Nissan Titan. Manual - part 283

P2118 THROTTLE CONTROL MOTOR

EC-433

< DTC/CIRCUIT DIAGNOSIS >

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P2118 THROTTLE CONTROL MOTOR

Component Description

INFOID:0000000009886876

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:0000000009886877

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:0000000009886878

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-433, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009886879

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body.

Refer to 

EC-154, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> 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.

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EC-434

< DTC/CIRCUIT DIAGNOSIS >

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P2118 THROTTLE CONTROL MOTOR

2.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1. Disconnect electric throttle control actuator (1) harness connec-

tor.

-

Illustration shows the view with intake air duct removed.

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-434, "Component Inspection"

.

OK or NG

 OK

>> GO TO 4.

NG

>> GO TO 5.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "How to Check Terminal"

 and 

GI-42, "Intermittent Incident"

.

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-128, "Throttle Valve Closed Position Learning"

.

3. Perform 

EC-129, "Idle Air Volume Learning"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009886880

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-128, "Throttle Valve Closed Position Learning"

.

5. Perform 

EC-129, "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

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Resistance: Approximately 1 - 15 

Ω [at 25 °C (77°F)]

PBIB2066E

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-435

< DTC/CIRCUIT DIAGNOSIS >

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P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Component Description

INFOID:0000000009886881

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:0000000009886882

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:0000000009886883

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 swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich 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 or N 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 or N 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-436, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION C

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

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

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-436

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

3. Shift selector lever to P position.

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

5. Check DTC.

6. If DTC is detected, go to 

EC-436, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009886884

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, and then perform throttle valve

closed position learning. Refer to 

EC-128, "Throttle

Valve Closed Position Learning"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.

2. Perform 

EC-128, "Throttle Valve Closed Position Learning"

.

3. Perform 

EC-129, "Idle Air Volume Learning"

.

>> INSPECTION END

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