Infiniti QX56 (Z62). Manual - part 622

 

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Infiniti QX56 (Z62). Manual - part 622

 

 

EC-466

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

DTC Logic

INFOID:0000000006217970

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-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

Diagnosis Procedure

INFOID:0000000006217971

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 and the housing.

Is the inspection result normal?

YES

>> GO TO 2.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2119

ETC ACTR-B1
(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.

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-467

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> Remove the foreign matter and clean the electric throttle control actuator inside, then perform

throttle valve closed position learning. Refer to 

EC-147, "Work Procedure"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Refer to 

EM-30, "Removal and Installation"

.

>> INSPECTION END

EC-468

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2122, P2123 APP SENSOR

P2122, P2123 APP SENSOR

DTC Logic

INFOID:0000000006217972

DTC DETECTION LOGIC

NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, perform the trouble diagnosis for DTC P0643.
Refer to 

EC-381, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 8 V or more 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-468, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217973

1.

CHECK ACCELERATOR PEDAL POSITION 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

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and APP sensor
• Loose or poor connection for each connector and harness

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2122

APP SEN 1/CIRC
(Accelerator pedal position 
sensor 1 circuit low input)

An excessively low voltage from the APP 
sensor 1 is sent to ECM.

• Harness or connectors

(APP sensor 1 circuit is open or shorted.)

• Accelerator pedal position sensor

(APP sensor 1)

P2123

APP SEN 1/CIRC
(Accelerator pedal position 
sensor 1 circuit high input)

An excessively high voltage from the APP 
sensor 1 is sent to ECM.

APP sensor

Ground

Voltage (V)

Connector

Terminal

E110

(Without ICC)

2

Ground

Approx. 5

E67

(With ICC)

12

P2122, P2123 APP SENSOR

EC-469

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

>> 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 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between ECM and APP sensor
• Loose or poor connection for each connector and harness

>> Repair open circuit, short to ground or short to power in harness or connectors.

5.

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 7.

NO

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Loose or poor connection for each connector and harness
• Harness for open or short between ECM and APP sensor

>> Repair open circuit, short to ground or short to power in harness or connectors.

7.

CHECK APP SENSOR

Refer to 

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

REPLACE ACCELERATOR PEDAL ASSEMBLY

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

(Without ICC)

4

E80

140

Existed

E67

(With ICC)

11

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

(Without ICC)

3

E80

136

Existed

E67

(With ICC)

10

 

 

 

 

 

 

 

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