Nissan X-Trail 32. Instruction — part 907
P2122, P2123 APP SENSOR
EC-757
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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P2122, P2123 APP SENSOR
DTC Description
INFOID:0000000010986465
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (APP sensor 1 circuit is open or shorted.)
• Accelerator pedal position sensor (APP sensor 1)
FAIL-SAFE
• The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle
position to be within +10 degrees.
• The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the
acceleration will be poor.
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
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 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010986466
1.
CHECK DTC PRIORITY
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P2122
APP SEN 1/CIRC
(Throttle/pedal position sensor/switch
″
D
″
circuit low)
An excessively low voltage from the APP sensor 1 is sent to ECM.
P2123
APP SEN 1/CIRC
(Throttle/pedal position sensor/switch
″
D
″
circuit high)
An excessively high voltage from the APP sensor 1 is sent to ECM.
EC-758
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2122, P2123 APP SENSOR
2.
CHECK APP SENSOR 1 POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect accelerator pedal position (APP) sensor harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
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.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
4.
CHECK APP SENSOR 1 GROUND CIRCUIT
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 power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT
1.
Check the continuity between APP sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
E110
4
Ground
5 V
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E110
4
E60
122
Existed
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E110
2
E60
127
Existed
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E110
3
E60
126
Existed
P2122, P2123 APP SENSOR
EC-759
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK APP SENSOR
Check the APP sensor. Refer to
EC-759, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace accelerator pedal assembly. Refer to
ACC-4, "Removal and Installation"
7.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000010986467
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 between ECM harness connector terminals as per the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace accelerator pedal assembly. Refer to
ACC-4, "Removal and Installation"
ECM
Condition
Voltage
Connector
+
−
Terminal
Sensor 1
E60
126
127
Accelerator pedal
Fully released
0.5 - 1.0 V
Fully depressed
4.2 - 4.8 V
Sensor 2
119
120
Fully released
0.25 - 0.5 V
Fully depressed
2.0 - 2.5 V
EC-760
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2127, P2128 APP SENSOR
P2127, P2128 APP SENSOR
DTC Description
INFOID:0000000010986468
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (APP sensor 2 circuit is open or shorted.)
• Accelerator pedal position sensor (APP sensor 2)
• Sensor power supply 2 circuit
FAIL-SAFE
• The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle
position to be within +10 degrees.
• The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the
acceleration will be poor.
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
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010986469
1.
CHECK APP SENSOR 2 POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect accelerator pedal position (APP) sensor harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between APP sensor harness connector and ground.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P2127
APP SEN 2/CIRC
(Throttle/pedal position sensor/switch
″
E
″
circuit low)
An excessively low voltage from the APP sensor 2 is sent to ECM.
P2128
APP SEN 2/CIRC
(Throttle/pedal position sensor/switch
″
E
″
circuit high)
An excessively high voltage from the APP sensor 2 is sent to ECM.
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
E110
5
Ground
5 V
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