Infiniti EX35. Manual - part 608

 

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Infiniti EX35. Manual - part 608

 

 

EC-174

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0117, P0118 ECT SENSOR

Component Inspection

INFOID:0000000003133335

1.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect engine coolant temperature sensor harness connector.

3.

Remove engine coolant temperature sensor.

4.

Check resistance between engine coolant temperature sensor
terminals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine coolant temperature sensor.

Terminals

Condition

Resistance (k

Ω

)

1 and 2

Temperature [

°

C (

°

F)]

20 (68)

2.37 - 2.63

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

JMBIA0080ZZ

P0122, P0123, P0227, P0228 TP SENSOR

EC-175

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0122, P0123, P0227, P0228 TP SENSOR

Description

INFOID:0000000003133336

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement. 
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed 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.

DTC Logic

INFOID:0000000003133337

DTC DETECTION LOGIC

NOTE:
If DTC P0122, P0123, P0227 or P0228 is displayed with DTC P0643, first perform the trouble diagnosis
for DTC P0643. Refer to 

EC-339, "DTC 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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V 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-175, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003133338

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0122

Throttle position sensor 
2 (bank 1) circuit low in-
put

An excessively low voltage from the TP sensor 
2 is sent to ECM.

• Harness or connectors

(TP sensor 2 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 2)

P0123

Throttle position sensor 
2 (bank 1) circuit high in-
put

An excessively high voltage from the TP sensor 
2 is sent to ECM.

P0227

Throttle position sensor 
2 (bank 2) circuit low in-
put

An excessively low voltage from the TP sensor 
2 is sent to ECM.

P0228

Throttle position sensor 
2 (bank 2) circuit high in-
put

An excessively high voltage from the TP sensor 
2 is sent to ECM.

EC-176

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0122, P0123, P0227, P0228 TP SENSOR

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-177, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

DTC

Electric throttle control actuator

Ground

Voltage (V)

Bank

Connector

Terminal

P0122, P0123

1

F6

6

Ground

Approx. 5

P0227, P0228

2

F27

1

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0122, P0123

1

F6

3

F101

40

Existed

P0227, P0228

2

F27

4

48

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0122, P0123

1

F6

5

F101

34

Existed

P0227, P0228

2

F27

3

35

P0122, P0123, P0227, P0228 TP SENSOR

EC-177

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-177, "Special Repair Requirement"

.

>> INSPECTION END

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003133339

1.

CHECK THROTTLE POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform 

EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

4.

Turn ignition switch ON.

5.

Set selector lever to D position. 

6.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-177, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000003133340

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-18, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

ECM

Condition

Voltage (V)

Connector

+

–

Terminal

Terminal

F101

30

[TP sensor 1 (bank 1)]

40

Accelerator pedal : Fully released

More than 0.36

Accelerator pedal : Fully depressed

Less than 4.75

31

[TP sensor 1 (bank 2)]

48

Accelerator pedal : Fully released

More than 0.36

Accelerator pedal : Fully depressed

Less than 4.75

34

[TP sensor 2 (bank 1)]

40

Accelerator pedal : Fully released

Less than 4.75

Accelerator pedal : Fully depressed

More than 0.36

35

[TP sensor 2 (bank 2)]

48

Accelerator pedal : Fully released

Less than 4.75

Accelerator pedal : Fully depressed

More than 0.36

 

 

 

 

 

 

 

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