2009 NISSAN LATIO air condition

EC
NP
O
P0507 ISC SYSTEM
Description INFOID:0000000004780227
The ECM controls the engine idle speed to a specified leve l through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idli ng speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is t he lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
DTC Logic INFOID:0000000004780228
DTC DETECTION LOGIC NOTE:
If DTC P0507 is displayed with ot her DTC, first perform the trouble diagnosis for the other DTC.
DTC CONFIRMATION PROCEDURE IDLE AIR VOLUME LEARNING :
Special Repair Requirement " , before conducting DTC Confirmation Procedure.
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
• Always perform the test at a temperature above −10 °C(14 °F).
>> GO TO 2. YES >> Go to
EC-351, " Diagnosis Procedure " .
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004780229YES >> GO TO 2.
NO >> Repair or replace.

EC
NP
O
P0607 ECM
Description INFOID:0000000004780240
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
DTC Logic INFOID:0000000004780241
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE YES >> Go to
EC-357, " Diagnosis Procedure " .
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004780242Diagnosis Description "
3. Perform DTC CONFIRMATION PROCEDURE. Refer to
EC-357, " DTC Logic " .
4. Check DTC.
Is the DTC P0607 displayed again? YES >> GO TO 2.
NO >> INSPECTION END ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment " .
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0607 CAN communication bus When detecting error during the initial diagnosis
of CAN controller of ECM. • ECM

EC-372< COMPONENT DIAGNOSIS >
[HR16DE]
P1225 TP SENSOR
P1225 TP SENSOR
Description INFOID:0000000004780253
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC Logic INFOID:0000000004780254
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
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 10 V at idle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
Is 1st trip DTC detected? YES >> Go to
EC-372, " Diagnosis Procedure " .
NO >> INSPECTION END
Diagnosis Procedure INFOID:00000000047802551.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct. PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1225 Closed throttle position
learning performance Closed throttle position learning value is excessively
low. • Electric throttle control actuator
(TP sensor 1 and 2)

EC-374< COMPONENT DIAGNOSIS >
[HR16DE]
P1226 TP SENSOR
P1226 TP SENSOR
Description INFOID:0000000004780257
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.
DTC Logic INFOID:0000000004780258
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.
PRECONDITIONING
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 10 V at idle.
>> GO TO 2. 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn ignition switch OFF, wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 2 and 3 for 32 times.
5. Check 1st trip DTC.
Is 1st trip DTC detected? YES >> Go to
EC-374, " Diagnosis Procedure " .
NO >> INSPECTION END
Diagnosis Procedure INFOID:00000000047802591.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct. PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226 Closed throttle position
learning performance Closed throttle position learning is not performed
successfully, repeatedly. • Electric throttle control actuator
(TP sensor 1 and 2)

EC-390< COMPONENT DIAGNOSIS >
[HR16DE]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
YES >> GO TO 2.
NO >> Repair or replace ground connection. 2.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1. Check the voltage between ECM harness connector and ground under the following conditions.
Is the inspection result normal? YES >> GO TO 9.
NO >> GO TO 3. 3.
CHECK THROTTLE CONTROL MOTO R RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between ECM harnes s connector and IPDM E/R harness connector.
5. Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 4. 4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors. 5.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Check the continuity between ECM harnes s connector and IPDM E/R harness connector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 7.
NO >> GO TO 6. 6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
ECM
Ground Condition Voltage
Connector Terminal
F10 2 Ground Ignition switch: OFF Approx. 0 V
Ignition switch: ON Battery voltage PBIA9568J
IPDM E/R ECM
Continuity
Connector Terminal Connector Terminal
E46 46 F10 15 Existed IPDM E/R ECM
Continuity
Connector Terminal Connector Terminal
E43 8 F10 2 Existed

Diagnosis Procedure " .
>> INSPECTION END
Component Inspection INFOID:0000000004780321YES >> INSPECTION END
NO >> GO TO 2. Special Repair Requirement " .
>> INSPECTION END
Special Repair Requirement INFOID:0000000004780322ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Special Repair Requirement " .
>> GO TO 2. THROTTLE VALVE CLOSED POSITION LE
ARNING : Special Repair Requirement " .
>> GO TO 3. IDLE AIR VOLUME LEARNING : Special Repair Requirement " .
>> END ECM
Ground Condition Voltage
Connector Terminal
E16 110
(APP sensor 1 signal) GroundAccelerator
pedal Fully released 0.6 - 0.9 V
Fully depressed 3.9 - 4.7 V
103
(APP sensor 2 signal) Fully released 0.3 - 0.6 V
Fully depressed 1.95 - 2.4 V

EC-406< COMPONENT DIAGNOSIS >
[HR16DE]
P2127, P2128
APP SENSOR
4. Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK APP SENSOR 2 INPUT SIGN AL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between APP sens or harness connector and ECM harness connector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 8.
NO >> Repair open circuit or short to ground or short to power in harness or connectors. 8.
CHECK APP SENSOR
Refer to EC-406, " Component Inspection " .
Is the inspection result normal? YES >> GO TO 10.
NO >> GO TO 9. 9.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-407, " Special Repair Requirement " .
>> INSPECTION END 10.
CHECK INTERMITTENT INCIDENT
Refer to EC-120, " Diagnosis Procedure " .
>> INSPECTION END
Component Inspection INFOID:00000000047803261.
CHECK ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal? APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E12 1 E16 104 Existed APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E12 6 E16 103 Existed ECM
Ground Condition Voltage
Connector Terminal
E16 110
(APP sensor
1 signal) GroundAccelerator
pedal Fully released 0.6 - 0.9 V
Fully depressed 3.9 - 4.7 V
103
(APP sensor 2 signal) Fully released 0.3 - 0.6 V
Fully depressed 1.95 - 2.4 V PBIA9572J

P2135 TP SENSOR
EC-411
< COMPONENT DIAGNOSIS >
[HR16DE] C
D E
F
G H
I
J
K L
M A EC
NP
O 7.
CHECK INTERMITTENT INCIDENT
Refer to EC-120, " Diagnosis Procedure " .
>> INSPECTION END
Component Inspection INFOID:00000000047804491.
CHECK THROTTLE POSITION SENSOR
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-411, " Special Repair Requirement " .
4. Turn ignition switch ON.
5. Set selector lever to D (A/T) or 1st (M/T) position.
6. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 2. 2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform EC-411, " Special Repair Requirement " .
>> INSPECTION END
Special Repair Requirement INFOID:00000000047804501.
PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Refer to EC-31, " THROTTLE VALVE CLOSED POSITION L
EARNING : Special Repair Requirement "
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-32, " IDLE AIR VOLUME LEARNING : Special Repair Requirement "
>> ENDECM
Ground Condition Voltage
Connector Terminal
F11 33
(TP sensor
1 signal)
GroundAccelerator
pedal Fully released
More than
0.36V
Fully de-
pressed Less than
4.75V
34
(TP sensor 2 signal) Fully released
Less than
4.75V
Fully de-
pressed More than
0.36V PBIB3038E