NISSAN TEANA 2008 Service Manual

EC-300
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2118 THROTTLE CONTROL MOTOR
P2118 THROTTLE CONTROL MOTOR
DescriptionINFOID:0000000003856788
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor. The throttle position
sensor provides feedback to the ECM, when opens/closes the throttle valve in response to driving conditions
via the throttle control motor.
DTC LogicINFOID:0000000003856789
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-300, "DTC Logic".
NO >> INSPECTION END
Component InspectionINFOID:0000000003858132
1.CHECK THROTTLE CONTROL MOTOR
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Check resistance between electric throttle control actuator terminals as per the following.
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. Go to EC-299, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000003858127
1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2118Throttle control motor
circuit shortECM detects short in both circuits between
ECM and throttle control motor. Harness or connectors
(Throttle control motor circuit is shorted.)
 Electric throttle control actuator
(Throttle control motor)
Terminals Resistance
5 and 6 Approx. 1 - 15 Ω [at 25°C (77°F)]

P2118 THROTTLE CONTROL MOTOR
EC-301
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Refer to EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-16, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END

EC-302
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
DescriptionINFOID:0000000003856793
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throt-
tle valve and sends the voltage signals to the ECM. The ECM judges the current opening angle of the throttle
valve from these signals and opens/closes the throttle valve in response to driving conditions via the throttle
control motor.
DTC LogicINFOID:0000000003856794
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A AND B
1. Turn ignition switch ON and wait at least 1 second.
2. Selector lever position is D and wait at least 3 seconds.
3. Selector lever position is P.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and wait at least 1 second.
6. Selector lever position is D and wait at least 3 seconds.
7. Selector lever position is P.
8. Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
9. Check DTC.
Is DTC detected?
YES >> Go to EC-303, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Selector lever position is D and wait at least 3 seconds.
3. Selector lever position is N or P.
4. Start engine and let it idle for 3 seconds.
5. Check DTC.
Is DTC detected?
YES >> Go to EC-303, "Diagnosis Procedure".
NO >> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2119Electric throttle control
actuatorA)Electric throttle control actuator does not func-
tion properly due to the return spring malfunc-
tion.
 Electric throttle control actuator
B)Throttle valve opening angle in fail-safe mode is
not in specified range.
C)ECM detects that the throttle valve is stuck
open.

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-303
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Diagnosis ProcedureINFOID:0000000003858131
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve (1)
and the housing.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Go to EC-255, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000003858128
1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-16, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
2: Electric throttle control actuator
JMBIA1390ZZ

EC-304
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2122, P2123 APP SENSOR
P2122, P2123 APP SENSOR
DescriptionINFOID:0000000003856797
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and sends voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for engine opera-
tions such as fuel cut.
DTC LogicINFOID:0000000003856798
DTC DETECTION LOGIC
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-243, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 8 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-304, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856799
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
PBIB1741E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122Accelerator pedal posi-
tion sensor 1 circuit low
inputAn excessively low voltage from the APP sen-
sor 1 is sent to ECM. Harness or connectors
(APP sensor 1 circuit is open or shorted.)
 Accelerator pedal position sensor
(APP sensor 1)
P2123Accelerator pedal posi-
tion sensor 1 circuit high
inputAn excessively high voltage from the APP sen-
sor 1 is sent to ECM.

P2122, P2123 APP SENSOR
EC-305
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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NO >> Repair or replace ground connection.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between APP sensor 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 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK APP SENSOR
Refer to EC-306, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-306, "
Special Repair Requirement".
>> INSPECTION END
7.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
>> INSPECTION END
APP sensor
Ground Voltage (V)
Connector Terminal
E110 4 Ground Approx. 5
APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E110 2 E16 84 Existed
APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E110 3 E16 81 Existed

EC-306
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2122, P2123 APP SENSOR
Component Inspection
INFOID:0000000003856800
1.CHECK ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Go to EC-306, "
Special Repair Requirement".
>> INSPECTION END
Special Repair RequirementINFOID:0000000003856801
1.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to EC-15, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".
>> GO TO 2.
2.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
>> GO TO 3.
3.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-16, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement".
>> END
ECM
Condition Voltage (V) +–
Connector Terminal Connector Terminal
E1681
(APP sensor 1 sig-
nal)
E1684
(Sensor ground)
Accelerator pedalFully released 0.5 - 1.0
Fully depressed 4.2 - 4.8
82
(APP sensor 2 sig-
nal)100
(Sensor ground)Fully released 0.25 - 0.50
Fully depressed 2.0 - 2.5

P2127, P2128 APP SENSOR
EC-307
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P2127, P2128 APP SENSOR
DescriptionINFOID:0000000003858145
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and sends voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for engine opera-
tions such as fuel cut.
DTC LogicINFOID:0000000003856803
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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 8 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-307, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856804
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
PBIB1741E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2127Accelerator pedal posi-
tion sensor 2 circuit low
inputAn excessively low voltage from the APP sen-
sor 2 is sent to ECM. Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
(Refrigerant pressure sensor circuit is
shorted.)
 Accelerator pedal position sensor
(APP sensor 2)
 Crankshaft position sensor (POS)
 Refrigerant pressure sensor P2128Accelerator pedal posi-
tion sensor 2 circuit high
inputAn excessively high voltage from the APP sen-
sor 2 is sent to ECM.

EC-308
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2127, P2128 APP SENSOR
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 3.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit.
4.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair short to ground or short to power in harness or connectors.
5.CHECK COMPONENTS
Check the following.
 Crankshaft position sensor (POS) (Refer to EC-221, "
Component Inspection".)
 Refrigerant pressure sensor (Refer to EC-348, "
Diagnosis Procedure".)
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace malfunctioning components.
6.CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor
Ground Voltage (V)
Connector Terminal
E110 5 Ground Approx. 5
APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E110 5 E16 87 Existed
ECM Sensor
Connector Terminal Name Connector Terminal
F872 Refrigerant pressure sensor E300 1
76 CKP sensor (POS) F20 1
E16 87 APP sensor E110 5
APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E110 1 E16 100 Existed

P2127, P2128 APP SENSOR
EC-309
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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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, short to ground or short to power in harness or connectors.
7.CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between APP sensor 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, short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR
Refer to EC-309, "
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. Refer to EC-310, "
Special Repair Requirement"
>> INSPECTION END
10.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000003858146
1.CHECK ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ACCELERATOR PEDAL ASSEMBLY
APP sensor ECM
Continuity
Connector Terminal Connector Terminal
E110 6 E16 82 Existed
ECM
Condition Voltage (V) +–
Connector Terminal Connector Terminal
E1681
(APP sensor 1 sig-
nal)
E1684
(Sensor ground)
Accelerator pedalFully released 0.5 - 1.0
Fully depressed 4.2 - 4.8
82
(APP sensor 2 sig-
nal)100
(Sensor ground)Fully released 0.25 - 0.50
Fully depressed 2.0 - 2.5