load capacity NISSAN LATIO 2007 Service Repair Manual

EC-248Revision: June 2006
DTC P0137 HO2S2
2007 Versa
DTC P0137 HO2S2PFP:226A0
Component DescriptionUBS00QFE
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air/fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeUBS00QFF
Specification data are reference values.
On Board Diagnosis LogicUBS00QFG
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity before the three way catalyst (manifold) causes
the longer switching time. To judge the malfunctions of heated oxy-
gen sensor 2, ECM monitors whether the maximum voltage of the
sensor is sufficiently high during the various driving condition such
as fuel-cut.
SEF 3 27 R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)

Revving engine from idle to 3,000 rpm quickly after the follow-
ing conditions are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 MNTR (B1) LEAN ←→ RICH
SEF 2 59 VA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0137
0137Heated oxygen sensor 2 cir-
cuit low voltageThe maximum voltage from the sensor is
not reached to the specified voltage.

Harness or connectors
(Heated oxygen sensor 2 circuit open or
shorted.)

Heated oxygen sensor 2

Fuel pressure

Fuel injector

Intake air leaks

DTC P0138 HO2S2
EC-257
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Revision: June 20062007 Versa
DTC P0138 HO2S2PFP:226A0
Component DescriptionUBS00QFN
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air/fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeUBS00QFO
Specification data are reference values.
On Board Diagnosis LogicUBS00QFP
The heated oxygen sensor 2 has a much longer switching time between rich and lean than the air fuel ratio (A/
F) sensor 1. The oxygen storage capacity before the three way catalyst (manifold) causes the longer switching
time.
MALFUNCTION A
To judge the malfunctions of rear heated oxygen sensor 2, ECM
monitors whether the voltage is unusually high during the various
driving condition such as fuel-cut.
MALFUNCTION B
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the minimum voltage of sensor is sufficiently low during the
various driving condition such as fuel-cut.
SEF 3 27 R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)

Revving engine from idle to 3,000 rpm quickly after the follow-
ing conditions are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 MNTR (B1) LEAN ←→ RICH
PBIB2266E
PBIB2376E

DTC P0139 HO2S2
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Revision: June 20062007 Versa
DTC P0139 HO2S2PFP:226A0
Component DescriptionUBS00QFW
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air/fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeUBS00QFX
Specification data are reference values.
On Board Diagnosis LogicUBS00QFY
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity before the three way catalyst (manifold) causes
the longer switching time. To judge the malfunctions of heated oxy-
gen sensor 2, ECM monitors whether the switching response of the
sensor's voltage is faster than specified during the various driving
condition such as fuel-cut.
SEF 3 27 R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)

Revving engine from idle to 3,000 rpm quickly after the following condi-
tions are met.
–Engine: After warming up
–Keep the engine speed between 3,500 rpm and 4,000 rpm for 1 minute
and idle for 1 minute under no load0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 MNTR (B1)LEAN ←→ RICH
SEF 3 02 U
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139
0139Heated oxygen sensor 2
circuit slow responseIt takes more time for the sensor to respond
between rich and lean than the specified time.

Harness or connectors
(Heated oxygen sensor circuit is open or
shorted.)

Heated oxygen sensor 2

Fuel pressure

Fuel injector

Intake air leaks

EC-334Revision: June 2006
DTC P0420 THREE WAY CATALYST FUNCTION
2007 Versa
DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicUBS00QHO
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated
oxygen sensor 2 approaches a specified limit value, the three way
catalyst (manifold) malfunction is diagnosed.
DTC Confirmation ProcedureUBS00QHP
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.
WITH CONSULT-II
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine and warm it up to the normal operating tempera-
ture.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70°C
(158°F).
If not, warm up engine and go to next step when “COOLAN
TEMP/S” indication reaches to 70°C (158°F).
7. Open engine hood.
SEF 4 84 YB
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420Catalyst system efficiency
below threshold

Three way catalyst (manifold) does not operate
properly.

Three way catalyst (manifold) does not have
enough oxygen storage capacity.

Three way catalyst (manifold)

Exhaust tube

Intake air leaks

Fuel injector

Fuel injector leaks

Spark plug

Improper ignition timing
SEF 1 89 Y

EM-78Revision: June 2006
CYLINDER BLOCK
2007 Versa
Disassembly and AssemblyEBS00U7X
DISASSEMBLY
1. Remove engine and transaxle assembly from vehicle, separate transaxle from engine. Refer to EM-73,
"ENGINE ASSEMBLY" .
2. Install engine to engine stand as follows;
a. Remove flywheel (M/T models) or drive plate (1) (A/T or CVT
models).

