Infiniti Q45. Manual - part 501

 

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Infiniti Q45. Manual - part 501

 

 

DTC P2118 THROTTLE CONTROL MOTOR

EC-643

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EC

2. 

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

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-643, "Component Inspection"

 .

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 5.

4. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR 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-78, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-78, "Idle Air Volume Learning"

 .

>> INSPECTION END

Component Inspection

NBS00207

THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Check resistance between terminals 3 and 6.

3.

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

4.

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

5.

Perform 

EC-78, "Idle Air Volume Learning"

 .

Electric throttle control 

actuator terminal

ECM terminal

Continuity

3

5

Should not exist

4

Should exist

6

5

Should exist

4

Should not exist

PBIB2420E

Resistance: Approximately 1 - 15 

 [at 25 

°

C (77

°

F)]

PBIB0095E

EC-644

DTC P2118 THROTTLE CONTROL MOTOR

Removal and Installation

NBS00208

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-19, "INTAKE MANIFOLD"

 .

DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-645

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DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

PFP:16119

Component Description

NBS001ZK

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

NBS001ZL

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

NBS001ZM

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.

PROCEDURE FOR MALFUNCTION A AND B

 With CONSULT-II

1.

Turn ignition switch ON and wait at least 1 second.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

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

4.

Shift selector lever to P position.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Turn ignition switch ON and wait at least 1 second.

7.

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

8.

Shift selector lever to P position.

9.

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

10. If DTC is detected, go to 

EC-646, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II” above.

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.

SEF058Y

EC-646

DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

PROCEDURE FOR MALFUNCTION C

 With CONSULT-II

1.

Turn ignition switch ON and wait at least 1 second.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

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

4.

Shift selector lever to N, P position.

5.

Start engine and let it idle for 3 seconds.

6.

If DTC is detected, go to 

EC-646, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II” above.

Diagnostic Procedure

NBS001ZN

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-78, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-78, "Idle Air Volume Learning"

 .

>> INSPECTION END

SEF058Y

PBIB2439E

 

 

 

 

 

 

 

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