2009 NISSAN LATIO air condition

DTC P2127, P2128 APP SENSOR
EC-953
< SERVICE INFOMATION >
[MR TYPE 1] C
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3. Check voltage between ECM terminals 110 (APP sensor 1 sig-
nal), 103 (APP sensor 2 signal) and ground under the following
conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform EC-572, " Accelerator Pedal Released Position Learning " .
6. Perform EC-572, " Throttle Valve Closed Position Learning " .
7. Perform EC-572, " Idle Air Volume Learning " .
Removal and Installation INFOID:0000000004537488
ACCELERATOR PEDAL Refer to ACC-3 .
Terminal Accelerator pedal Voltage
110
(Accelerator pedal position
sensor 1) Fully released 0.6 - 0.9V
Fully depressed 3.9 - 4.7V
103
(Accelerator pedal position
sensor 2) Fully released 0.3 - 0.6V
Fully depressed 1.95 - 2.4V PBIA9572J

EC-956< SERVICE INFOMATION >
[MR TYPE 1]
DTC P2135 TP SENSOR
Diagnosis Procedure INFOID:00000000045374941.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK THROTTLE POSITION SE NSOR POWER SUPPLY CIRCUIT
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
33 LG Throttle position sensor 1 [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released More than 0.36V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressed Less than 4.75V
34 O Throttle position sensor 2 [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released Less than 4.75V
[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressed More than 0.36V
36 Y Sensor ground
(Throttle position sensor) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
72 V Sensor power supply
(Throttle position sensor) [Ignition switch: ON]
Approximately 5V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

DTC P2138 APP SENSOR
EC-965
< SERVICE INFOMATION >
[MR TYPE 1] C
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>>
INSPECTION END 11.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537503
ACCELERATOR PEDAL POSITION SENSOR 1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 110 (APP sensor 1 sig- nal), 103 (APP sensor 2 signal) and ground under the following
conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform EC-572, " Accelerator Pedal Released Position Learning " .
6. Perform EC-572, " Throttle Valve Closed Position Learning " .
7. Perform EC-572, " Idle Air Volume Learning " .
Removal and Installation INFOID:0000000004537504
ACCELERATOR PEDAL Refer to ACC-3 .
Terminal Accelerator pedal Voltage
110
(Accelerator pedal position
sensor 1) Fully released 0.6 - 0.9V
Fully depressed 3.9 - 4.7V
103
(Accelerator pedal position
sensor 2) Fully released 0.3 - 0.6V
Fully depressed 1.95 - 2.4V PBIA9572J

EC-966< SERVICE INFOMATION >
[MR TYPE 1]
DTC P2A00 A/F SENSOR 1
DTC P2A00 A/F SENSOR 1
Component Description INFOID:0000000004537505
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-III Reference Value in Data Monitor Mode INFOID:0000000004537506
Specification data are reference values.
On Board Diagn osis Logic INFOID:0000000004537507
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 Procedure INFOID:0000000004537508
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:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-III
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 up Maintaining engine speed at
2,000 rpm Fluctuates around 2.2VDTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P2A00
2A00 Air 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

DTC P2A00 A/F SENSOR 1
EC-969
< SERVICE INFOMATION >
[MR TYPE 1] C
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis Procedure INFOID:00000000045375101.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
RETIGHTEN AIR FUEL RATIO (A/F) SENSOR 1
Loosen and retighten the air fuel rati o (A/F) sensor 1. Refer to EM-144, " Removal and Installation " .
>> GO TO 3. 3.
CHECK FOR INTAKE AIR LEAK
1. Start engine and run it at idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG OK >> GO TO 4.
NG >> Repair or replace. TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
3 G A/F sensor 1 heater [Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after starting
engine) Approximately 2.9 - 8.8V
49 W A/F sensor 1 [Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm Approximately 1.8V
Output voltage varies with air fuel
ratio.
53 B A/F sensor 1 [Ignition switch: ON]Approximately 2.2V PBIA8148J
:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

ASCD BRAKE SWITCH
EC-979
< SERVICE INFOMATION >
[MR TYPE 1] C
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• Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors. 13.
CHECK STOP LAMP SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 99 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 14.
CHECK STOP LAMP SWITCH
Refer to EC-914, " Component Inspection " .
OK or NG OK >> GO TO 15.
NG >> Replace stop lamp switch. 15.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537516
ASCD BRAKE SWITCH 1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check continuity between ASCD brake switch terminals 1 and 2 under the following conditions.
If NG, adjust ASCD brake switch installation, refer to BR-6 , and
perform step 3 again.
ASCD CLUTCH SWITCH 1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector. Continuity should exist.
Condition Continuity
Brake pedal: Fully released. Should exist.
Brake pedal: Slightly depressed. Should not exist. SEC023D

EC-986< SERVICE INFOMATION >
[MR TYPE 1]
FUEL INJECTOR
FUEL INJECTOR
Component Description INFOID:0000000004537523
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
CONSULT-III Reference Value in Data Monitor Mode INFOID:0000000004537524
Specification data are reference values. PBIA9664J
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL See EC-618 .
INJ PULSE-B1 • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• No load Idle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec

EC
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REFRIGERANT PRESSURE SENSOR
Component Description INFOID:0000000004537540
The refrigerant pressure sensor (1) is installed at the condenser of
the air conditioner system. The sens or uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
• : Vehicle front