Nissan Pathfinder (2008 year). Manual - part 339

EC-829, "Component Inspection"

OK or NG

>> GO TO 12.

>> GO TO 13.

12.

CHECK INTERMITTENT INCIDENT

GI-51, "Intermittent Incident"

OK or NG

>> GO TO 13.

>> Repair or replace harness or connectors.

13.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace the electric throttle control actuator.

>> INSPECTION END

Component Inspection

INFOID:0000000001537954

THROTTLE CONTROL MOTOR

Disconnect electric throttle control actuator harness connector.

Check resistance between terminals 5 and 6.

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

EC-830, "Diagnosis Procedure"

BBIA0371E

Resistance: Approximately 1 - 15

Ω

[at 25

C (77

F)]

PBIB2066E

EC-830

< COMPONENT DIAGNOSIS >

[VK56DE]

P2118 THROTTLE CONTROL MOTOR

P2118 THROTTLE CONTROL MOTOR

Component Description

INFOID:0000000001537955

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:0000000001537956

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:0000000001537957

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

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON and wait at least 2 seconds.

Start engine and let it idle for 5 seconds.

Check DTC.

If DTC is detected, go to

Diagnosis Procedure

INFOID:0000000001537958

CHECK GROUND CONNECTIONS

Turn ignition switch OFF.

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

EC-565, "Ground Inspection"

OK or NG

>> GO TO 2.

>> Repair or replace ground connections.

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

P2118 THROTTLE CONTROL MOTOR

EC-831

< COMPONENT DIAGNOSIS >

[VK56DE]

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

Disconnect electric throttle control actuator harness connector.

Disconnect ECM harness connector.

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

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

OK or NG

>> GO TO 3.

>> Repair or replace.

CHECK THROTTLE CONTROL MOTOR

EC-831, "Component Inspection"

OK or NG

>> GO TO 4.

>> GO TO 5.

CHECK INTERMITTENT INCIDENT

GI-51, "Intermittent Incident"

OK or NG

>> GO TO 5.

>> Repair or replace harness or connectors.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace the electric throttle control actuator.

>> INSPECTION END

Component Inspection

INFOID:0000000001537959

THROTTLE CONTROL MOTOR

Disconnect electric throttle control actuator harness connector.

Check resistance between terminals 5 and 6.

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

EC-833, "Diagnosis Procedure"

Electric throttle control

actuator terminal

ECM terminal

Continuity

Should not exist

4 Should

exist

Should exist

Should not exist

BBIA0371E

Resistance: Approximately 1 - 15

Ω

[at 25

C (77

F)]

PBIB2066E

EC-832

< COMPONENT DIAGNOSIS >

[VK56DE]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Component Description

INFOID:0000000001537960

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:0000000001537961

This self-diagnosis has one trip detection logic.

FAIL-SAFE MODE

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

DTC Confirmation Procedure

INFOID:0000000001537962

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 turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

PROCEDURE FOR MALFUNCTION A AND B

Turn ignition switch ON and wait at least 1 second.

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

Shift selector lever to P or N position.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON and wait at least 1 second.

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

Shift selector lever to P or N position.

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

Check DTC.

10. If DTC is detected, go to

PROCEDURE FOR MALFUNCTION C

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2119
2119

Electric throttle control
actuator

Electric throttle control actuator does not func-
tion properly due to the return spring malfunc-
tion.

• Electric throttle control actuator

Throttle valve opening angle in fail-safe mode is
not in specified range.

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.

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-833

< COMPONENT DIAGNOSIS >

[VK56DE]

Turn ignition switch ON and wait at least 1 second.

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

Shift selector lever to P position.

Start engine and let it idle for 3 seconds.

Check DTC.

If DTC is detected, go to

EC-833, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000001537963

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

Remove the intake air duct.

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

OK or NG

>> GO TO 2.

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace the electric throttle control actuator.

EC-834, "Diagnosis Procedure"

>> INSPECTION END

BBIA0371E

EC-834

< COMPONENT DIAGNOSIS >

[VK56DE]

P2122, P2123 APP SENSOR

P2122, P2123 APP SENSOR

Component Description

INFOID:0000000001537964

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:0000000001537965

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-770

FAIL-SAFE MODE

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

DTC Confirmation Procedure

INFOID:0000000001537966

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.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V at idle.
1.

Start engine and let it idle for 1 second.

Check DTC.

If DTC is detected, go to

Diagnosis Procedure

INFOID:0000000001537967

CHECK GROUND CONNECTIONS

PBIB1741E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2122
2122

Accelerator pedal position
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

(Accelerator pedal position sensor 1)

P2123
2123

Accelerator pedal position
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.

P2122, P2123 APP SENSOR

EC-835

< COMPONENT DIAGNOSIS >

[VK56DE]

Turn ignition switch OFF.

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

EC-565, "Ground Inspection"

OK or NG

>> GO TO 2.

>> Repair or replace ground connections.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

Disconnect accelerator pedal position (APP) sensor (1) harness
connector.

Turn ignition switch ON.

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

OK or NG

>> GO TO 3.

>> Repair open circuit or short to ground or short to power

in harness or connectors.

CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Disconnect ECM harness connector.

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

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

OK or NG

>> GO TO 4.

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

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal 106 and APP sensor terminal 3.
Refer to Wiring Diagram.

BBIA0539E

AWBIA0079ZZ

Voltage: Approximately 5V

PBIB2608E

Continuity should exist.

EC-836

< COMPONENT DIAGNOSIS >

[VK56DE]

P2122, P2123 APP SENSOR

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

OK or NG

>> GO TO 5.

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

CHECK APP SENSOR

EC-836, "Component Inspection"

OK or NG

>> GO TO 7.

>> GO TO 6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace the accelerator pedal assembly.

EC-497, "Accelerator Pedal Released Position Learning"

>> INSPECTION END

CHECK INTERMITTENT INCIDENT

GI-51, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000001537968

ACCELERATOR PEDAL POSITION SENSOR

Reconnect all harness connectors disconnected.

Turn ignition switch ON.

Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.

If NG, replace accelerator pedal assembly and go to next step.

EC-497, "Accelerator Pedal Released Position Learning"