Infiniti FX35 / FX45. Manual - part 586

DTC P2122, P2123 APP SENSOR

EC-1105

< SERVICE INFORMATION >

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DTC Confirmation Procedure

INFOID:0000000001327003

NOTE:
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 8V at idle.
1.

Start engine and let it idle for 1 second.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-1107, "Diagnosis Procedure"

.

EC-1106

< SERVICE INFORMATION >

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DTC P2122, P2123 APP SENSOR

Wiring Diagram

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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.

TBWM1354E

DTC P2122, P2123 APP SENSOR

EC-1107

< SERVICE INFORMATION >

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Diagnosis Procedure

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1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body.
Refer to 

EC-723, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

TER-

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NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

82

B/W

Sensor ground
(APP sensor 1 / ICC steering 
switch / ASCD steering 
switch)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

83

G/OR

Sensor ground
(APP sensor 2)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

90

L/B

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5V

91

G

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

98

Y/R

Accelerator pedal position 
sensor 2

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released

0.15 - 0.60V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed

1.95 - 2.40V

106

OR

Accelerator pedal position 
sensor 1

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released

0.5 - 1.0V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed

3.9 - 4.7V

PBIB2195E

EC-1108

< SERVICE INFORMATION >

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DTC P2122, P2123 APP SENSOR

1.

Disconnect accelerator pedal position (APP) sensor harness
connector.

2.

Turn ignition switch ON.

3.

Check voltage between APP sensor terminal 6 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and accelerator pedal position sensor

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

4.

CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between APP sensor terminal 3 and ECM terminal 82.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and accelerator pedal position sensor

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

6.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 106 and APP sensor terminal 5.
Refer to Wiring Diagram.

2.

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

OK or NG

PBIB1548E

Voltage: Approximately 5V

PBIB0914E

Continuity should exist.

Continuity should exist.