sensor NISSAN LATIO 2009 Service Repair Manual

EC-1080< SERVICE INFOMATION >
[MR TYPE 2]
BASIC SERVICE PROCEDURE
OK or NG OK >> GO TO 10.
NG >> GO TO 8. 8.
DETECT MALFUNCTIONING PART
Check the following.
• Check crankshaft position sensor (POS) and circuit.
Refer to EC-1293 .
• Check camshaft position sensor (PHASE) and circuit.
Refer to EC-1299 .
OK or NG OK >> GO TO 9.
NG >> 1. Repair or replace.
2. GO TO 4. 9.
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM f unction. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs.
Refer to BL-249, " ECM Re-communicating Function " .
>> GO TO 4. 10.
CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
- Timing indicator (1)
OK or NG OK >> GO TO 19.
NG >> GO TO 11. 11.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
>> GO TO 12. 12.
PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Perform EC-1084, " Throttle Valve Closed Position Learning " .
>> GO TO 13. 13.
PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-1084, " Idle Air Volume Learning " .
Is Idle Air Volume Lear ning carried out successfully?
Yes or No M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)
M/T: 13 ± 5 ° BTDC (in Neutral position)
A/T: 13 ± 5 ° BTDC (in P or N position)
CVT: 13 ± 5 ° BTDC (in P or N position) PBIB3263E

BASIC SERVICE PROCEDURE
EC-1081
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
Yes >> GO TO 14.
No >> 1. Follow the instruction of Idle Air Volume Learning. 2. GO TO 4. 14.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-III. Refer to EC-1082, " Idle Speed and Igni-
tion Timing Check " .
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
OK or NG OK >> GO TO 15.
NG >> GO TO 17. 15.
CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
- Timing indicator (1)
OK or NG OK >> GO TO 19
NG >> GO TO 16. 16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-161, " Removal and Installation " .
OK or NG OK >> GO TO 17.
NG >> 1. Repair the timing chain installation.
2. GO TO 4. 17.
DETECT MALFUNCTIONING PART
Check the following.
• Check crankshaft position sensor (POS) and circuit. Refer to EC-1293 .
• Check camshaft position s ensor (PHASE) and circuit.
Refer to EC-1299 .
OK or NG OK >> GO TO 18.
NG >> 1. Repair or replace. 2. GO TO 4. 18.
CHECK ECM FUNCTION M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)
M/T: 700 ± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position) M/T: 13
± 5 ° BTDC (in Neutral position)
A/T: 13 ± 5 ° BTDC (in P or N position)
CVT: 13 ± 5 ° BTDC (in P or N position) PBIB3263E

Idle Air Volume Learning " .
VIN Registration INFOID:0000000004499932
DESCRIPTION
VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM ma y be required for Inspection & Maintenance (I/M).
OPERATION PROCEDURE
With CONSULT-III
1. Check the VIN of the vehicle and note it. Refer to GI-43, " Model Variation " .
2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION ” in “WORK SUPPORT” mode.
4. Follow the instruction of CONSULT-III display.
Accelerator Pedal Released Position Learning INFOID:0000000004499933
DESCRIPTION
Accelerator Pedal Released Position Learning is an operati on to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal positi on sensor output signal. It must be performed each time
harness connector of accelerator pedal pos ition sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Clos ed Position Learning INFOID:0000000004499934
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to l earn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal . It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume Learning INFOID:0000000004499935
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the follo wing conditions are missed for even a moment.
• Battery voltage: More than 12.9V (At idle)
• Engine coolant temperature: 70 - 95 °C (158 - 203 °F)
• Park/neutral position (PNP) switch: ON
• Electric load switch: OFF

EC
NP
O
[Air conditioner, headlamp, rear window defogger]
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- Models with CONSULT-III (A/T and CVT models)
• Drive vehicle until “FLUID TEMP SE” in “DATA MONI TOR” mode of “A/T” or “CVT” system indicates less
than 0.9V.
- Models without CONSULT-III (A/T and CVT models) and M/T models
• Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-III
1. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
2. Perform EC-1084, " Throttle Valve Closed Position Learning " .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREP ARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEA RN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Vol-
ume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to
the DIAGNOSTIC PROCEDURE below.
8. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.
Refer to EC-1078, " Basic Inspection " .
Without CONSULT-III
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the di agnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
2. Perform EC-1084, " Throttle Valve Closed Position Learning " .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREP ARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully releas ed, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quick ly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.

