks See CO-8, "Inspection".
ON*
26 • Thermostat • Touch the upper and
lower radiator hosesBoth hoses should be hot See CO-17, and CO-11
ON*17 • Cooling fan • CONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-417, "
Di-
agnosis Procedure").
OFF 8 • Combustion gas leak • Color checker chemical
tester 4 Gas analyzerNegative —
ON*
39 • Coolant temperature
gauge• Visual Gauge less than 3/4 when
driving—
• Coolant overflow to res-
ervoir tank• Visual No overflow during driving
and idlingSee CO-8, "
Changing En-
gine Coolant".
OFF*
410 • Coolant return from res-
ervoir tank to radiator• Visual Should be initial level in
reservoir tankSee CO-8, "Inspection".
OFF 11 • Water control valve• Remove and inspect
the valveWithin the specified valueSee CO-19, "
Removal
and Installation"
OFF 12 • Cylinder head • Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)See EM-62.
13 • Cylinder block and pis-
tons• Visual No scuffing on cylinder
walls or pistonSee EM-76
.

DTC P1217 ENGINE OVER TEMPERATURE
EC-425
< SERVICE INFORMATION >
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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.
Te r m i n a l s
(+) (-)
Cooling fan motor 1 2
SEF888V
Sp ee dterminals
(+) (−)
Cooling fan motorLow 14
23
High 1 and 2 3 and 4
SEF734W

EC-430
< SERVICE INFORMATION >
DTC P1421 COLD START CONTROL
DTC P1421 COLD START CONTROL
DescriptionINFOID:0000000001702947
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
On Board Diagnosis LogicINFOID:0000000001702948
DTC Confirmation ProcedureINFOID:0000000001702949
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.
•If DTC P1421 is displayed with other DTC, first 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-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Check that the “COOLAN TEMP/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 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. If 1st trip DTC is detected, go to EC-430, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702950
1.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-76, "
Idle Air Volume Learning".
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 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
• Intake air passage clogging
OK or NG
OK >> GO TO 3.
NG >> Repair or replace malfunctioning part
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1421
1421Cold start emission reduction
strategy monitoringECM 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
SEF174Y

DTC P1564 ASCD STEERING SWITCH
EC-435
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001702956
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body.
Refer to EC-142, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “RESUME/ACC SW”, “SET SW and “CAN-
CEL SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check each item indication under the following conditions.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
94 R ASCD steering switch[Ignition switch: ON]
• ASCD steering switch: OFFApproximately 4V
[Ignition switch: ON]
• MAIN switch: PressedApproximately 0V
[Ignition switch: ON]
• CANCEL switch: PressedApproximately 1V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: PressedApproximately 3V
[Ignition switch: ON]
• SET/COAST switch: PressedApproximately 2V
95 B Sensor ground[Engine is running]
•Warm-up condition
• Idle speedApproximately 0V
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Switch Monitor item Condition Indication
MAIN switch MAIN SWPressed ON
Released OFF
CANCEL switch CANCEL SWPressed ON
Released OFF
SEC006D

DTC P1572 ASCD BRAKE SWITCH
EC-439
< SERVICE INFORMATION >
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DTC Confirmation ProcedureINFOID:0000000001702961
CAUTION:
Always drive vehicle at a safe speed.
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.
• Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for
malfunction B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
TESTING CONDITION:
Steps 4 and 5 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Press MAIN switch and make sure that CRUISE indicator lights
up.
4. Drive the vehicle for at least 5 consecutive seconds under the
following condition.
If 1st trip DTC is detected, go to EC-441, "
Diagnosis Procedure".
If 1st trip DTC is not detected, go to the following step.
5. Drive the vehicle for at least 5 consecutive seconds under the
following condition.
6. If 1st trip DTC is detected, go to EC-441, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
VHCL SPEED SE More than 30 km/h (19 MPH)
Shift lever Suitable position
VHCL SPEED SE More than 30 km/h (19 MPH)
Shift lever Suitable position
Driving locationDepress the brake pedal for more than 5
seconds so as not to come off from the
above-mentioned vehicle speed.
PBIB2386E