Infiniti F50. Manual - part 497

 

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Infiniti F50. Manual - part 497

 

 

DTC P2138 APP SENSOR

EC-629

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Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

EBS00MNN

1. 

RETIGHTEN GROUND SCREWS

1.

Turn ignition switch “OFF”.

2.

Loosen and retighten engine ground screws.

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

87

L/W

Accelerator pedal position 
sensor 1

[Ignition switch “ON”]

Engine stopped

Selector lever: “D”

Accelerator pedal is released

More than 0.36V

[Ignition switch “ON”]

Engine stopped

Selector lever: “D”

Accelerator pedal is fully depressed

Less than 4.75V

89

B

Sensor ground

[Engine is running]

Warm-up condition

Idle speed

Approximately 0V

94

G

Accelerator pedal position 
sensor 2 power supply

[Ignition switch “ON”]

Approximately 2.5V

100

BR

Accelerator pedal position 
sensor 2 ground

[Ignition switch “ON”]

Approximately 0V

103

L

Sensor power supply

[Ignition switch “ON”]

Approximately 5V

117

B/R

Accelerator pedal position 
sensor 2

[Ignition switch “ON”]

Engine stopped

Selector lever: “D”

Accelerator pedal is released

More than 0.18V

[Ignition switch “ON”]

Engine stopped

Selector lever: “D”

Accelerator pedal is fully depressed

Less than 2.37V

PBIB0011E

EC-630

DTC P2138 APP SENSOR

2. 

CHECK APP SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch “ON”.

3.

Check voltage between electric throttle control actuator termi-
nals 7, 10 and ground with CONSULT-II 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 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch “OFF”.

2.

Check harness continuity between electric throttle control actuator terminals 9, 12 and ECM terminal 89,
100.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

Joint connector-30

Harness for open or short between ECM and electric throttle control actuator 

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

PBIB0015E

Electric throttle control actuator terminal

Voltage (V)

7

Approximately 5

10

Approximately 2.5

PBIB0084E

Continuity should exist.

DTC P2138 APP SENSOR

EC-631

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5. 

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 87 and electric throttle control actuator terminal 8, ECM
terminal 117 and electric throttle control actuator terminal 11.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 6.

NG

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

6. 

CHECK APP SENSOR

Refer to 

EC-632, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-46, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-46, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-46, "Idle Air Volume Learning"

 .

>> INSPECTION END

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-632

DTC P2138 APP SENSOR

Component Inspection

EBS00MNO

ACCELERATOR PEDAL POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Turn ignition switch “ON”.

3.

Check voltage between ECM terminals 87 (APP sensor 1 sig-
nal), 117 (APP sensor 2 signal) and engine ground under the fol-
lowing conditions.

4.

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

5.

Perform 

EC-46, "Accelerator Pedal Released Position Learning"

 .

6.

Perform 

EC-46, "Throttle Valve Closed Position Learning"

 .

7.

Perform 

EC-46, "Idle Air Volume Learning"

 .

Removal and Installation

EBS00MNP

ACCELERATOR PEDAL

Refer to 

ACC-2, "ACCELERATOR CONTROL SYSTEM"

 .

Terminal

Accelerator pedal

Voltage

87
 (Accelerator pedal position 
sensor 1)

Fully released

More than 0.36V

Fully depressed

Less than 4.75V

117
(Accelerator pedal position 
sensor 2)

Fully released

More than 0.18V

Fully depressed

Less than 2.37V

PBIB0184E

 

 

 

 

 

 

 

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