Infiniti EX35. Manual — part 670
EC-422
< COMPONENT DIAGNOSIS >
[VQ35HR]
P2122, P2123 APP SENSOR
NO
>> Repair or replace ground connection.
2.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
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 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M6, E106
• 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 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 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M6, E106
• 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 the continuity between APP sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
APP sensor
Ground
Voltage (V)
Connector
Terminal
E112
5
Ground
Approx. 5
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E112
4
M107
100
Existed
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E112
3
M107
97
Existed
P2122, P2123 APP SENSOR
EC-423
< COMPONENT DIAGNOSIS >
[VQ35HR]
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EC
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P
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• Harness connectors M6, E106
• 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.
8.
CHECK APP SENSOR
EC-423, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
Go to
EC-423, "Special Repair Requirement"
.
>> INSPECTION END
10.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000003133602
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
Turn ignition switch ON.
4.
Check the voltage ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
Go to
EC-423, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000003133603
1.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to
EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"
.
>> GO TO 2.
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
M107
97 (APP sensor 1)
100
Accelerator pedal
Fully released
0.5 - 1.0
Fully depressed
4.2 - 4.8
98 (APP sensor 2)
104
Fully released
0.25 - 0.50
Fully depressed
2.0 - 2.5
EC-424
< COMPONENT DIAGNOSIS >
[VQ35HR]
P2122, P2123 APP SENSOR
2.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 3.
3.
PERFORM IDLE AIR VOLUME LEARNING
EC-18, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
.
>> END
P2127, P2128 APP SENSOR
EC-425
< COMPONENT DIAGNOSIS >
[VQ35HR]
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P2127, P2128 APP SENSOR
Description
INFOID:0000000003133604
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed 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 the engine oper-
ation such as fuel cut.
DTC Logic
INFOID:0000000003133605
DTC DETECTION 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?
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2127
Accelerator pedal posi-
tion sensor 2 circuit low
input
An excessively low voltage from the APP sen-
sor 2 is sent to ECM.
• Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
[CMP sensor (PHASE) (bank 2) circuit is
shorted.]
[EVT control position sensor (bank 2) cir-
cuit is shorted.]
(Battery current sensor circuit is shorted.)
(EVAP control system pressure sensor
circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• Accelerator pedal position sensor (APP
sensor 2)
• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
(bank 2)
• Exhaust valve timing control position
sensor (bank 2)
• Battery current sensor
• EVAP control system pressure sensor
• Refrigerant pressure sensor
P2128
Accelerator pedal posi-
tion sensor 2 circuit high
input
An excessively high voltage from the APP sen-
sor 2 is sent to ECM.
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