Nissan Pathfinder (2008 year). Manual - part 280

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

EC-357

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

OK

>> GO TO 8.

NG

>> Replace 20A fuse.

6.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector E119.

4.

Check continuity between ECM terminal 3 and IPDM E/R terminal 6.
Refer to Wiring Diagram.

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E2, F32
• Harness for open or short between ECM and IPDM E/R

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

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-47, "Work Flow"

.

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation of IPDM E/R"

.

NG

>> Repair or replace harness or connectors.

9.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Disconnect ECM harness connector.

4.

Check harness continuity between the following terminals.
Refer to Wiring Diagram.

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 10.

NG

>> Repair or replace.

10.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 

1.

Remove the intake air duct.

Continuity should exist.

Electric throttle control 

actuator terminal

ECM terminal

Continuity

5

5

Should not exist

4

Should exist

6

5

Should exist

4

Should not exist

BBIA0543E

EC-358

< COMPONENT DIAGNOSIS >

[VQ40DE]

P2101 ELECTRIC THROTTLE CONTROL FUNCTION

2.

Check if foreign matter is caught between the throttle valve and
the housing.

OK or NG

OK

>> GO TO 11.

NG

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

11.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-358, "Component Inspection"

.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 13.

12.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-47, "Work Flow"

.

OK or NG

OK

>> GO TO 13.

NG

>> Repair or replace harness or connectors.

13.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-26, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-26, "Idle Air Volume Learning"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001376439

THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Check resistance between terminals 5 and 6.

3.

If NG, replace electric throttle control actuator and go to next
step.

4.

Perform 

EC-26, "Throttle Valve Closed Position Learning"

.

5.

Perform 

EC-26, "Idle Air Volume Learning"

.

BBIA0554E

Resistance: Approximately 1 - 15 

Ω

 [at 25 

°

C (77

°

F)]

PBIB2606E

P2118 THROTTLE CONTROL MOTOR

EC-359

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2118 THROTTLE CONTROL MOTOR

Component Description

INFOID:0000000001376440

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 and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.

On Board Diagnosis Logic

INFOID:0000000001376441

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

INFOID:0000000001376442

1.

If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.

a.

Turn ignition switch OFF and wait at least 10 seconds.

b.

Turn ignition switch ON.

c.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON and wait at least 2 seconds.

3.

Start engine and let it idle for 5 seconds.

4.

Check DTC.

5.

If DTC is detected, go to 

EC-359, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001376444

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body. Refer to 

EC-96, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2118
2118

Throttle control motor 
circuit short

ECM 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)

Engine operating condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return 
spring.

BBIA0539E

EC-360

< COMPONENT DIAGNOSIS >

[VQ40DE]

P2118 THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between the following terminals.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-360, "Component Inspection"

.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-47, "Work Flow"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness or connectors.

5.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-26, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-26, "Idle Air Volume Learning"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001376445

THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Check resistance between terminals 5 and 6.

3.

If NG, replace electric throttle control actuator and go to next
step.

4.

Perform 

EC-26, "Throttle Valve Closed Position Learning"

.

5.

Perform 

EC-26, "Idle Air Volume Learning"

.

Electric throttle control 

actuator terminal

ECM terminal

Continuity

5

5

Should not exist

4

Should exist

6

5

Should exist

4

Should not exist

BBIA0543E

Resistance: Approximately 1 - 15 

Ω

 [at 25 

°

C (77

°

F)]

PBIB2606E

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-361

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Component Description

INFOID:0000000001376449

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.

On Board Diagnosis Logic

INFOID:0000000001376450

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

INFOID:0000000001376451

NOTE:
• Perform PROCEDURE FOR MALFUNCTION A AND B first. If the DTC cannot be confirmed, perform

PROCEDURE FOR MALFUNCTION C.

• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

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.

PROCEDURE FOR MALFUNCTION A AND B

1.

Turn ignition switch ON and wait at least 1 second.

2.

Shift selector lever to D position and wait at least 3 seconds.

3.

Shift selector lever to P position.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON and wait at least 1 second.

6.

Shift selector lever to D position, and wait at least 3 seconds.

7.

Shift selector lever to P position.

8.

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

9.

Check DTC.

10. If DTC is detected, go to 

EC-362, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION C

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2119
2119

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.

Detected items

Engine operating condition in fail-safe mode

Malfunction A

The ECM controls the electric throttle actuator by regulating the throttle opening around the idle position. 
The engine speed will not rise more than 2,000 rpm.

Malfunction B

ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.

Malfunction C

While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or more.

EC-362

< COMPONENT DIAGNOSIS >

[VQ40DE]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

 With CONSULT-III

1.

Turn ignition switch ON and wait at least 1 second.

2.

Shift selector lever to D position and wait at least 3 seconds.

3.

Shift selector lever to P or N position.

4.

Start engine and let it idle for 3 seconds.

5.

Check DTC.

6.

If DTC is detected, go to 

EC-362, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001376452

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Remove the intake air duct.

2.

Check if a foreign matter is caught between the throttle valve
and the housing.

OK or NG

OK

>> GO TO 2.

NG

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-26, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-26, "Idle Air Volume Learning"

.

>> INSPECTION END

BBIA0554E

P2122, P2123 APP SENSOR

EC-363

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2122, P2123 APP SENSOR

Component Description

INFOID:0000000001376456

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.

On Board Diagnosis Logic

INFOID:0000000001376458

These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-299

.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

INFOID:0000000001376459

NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
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 10V at idle.
1.

Start engine and let it idle for 1 second.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-364, "Diagnosis Procedure"

.

PBIB1741E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2122
2122

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

(The APP sensor 1 circuit is open or 
shorted.)

• Accelerator pedal position sensor

(APP sensor 1)

P2123
2123

Accelerator pedal posi-
tion sensor 1 circuit high 
input

An excessively high voltage from the APP sen-
sor 1 is sent to ECM.

Engine operating condition in fail-safe mode

The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor. 

EC-364

< COMPONENT DIAGNOSIS >

[VQ40DE]

P2122, P2123 APP SENSOR

Diagnosis Procedure

INFOID:0000000001376461

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body. Refer to 

EC-96, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between APP sensor terminal 2 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> 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 harness continuity between APP sensor terminal 4 and ECM terminal 82.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 4.

NG

>> 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 harness continuity between ECM terminal 106 and APP sensor terminal 3.

BBIA0539E

Voltage: Approximately 5V

BBIA0556E

PBIB2608E

Continuity should exist.