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

Refer to 

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-465

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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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 

EC-466, "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-466, "Diagnosis Procedure"

.

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 

EC-21, "THROTTLE

VALVE CLOSED POSITION LEARNING : Special

Repair Requirement"

.

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

Refer to 

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

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 >

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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 

EC-394, "DTC 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.

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-467, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010095176

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

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.