2009 NISSAN LATIO check engine

EC
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DTC P0500 VSS
Description INFOID:0000000004500250
NOTE:
• If DTC P0500 is displayed with DTC UXXXX, first perform the tr ouble diagnosis for DTC UXXXX.
• If DTC P0500 is displayed with DT C P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-1395 .
The vehicle speed signal is sent from “ABS actuator and electric unit (control unit)” or combination meter
through CAN communication line
On Board Diagnosis Logic INFOID:0000000004500251
FAIL-SAFE MODE When the malfunction is detect ed, ECM enters fail-safe mode.
DTC Confirmation Procedure INFOID:0000000004500252
CAUTION:
Always drive vehicle at a safe speed.
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:
Steps 1 and 2 may be conducted with the drive wheels li fted 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-III
1. Start engine.
2. Read “VHCL SPEED SE” in “DATA MONITOR” m ode with CONSULT-III. The vehicle speed on CON-
SULT-III should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to EC-1388, " Diagnosis Procedure " .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to EC-1388, " Diagnosis Procedure " .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0500
0500 Vehicle speed sensor The vehicle speed signal sent to ECM is
almost km/h (0 MPH) even when vehicle
is being driven. • Harness or connectors
(CAN communication line is open or shorted.)
• Harness or connectors (Vehicle speed signal circuit is open or shorted)
• ABS actuator and electric unit (control unit)
• Combination meter Detected item Engine operating condition in fail-safe mode
Vehicle speed sensor The cooling fan operates (High) while engine is running. ENG SPEED More than 1,600 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 5.5 - 31.8 msec
Shift lever Suitable position
PW/ST SIGNAL OFF

EC
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DTC P0506 ISC SYSTEM
Description INFOID:0000000004500255
NOTE:
If DTC P0506 is displayed with ot her DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified leve l through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine id ling speed. The ECM calculates the actual engine speed
from signals of crankshaft position sensor (POS) and camshaft position sensor (PHASE).
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is t he lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic INFOID:0000000004500256
DTC Confirmation Procedure INFOID:0000000004500257
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 the target idle speed is out of the specified value, perform EC-1084, " Idle Air Volume Learning " ,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-1534 .
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10 °C (14 °F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-1389, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004500258OK >> GO TO 2.
NG >> Discover air leak location and repair. ECM Re-communicating Function " .
4. Perform EC-1084, " VIN Registration " .
5. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
6. Perform EC-1084, " Throttle Valve Closed Position Learning " .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0506
0506 Idle speed control sys-
tem RPM lower than ex-
pected The idle speed is less than the target idle speed
by 100 rpm or more. • Electric throttle control actuator
• Intake air leak

EC
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DTC P0507 ISC SYSTEM
Description INFOID:0000000004500259
NOTE:
If DTC P0507 is displayed with ot her DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified leve l through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine id ling speed. The ECM calculates the actual engine speed
from signals of camshaft position sensor (POS) and camshaft position sensor (PHASE).
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is t he lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic INFOID:0000000004500260
DTC Confirmation Procedure INFOID:0000000004500261
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 the target idle speed is out of the specified value, perform EC-1084, " Idle Air Volume Learning " ,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-1534 .
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10 °C (14 °F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-1391, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004500262OK >> GO TO 2.
NG >> Repair or replace. OK >> GO TO 3.
NG >> Discover air leak location and repair.

DTC P0605 ECM
EC-1393
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
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K L
M A EC
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DTC P0605 ECM
Component Description INFOID:0000000004500263
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis Logic INFOID:0000000004500264
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE ECM enters fail-safe mode when malfunction A is detected.
DTC Confirmation Procedure INFOID:0000000004500265
Perform PROCEDURE FOR MALFUNCTION A first. If th e 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
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.
PROCEDURE FOR MALFUNCTION A 1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-1394, " Diagnosis Procedure " .
PROCEDURE FOR MALFUNCTION B 1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to EC-1394, " Diagnosis Procedure " .
PROCEDURE FOR MALFUNCTION C 1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Repeat step 2 for 32 times. PBIA9222J
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605
0605 Engine control module A) ECM calculation function is malfunctioning.
• ECM
B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning. Detected items Engine operation condition in fail-safe mode
Malfunction A • ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5
degrees) by the return spring.
• ECM deactivates ASCD operation.

