Nissan Maxima. Manual — part 495
EC-464
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P2118 THROTTLE CONTROL MOTOR
Special Repair Requirement
INFOID:0000000010095169
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-465
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
Description
INFOID:0000000010095170
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 Logic
INFOID:0000000010095171
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> 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
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
NO
>> INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2119
Electric throttle control
actuator
A)
Electric throttle control actuator does not function
properly due to the return spring malfunction.
• 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.
EC-466
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
Diagnosis Procedure
INFOID:0000000010095172
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct. Refer to
EM-24, "Removal and Installation"
.
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, and then perform throttle valve
closed position learning. Refer to
VALVE CLOSED POSITION LEARNING : Special
.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. Refer to
EM-25, "Removal and Installation"
2. Go to
EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000010095173
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
2: Electric throttle control actuator
: Vehicle front
ALBIA0611ZZ
P2122, P2123 APP SENSOR
EC-467
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P2122, P2123 APP SENSOR
Description
INFOID:0000000010095174
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 sends opening and closing speed of the
accelerator pedal and feed the 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 sig-
nals.
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 Logic
INFOID:0000000010095175
DTC DETECTION LOGIC
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010095176
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2122
Accelerator pedal posi-
tion sensor 1 circuit low
input
An excessively low voltage from the APP sen-
sor 1 is sent to ECM.
• Harness or connectors
[Accelerator pedal position (APP) sensor
1 circuit is open or shorted.]
• APP sensor 1
P2123
Accelerator pedal posi-
tion sensor 1 circuit high
input
An excessively high voltage from the APP sen-
sor 1 is sent to ECM.
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