2008 NISSAN LATIO Service Repair Manual

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Page 1569 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P2138 APP SENSOR
EC-495
< SERVICE INFORMATION >
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Wiring DiagramINFOID:0000000001703037
Specification data are reference values and are measured between each terminal

Page 1570 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-496
< SERVICE INFORMATION >
DTC P2138 APP SENSOR
Diagnosis Procedure
INFOID:0000000001703038
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the bod

Page 1571 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P2138 APP SENSOR
EC-497
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Dis

Page 1572 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-498
< SERVICE INFORMATION >
DTC P2138 APP SENSOR
OK or NG
OK >> GO TO 6.
NG >> Repair short to ground or short to power in harness or connectors.
6.CHECK COMPONENTS
Check the following.
• Cranksh

EC-498
< SERVICE INFORMATION >
DTC P2138 APP SENSOR
OK or NG
OK >> GO TO 6.
NG >> Repair short to ground or short to power in harness or connectors.
6.CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to EC-301, "
Component Inspection".)
• EVAP control system pressure sensor (Refer to EC-353, "
Component Inspection".)
• Refrigerant pressure sensor (Refer to MTC-22
.)
OK or NG
OK >> GO TO 11.
NG >> Replace malfunctioning component.
7.CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following;
ECM terminal 111 and APP sensor terminal 2,
ECM terminal 104 and APP sensor terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between the following;
ECM terminal 110 and APP sensor terminal 3,
ECM terminal 103 and APP sensor terminal 6.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK APP SENSOR
Refer to EC-499, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-76, "
Accelerator Pedal Released Position Learning".
3. Perform EC-76, "
Throttle Valve Closed Position Learning".
4. Perform EC-76, "
Idle Air Volume Learning".
ECM terminal Sensor terminalReference Wiring Diagram
74 Refrigerant pressure sensor terminal 3EC-542, "
Wiring Diagram"
75 Crankshaft position sensor (POS) terminal 1EC-297, "Wiring Diagram"
76 EVAP control system pressure sensor terminal 3EC-357, "Wiring Diagram"
102 APP sensor terminal 5EC-495, "Wiring Diagram"
Continuity should exist.
Continuity should exist.

Page 1573 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P2138 APP SENSOR
EC-499
< SERVICE INFORMATION >
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>>INSPECTION END
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
>>INSPECTION END
Component InspectionINFOID:00000

Page 1574 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-500
< SERVICE INFORMATION >
DTC P2A00 A/F SENSOR 1
DTC P2A00 A/F SENSOR 1
Component DescriptionINFOID:0000000001703041
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor.

EC-500
< SERVICE INFORMATION >
DTC P2A00 A/F SENSOR 1
DTC P2A00 A/F SENSOR 1
Component DescriptionINFOID:0000000001703041
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800°C
(1,472°F).
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001703042
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703043
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be
shifted to LEAN side or RICH side.
DTC Confirmation ProcedureINFOID:0000000001703044
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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
PBIB3353E
PBIB3354E
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1) • Engine: After warming upMaintaining engine speed at
2,000 rpmFluctuates around 2.2V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P2A00
2A00Air fuel ratio (A/F) sensor 1
circuit range/performance• The output voltage computed by ECM from the
A/F sensor 1 signal is shifted to the lean side for
a specified period.
• The A/F signal computed by ECM from the A/F
sensor 1 signal is shifted to the rich side for a
specified period.• Air fuel ratio (A/F) sensor 1
• Air fuel ratio (A/F) sensor 1 heater
• Fuel pressure
• Fuel injector
• Intake air leaks

Page 1575 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P2A00 A/F SENSOR 1
EC-501
< SERVICE INFORMATION >
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3. Turn ignition switch ON and select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CON-
SULT-II.
4. C

Page 1576 of 2771

NISSAN LATIO 2008 Service Repair Manual EC-502
< SERVICE INFORMATION >
DTC P2A00 A/F SENSOR 1
Wiring Diagram
INFOID:0000000001703045
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is

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