Infiniti M45 (Y34). Manual — part 487

DTC P2138 APP SENSOR

EC-637

C

D

E

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G

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A

EC

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

ABS002TD

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws.
Refer to

EC-141, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

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: Fully released

More than 0.36V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

Less than 4.75V

89

B

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

94

G

Sensor power supply
(Accelerator pedal position
sensor 2)

[Ignition switch: ON]

Approximately 2.5V

100

BR

Sensor ground
(Accelerator pedal position
sensor 2)

[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: Fully released

More than 0.18V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

Less than 2.37V

PBIB1118E

EC-638

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.

Disconnect ECM harness connector.

3.

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

4.

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-639

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D

E

F

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M

A

EC

5.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

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

2.

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-640, "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-44, "Accelerator Pedal Released Position Learning"

.

3.

Perform

EC-44, "Throttle Valve Closed Position Learning"

.

4.

Perform

EC-44, "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-640

DTC P2138 APP SENSOR

Component Inspection

ABS0031F

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 ground under the following
conditions.

4.

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

5.

Perform

EC-44, "Accelerator Pedal Released Position Learning"

.

6.

Perform

EC-44, "Throttle Valve Closed Position Learning"

.

7.

Perform

EC-44, "Idle Air Volume Learning"

.

Removal and Installation

ABS002TE

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