EC-1398< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0643 SENSOR POWER SUPPLY
Diagnosis Procedure INFOID:00000000045002701.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-1144, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
72 V Sensor power supply
(Throttle position sensor) [Ignition switch: ON]
Approximately 5V
78 O Sensor power supply
[Camshaft position sensor
(PHASE)] [Ignition switch: ON]
Approximately 5V
102 SB Sensor power supply
(APP sensor 2) [Ignition switch: ON]
Approximately 5V
103 GR Accelerator pe
dal position
sensor 2 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.3 - 0.6V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 1.95 - 2.4V
104 Y Sensor ground
(APP sensor 2) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
106 P Sensor power supply
(APP sensor 1) [Ignition switch: ON]
Approximately 5V
110 G Accelerator pe
dal position
sensor 1 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.6 - 0.9V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 3.9 - 4.7V
111 R Sensor ground
(APP sensor 1) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

EC
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DTC P0850 PNP SWITCH
Component Description INFOID:0000000004500271
When the shift lever position is P or N (A/T, CVT), Neut ral (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004500272
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004500273
DTC Confirmation Procedure INFOID:0000000004500274
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode wit h CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
If NG, go to EC-1404, " Diagnosis Procedure " .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds. MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW • Ignition switch: ON Shift lever: P or N (A/T, CVT),
Neutral (M/T) ON
Shift lever: Except above OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850 Park/neutral position switch The signal of the park/neutral position (PNP)
switch is not changed in the process of en-
gine starting and driving. • Harness or connectors
[Park/neutral position (PNP) switch circuit
is open or shorted.]
• Park/neutral position (PNP) switch
• TCM (CVT models) Position (Shift lever) Known-good signal
N or P position (A/T, CVT)
Neutral position (M/T) ON
Except above OFF
ENG SPEED More than 1,200 rpm (CVT) More than 1,450 rpm (A/T)
More than 1,900 rpm (M/T)
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 2.4 - 31.8 msec (CVT) 1.4 - 31.8 msec (A/T)
1.7 - 31.8 msec (M/T)

EC
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Cooling Fan Relay Operation
The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004500280
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004500281
If the cooling fan or another component in the cooli ng system malfunctions, engine coolant temperature will
rise. When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction
is indicated.
This self-diagnosis has the on e trip detection logic.
CAUTION:
When a malfunction is in dicated, be sure to replace the coolant. Refer to CO-35, " Changing Engine
Coolant " . Also, replace the engine oil. Refer to
LU-17, " Changing Engine Oil " .
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA-15, " Anti-freeze Coolant Mixture Ratio " .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function Check INFOID:0000000004500282
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING: Cooling fan speed
Cooling fan relay
1 2 3
Stop (OFF) OFF OFF OFF
Low (LOW) ON OFF OFF
High (HI) ON ON ON MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG • Engine: After warming up, idle
the engine Air conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.) ON
COOLING FAN • Engine: After warming up, idle
the engine
• Air conditioner switch: OFF Engine coolant temperature: 97
°C
(207 °F) or less OFF
Engine coolant temperature: Between
98 °C (208 °F) and 99 °C (210 °F) LOW
Engine coolant temperature: 100 °C
(212 °F) or more HIGHDTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217 Engine over temperature
(Overheat) • Cooling fan does not operate properly (Over-
heat).
• Cooling fan system does not operate properly (Overheat).
• Engine coolant was not added to the system using the proper filling method.
• Engine coolant is not within the specified
range. • Harness or connectors
(Cooling fan circuit is open or shorted.)
• Cooling fan
• IPDM E/R (Cooling fan relays)
• Radiator hose
• Radiator
• Reservoir tank
• Radiator cap
• Water pump
• Thermostat
• Water control valve
For more information, refer to EC-1415, " Main 13 Causes of Overheating " .

EC-1410< SERVICE INFOMATION >
[MR TYPE 2]
DTC P1217 ENGINE
OVER TEMPERATURE
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the reser voir tank or the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
WITH CONSULT-III
1. Check the coolant level in the reservoir tank and radiator. Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1412," Diagnosis Procedure " or
EC-1412, " Diagnosis Procedure " .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1412," Diagnosis Procedure " or
EC-1412, " Diagnosis Procedure " .
3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-III.
5. If the results are NG, go to EC-1412, " Diagnosis Procedure " or
EC-1412, " Diagnosis Procedure " .
WITH GST
1. Check the coolant level in the reservoir tank and radiator. Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1412," Diagnosis Procedure " .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1412," Diagnosis Procedure " .
3. Perform IPDM/ER auto active te st and check cooling fan motor
operation. Refer to PG-19, " Auto Active Test " .
4. If NG, go to EC-1412, " Diagnosis Procedure " . SEF621W
SEF621W