Nissan Sentra. Manual — part 434
EC-432
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P2122, P2123 APP SENSOR
P2122, P2123 APP SENSOR
DTC Logic
INFOID:0000000009758689
DTC DETECTION LOGIC
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
.
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:0000000009758690
1.
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 3.
NO
>> GO TO 2.
DTC No.
CONSULT screen terms
(Trouble diagnosis con-
tent)
DTC detecting condition
Possible cause
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.
• Harness or connectors
(APP sensor 1 circuit is open or shorted.)
• Accelerator pedal position sensor (APP
sensor 1)
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.
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
E12
4
Ground
5.0 V
P2122, P2123 APP SENSOR
EC-433
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
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.
3.
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 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK APP SENSOR 1 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?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK APP SENSOR
Check APP sensor. Refer to
EC-433, "Component Inspection (APP Sensor)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> Replace accelerator pedal assembly. Refer to
ACC-3, "Removal and Installation"
Component Inspection (APP Sensor)
INFOID:0000000009758691
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Turn ignition switch ON.
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E12
4
E16
122
Existed
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E12
2
E16
127
Existed
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E12
3
E16
126
Existed
EC-434
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P2122, P2123 APP SENSOR
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-3, "Removal and Installation"
ECM
Condition
Voltage
Connector
+
−
Terminal
E16
126
127
Accelerator pedal
Fully released
0.6 - 0.9 V
Fully depressed
3.9 - 4.7 V
119
120
Fully released
0.3 - 0.6 V
Fully depressed
1.95 - 2.4 V
P2127, P2128 APP SENSOR
EC-435
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P2127, P2128 APP SENSOR
DTC Logic
INFOID:0000000009758692
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
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009758693
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.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Check sensor power supply 2 circuit. Refer to
.
DTC No.
CONSULT screen terms
(Trouble diagnosis con-
tent)
DTC detecting condition
Possible cause
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.
• Harness or connectors
(APP sensor 2 circuit is open or shorted.)
• Accelerator pedal position sensor
(APP sensor 2)
• Sensor power supply 2 circuit
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
E12
5
Ground
5.0 V
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