Secure flywheel (M/T models) or drive plate (A/T or CVT mod-
els) using Tool (A), and remove bolts.
CAUTION:
Be careful not to damage or scratch drive plate (A/T or CVT
models) and contact surface for clutch disc of flywheel (M/T
models).
NOTE:
Figure shows drive plate (A/T or CVT models)
b. Lift the engine with a hoist to install it onto widely use engine stand.
CAUTION:

Use the engine stand that has a load capacity [approximately 135 kg (298 lb) or more] large
enough for supporting the engine weight.

If the load capacity of stand is not adequate, remove the following parts beforehand to reduce the
potential risk of overturning stand.
–Exhaust manifold; Refer to EM-21, "EXHAUST MANIFOLD" .
–Rocker cover; Refer to EM-30, "IGNITION COIL, SPARK PLUG AND ROCKER COVER" .
NOTE:
The figure shows an example of widely used engine stand (A)
that can support mating surface of transaxle with flywheel (M/T
models) or drive plate (A/T or CVT models) removed.
CAUTION:
Before removing the hanging chains, make sure the engine
stand is stable and there is no risk of overturning.
3. Remove oil pan (upper and lower). Refer to EM-24, "
OIL PAN" .
4. Remove cylinder head. Refer to EM-62, "
CYLINDER HEAD" .
5. Remove thermostat housing. Refer to CO-18, "
THERMOSTAT" .
1. Cylinder block 2. O-ring 3. Crankshaft position sensor (POS)
4.Crankshaft position sensor (POS)
cover5.Oil filter (for intake valve timing con-
trol)6. Knock sensor
7. Oil pressure switch 8. Top ring 9. Second ring
10. Oil ring 11. Snap ring 12. Piston
13. Piston pin 14. Connecting rod 15. Thrust bearing
16. Connecting rod bearing upper 17. Main bearing upper 18. Crankshaft key
19. Main bearing lower 20. Connecting rod bearing lower 21. Connecting rod bearing cap
22. Connecting rod bolt 23. Main bearing cap 24. Main bearing cap bolt
25. Crankshaft 26. Pilot converter (A/T or CVT models) 27. Signal plate
28. Rear oil seal 29. Drive plate (A/T or CVT models) 30. Reinforcement plate (A/T or CVT
models)
31. Flywheel (M/T models) 32. Block heater (Canada only) A. Refer to EM-81
Tool number : KV 11105210 (J-44716)
PBIC3226J
PBIC3227J

SERVICE DATA AND SPECIFICATIONS (SDS)
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Revision: June 20062007 Versa
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
BatteryEKS00HV5
StarterEKS00HV6
AlternatorEKS00HV7
NAM M/T, A/T USA/CAN CVT
Type TR4 Gr.51 R
20 hours rate capacity 12 V - 47 AH 12 V - 47 AH
Cold Cranking Amps. (CCA) 470 470
Typ eS114 - 901
HITACHI make
Reduction gear type
System voltage12 V
No-loadTerminal voltage 11 V
Current Less than 110 A
Revolution More than 3,000 rpm
Minimum diameter of commutator 28.0 mm (1.102 in)
Minimum length of brush 10.5 mm (0.413 in)
Brush spring tension16.2 N (1.65 kg, 3.64 lb)
Clearance between bearing metal and armature shaft Less than 0.2 mm (0.008 in)
Movement “L” in height of pinion assembly 0.3 - 2.5 mm (0.012 - 0.098 in)
Ty peLR1140 - 803
MITSUBISHI make
Nominal rating12 V - 140 A
Ground polarityNegative
Minimum revolution under no-load (when 13.5 V is applied) Less than 1,200 rpm
Hot output current (when 13.5 V is applied)More than 27 A/1,300 rpm
More than 95 A/2,500 rpm
More than 116 A/5,000 rpm
Regulated output voltage14.1 - 14.7 V
Minimum length of brush More than 6.00 mm (0.236 in)
Brush spring pressure 1.1 - 3.7 N (112 - 378 g, 4.00 - 13.3 oz)
Slip ring minimum outer diameter More than 14.7 mm (0.579 in)
Rotor (field coil) resistance 1.61 - 1.91 Ω