TROUBLE DIAGNOSIS
EC-1089
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
TROUBLE DIAGNOSIS
Trouble Diagnosis Introduction INFOID:0000000004499937
INTRODUCTION The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find t he cause of the incidents. A road
test with CONSULT-III (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "WORK FLOW".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driv ability complaint. The customer
can supply good information about such incidents, especially inter-
mittent ones. Find out what symptoms are present and under what
conditions they occur. A Diagnosti c Worksheet like the example on
"Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot drivability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW MEF036D
SEF233G
SEF234G

Diagnosis Procedure " .
Is malfunctioning part detected? Yes >> GO TO 11.
No >> GO TO 9. Symptom Matrix Chart " based on the confirmed symp-
tom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 10. 25, " How to Perform Efficient Diagnosis for an Electrical Incident " .
Is malfunctioning part detected? Yes >> GO TO 11.
No >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-III. Refer to EC-1109, " ECM Terminal and Reference Value " ,
EC-1126, " CONSULT-III Refer-
ence Value in Data Monitor Mode " .
Emission-related Diagnostic Information " .
>> GO TO 12. NG (DTC*
1
is detected)>>GO TO 10.
NG (Symptom remains)>>GO TO 6.
OK >> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC* 1
in ECM
and TCM (Transmission Control Module). (Refer to EC-1052, " Emission-related Diagnostic
Information " and
AT-39, " OBD-II Diagnostic Trouble Code (DTC) " ,
CVT-209, " OBD-II Diag-
nostic Trouble Code (DTC) " .)
2. If the completion of SRT is needed, drive vehicl e under the specific driving pattern. Refer to
EC-1052, " Emission-related Diagnostic Information " .
3. INSPECTION END
*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.
DIAGNOSTIC WORKSHEET
Description

DTC No. Detected items Engine operating condition in fail-safe mode
P0102
P0103 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

EC
NP
O
• When there is an open circuit on MIL circuit, the ECM c
annot warn the driver by lighting up MIL when there
is malfunction on engine control system.
Therefore, when electrical controlled throttle and pa rt of ECM related diagnoses are continuously detected
as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnos es except MIL circuit are detected and demands the
driver to repair the malfunction.
Symptom Matrix Chart INFOID:0000000004499940
SYSTEM — BASIC ENGINE CONTROL SYSTEM P0117
P0118 Engine coolant temperature
sensor circuit Engine coolant temperature will be determined by ECM based on the following condi-
tion.
CONSULT-III displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START 40
°C (104 °F)
Approx. 4 minutes or more after
engine sarting. 80
°C (176 °F)
Except as shown above 40 - 80
°C (104 - 176 °F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cool-
ing fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2100
P2103 Throttle control relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control func- tion ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control actu- ator (When electric throttle control actuator does not function properly due to the return
spring malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control ac tuator by regulating the throttle opening to
20 degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P (A/T, CVT), Neutral (M/T) position, and engine speed
will not exceed 1,000 rpm or more.
P2122
P2123
P2127
P2128
P2138 Accelerator pedal position
sensor The ECM controls the electric throttle control actuator in regulating the throttle opening
in order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
DTC No. Detected items Engine operating condition in fail-safe mode
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4
EC-1086Fuel injector circuit 1 1 2 3 2 2 2 2
EC-1508Evaporative emission system 3 3 4 4 4 4 4 4 4 4
EC-1036Air Positive crankcase ventilation sys-
tem 3 34 4 4 4 4 4 4 4 1
EC-1048Incorrect idle speed adjustment 1 1 1 1 1
EC-1078Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2
EC-1451 ,
EC-1462 Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1
EC-1078Ignition circuit 1 1 2 2 2 2 2 2
EC-1518Main power supply and ground circuit 2 2 3 3 3 3 3 2 3
EC-1139Mass air flow sensor circuit
1
1 2 2
2 2 2 2 EC-1170 ,
EC-1178 Engine coolant temperature sensor circuit
33 3
EC-1189 ,
EC-1192 ,
EC-1202 Air fuel ratio (A/F) sensor 1 circuit
EC-1210 ,
EC-1216 ,
EC-1222 ,
EC-1228 ,
EC-1488 Throttle position sensor circuit
2 2EC-1197 ,
EC-1278 ,
EC-1417 ,
EC-1419 ,
EC-1476 Accelerator pedal position sensor circuit 3 2 1
EC-1396 ,
EC-1464 ,
EC-1469 ,
EC-1481 Knock sensor circuit 2 3
EC-1289Crankshaft position sensor (POS) circuit 2 2
EC-1293Camshaft position sens
or (PHASE) circuit 3 2 EC-1299Vehicle speed signal circuit 2 3 3 3
EC-1387ECM 2 2 3 3 3 3 3 3 3 3 3
EC-1393

EC
NP
O
1 - 6: The numbers refer to the order of inspection.
(continued on next table)
SYSTEM — ENGINE MECHANICAL & OTHER Intake valve timing control solenoid valve cir-
cuit 3 2 1 3 2 2 3 3
EC-1165Park/neutral position (P
NP) switch circuit 3 3 3 3 3 EC-1401Refrigerant pressure sensor circuit 2 3 3 4
EC-1527Electrical load signal circuit 3
EC-1506Air conditioner circuit 2 2 3 3 3 3 3 3 3 3 2
MTC-22ABS actuator and electric unit (control unit) 4
BRC-8SYMPTOM
ReferenceHARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA SYMPTOM
Reference
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank 5
5 FL-9Fuel piping 5 5 5 5 5 5
EM-156Vapor lock
—
Valve deposit 5 5 5 5 5 5 5 —
Poor fuel (Heavy weight gasoline,
Low octane) —