Infiniti FX35, FX50 (S51). Manual — part 884
P2122, P2123 APP SENSOR
EC-1077
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
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NO
>> GO TO 2.
2.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
EC-1077, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000005237578
1.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to
EC-581, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
>> GO TO 2.
2.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-581, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
.
>> GO TO 3.
3.
PERFORM IDLE AIR VOLUME LEARNING
EC-582, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
EC-1078
< DTC/CIRCUIT DIAGNOSIS >
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P2127, P2128 APP SENSOR
P2127, P2128 APP SENSOR
Description
INFOID:0000000005237579
The accelerator pedal position sensor is installed on the accelerator
pedal assembly. The sensor detects the accelerator position and
sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for engine operations such as fuel cut.
DTC Logic
INFOID:0000000005237580
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V 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-1079, "Diagnosis Procedure"
NO
>> INSPECTION END
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2127
Accelerator pedal position
sensor 2 circuit low input
An excessively low voltage from
the APP sensor 2 is sent to ECM.
• Harness or connectors
(Accelerator pedal position sensor 2 circuit is open or
shorted.)
(Battery current sensor circuit is shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Crankshaft position sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is
shorted.)
[EVT control position sensor (bank 1) circuit is short-
ed.]
(Manifold absolute pressure sensor circuit is short-
ed.)
• Accelerator pedal position sensor (APP sensor 2)
• Battery current sensor
• Camshaft position sensor (bank 1)
• Crankshaft position sensor
• EVAP control system pressure sensor
• Exhaust valve timing control position sensor (bank 1)
• Manifold absolute pressure sensor
P2128
Accelerator pedal position
sensor 2 circuit high input
An excessively high voltage from
the APP sensor 2 is sent to ECM.
P2127, P2128 APP SENSOR
EC-1079
< DTC/CIRCUIT DIAGNOSIS >
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Diagnosis Procedure
INFOID:0000000005237581
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I
1.
Disconnect accelerator pedal position (APP) sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 3.
3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between APP sensor harness connector and ECM harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M6, E106
• Harness for open or short between ECM and APP sensor
>> Repair open circuit.
5.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
APP sensor
Ground
Voltage (V)
Connector
Terminal
E112
(Without ICC)
6
Ground
Approx. 5
E116
(With ICC)
3
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E112
(Without ICC)
6
M160
99
Existed
E116
(With ICC)
3
EC-1080
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
P2127, P2128 APP SENSOR
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair short to ground or short to power in harness or connectors.
6.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (Refer to
EC-876, "Component Inspection"
• Camshaft position sensor (bank 1) (Refer to
EC-881, "Component Inspection"
• Exhaust valve timing control position sensor (bank 1) (Refer to
EC-978, "Component Inspection"
.)
• EVAP control system pressure sensor (Refer to
EC-917, "Component Inspection"
.)
• Manifold absolute pressure sensor (Refer to
EC-785, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace malfunctioning component.
7.
CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between APP sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M6, E106
• Harness for open or short between ECM and APP sensor
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between APP sensor harness connector and ECM harness connector.
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F111
87
Crankshaft position sensor
F2
1
91
Camshaft position sensor (bank 1)
F84
1
EVT control position sensor (bank 1)
F59
1
95
Battery current sensor
E21
1
EVAP control system pressure sensor
B252
3
Manifold absolute pressure sensor
F65
1
M160
99
APP sensor (Without ICC)
E112
6
APP sensor (with ICC)
E116
3
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E112
(Without ICC)
2
M160
115
Existed
E116
(With ICC)
2
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