NISSAN LATIO 2009 Service Repair Manual

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) —

Air cleaner
EM-139Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator) 5 5 5 5 EM-139Electric throttle control actuator
EM-141Air leakage from intake manifold/
Collector/Gasket EM-141Cranking Battery
1 1 1 1 1 1
11
SC-7 Generator circuit
SC-22Starter circuit 3
SC-16Signal plate 6
EM-200Park/neutral position (PNP)
switch 4 MT-54 ,
AT-95 ,
CVT-252 Engine Cylinder head
5 5 5 5 5 5 5 5 EM-186Cylinder head gasket 4 3
Cylinder block
6 6 6 6 6 6 6 6 4
EM-200 Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Valve
mecha-
nism Timing chain
5 5 5 5 5 5 5 5 EM-161Camshaft
EM-170Intake valve timing control
EM-161Intake valve
3EM-189 Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/ Gasket 5 5 5 5 5 5 5 5 EM-144 ,
EX-9 Three way catalyst
Lubrica-
tion Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery 5 5 5 5 5 5 5 5 EM-147 ,
LU-19 Oil level (Low)/Filthy oil
LU-16SYMPTOM
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

EC
NP
O
1 - 6: The numbers refer to the order of inspection.
Cooling Radiator/Hose/Radiator filler cap
5 5 5 5 5 5 5 4 5 CO-38Thermostat
5CO-45 Water control valve
CO-47Water pump
CO-43Water gallery
CO-34Cooling fan
5CO-42 Coolant level (Low)/Contaminat-
ed coolant CO-35NVIS (NISSAN Vehicle
Immobilizer System-
NATS) 1 1
BL-257 SYMPTOM
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

EC-1100< SERVICE INFOMATION >
[MR TYPE 2]
TROUBLE DIAGNOSIS
Engine Control Comp onent Parts Location INFOID:0000000004499941
1. Ignition coil (with power transistor) and spark plug 2. Intake valve timing control solenoid
valve 3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector 6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake air temperature sensor) 11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built-in throttle position sensor,
throttle control motor)
13. EVAP canister purge volume control solenoid valve PBIB3261E

TROUBLE DIAGNOSIS
EC-1101
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
: Vehicle front
1. Mass air flow sensor (with intake air temperature sensor) 2. Engine coolant temperature sensor 3. Electric throttle control actuator
(with built in throttle position sensor,
throttle control motor)
4. PCV valve 5. Cooling fan motor 6. Resistor
7. Refrigerant pressure sensor BBIA0724E

EC-1102< SERVICE INFOMATION >
[MR TYPE 2]
TROUBLE DIAGNOSIS
: Vehicle front
1. Intake valve timing control solenoid valve 2. Knock sensor 3. IPDM E/R
4. Fuel pump fuse (15A) 5. Fuel level sensor unit and fuel pump harness connector (view with in-
spection hole cover removed) 6. Fuel level sensor unit and fuel pump
7. Fuel pressure regulator 8. Fuel level sensor 9. Fuel tank temperature sensor
10. Ignition coil (with power transistor) and spark plug 11. Fuel injector BBIA0725E

TROUBLE DIAGNOSIS
EC-1103
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
:
Vehicle front
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. EVAP canister purge volume control solenoid valve
4. EVAP service port 5. ECM harness connector 6. ECM
7. Stop lamp switch 8. Accelerator pedal position sensor BBIA0727E

EC-1104< SERVICE INFOMATION >
[MR TYPE 2]
TROUBLE DIAGNOSIS
: Vehicle front
1. Air fuel ratio (A/F) sensor 1 2. Three way catalyst (Manifold) 3. Heated oxygen sensor 2
4. Three way catalyst (Under floor) 5. Muffler 6. Air fuel ratio (A/F) sensor 1 harness connector
7. Heated oxygen sensor 2 harness connector BBIA0726E