Nissan Altima L32. Manual - part 326

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-425

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Description

INFOID:0000000004349479

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 feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle

valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening

angle properly in response to driving condition.

DTC Logic

INFOID:0000000004349480

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. Set shift lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3. Set shift lever to P (CVT) or Neutral (M/T) position.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Turn ignition switch ON and wait at least 1 second.

6. Set shift lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

7. Set shift lever to P (CVT) or Neutral (M/T) position.

8. Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.

9. Check DTC.
Is DTC detected?

YES

>> Go to 

EC-425, "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. Set shift lever to D (CVT) or 1st (M/T) position and wait at least 3 seconds.

3. Set shift lever to N, P (CVT) or Neutral (M/T) position.

4. Start engine and let it idle for 3 seconds.

5. Check DTC.
Is DTC detected?

YES

>> Go to 

EC-425, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349481

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2119

Electric throttle control 
actuator

A)

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 detect the throttle valve is stuck open.

EC-426

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

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-426, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000004349482

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-29, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-30, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

2.

Electric throttle control actuator

: Vehicle front

ALBIA0061ZZ

P2122, P2123 APP SENSOR

EC-427

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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P2122, P2123 APP SENSOR

Description

INFOID:0000000004349483

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 potentiometers 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 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

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 the engine oper-

ation such as fuel cut.

DTC Logic

INFOID:0000000004349484

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-362, "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 8V 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-427, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349485

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

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

(APP sensor 1 circuit is open or shorted.)

• Accelerator pedal position sensor

(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.

EC-428

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P2122, P2123 APP SENSOR

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 or 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 or 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 or short to ground or short to power in harness or connectors.

5.

CHECK APP SENSOR

Refer to 

EC-429, "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. Go to 

EC-429, "Special Repair Requirement"

.

>> INSPECTION END

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

APP sensor

Ground

Voltage

Connector Terminal

E40

5

Ground

Approx. 5 V

PBIA9607J

APP sensor

ECM

Continuity

Connector Terminal Connector Terminal

E40

4

E10

84

Existed

APP sensor

ECM

Continuity

Connector Terminal Connector Terminal

E40

3

E10

81

Existed