Nissan Frontier. Instruction — part 462
P2122, P2123 APP SENSOR
EC-419
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Diagnosis Procedure
INFOID:0000000009481125
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 2 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit, short to ground or short to power in
harness or connectors.
3.
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 4 and ECM terminal 84.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK APP SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
BBIA0614E
BBIA0592E
Voltage: Approximately 5V
PBIB2608E
Continuity should exist.
EC-420
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2122, P2123 APP SENSOR
1. Check harness continuity between ECM terminal 81 and APP sensor terminal 3.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK APP SENSOR
EC-420, "Component Inspection"
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. Refer to
2. Perform
EC-123, "Accelerator Pedal Released Position Learning"
3. Perform
EC-123, "Throttle Valve Closed Position Learning"
4. Perform
EC-124, "Idle Air Volume Learning"
.
>> INSPECTION END
7.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009481126
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 81 (APP sensor 1 signal), 82 (APP sensor 2 signal) and ground
under the following conditions.
4. If NG, replace accelerator pedal assembly and go to the next step.
5. Perform
EC-123, "Accelerator Pedal Released Position Learning"
6. Perform
EC-123, "Throttle Valve Closed Position Learning"
7. Perform
EC-124, "Idle Air Volume Learning"
.
Continuity should exist.
Terminal
Accelerator pedal
Voltage
81
(Accelerator pedal position
sensor 1)
Fully released
0.6 - 0.95V
Fully depressed
Less than 4.75V
82
(Accelerator pedal position
sensor 2)
Fully released
0.3 - 0.45V
Fully depressed
Less than 2.4V
P2127, P2128 APP SENSOR
EC-421
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P2127, P2128 APP SENSOR
Component Description
INFOID:0000000009481127
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.
On Board Diagnosis Logic
INFOID:0000000009481128
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
INFOID:0000000009481129
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.
WITH CONSULT
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT” above.
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2127
2127
Accelerator pedal position
sensor 2 circuit low input
An excessively low voltage from the APP
sensor 2 is sent to ECM.
• Harness or connectors
(The APP sensor 2 circuit is open or
shorted.)
(TP sensor circuit is shorted.)
• Accelerator pedal position sensor
(Accelerator pedal position sensor 2)
• Electric throttle control actuator
(TP sensor 1 and 2)
P2128
2128
Accelerator pedal position
sensor 2 circuit high input
An excessively high voltage from the APP
sensor 2 is sent to ECM.
Engine operating condition in fail-safe mode
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.
EC-422
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2127, P2128 APP SENSOR
Diagnosis Procedure
INFOID:0000000009481130
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 1 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 3.
3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 1 and ECM terminal 87.
Refer to Wiring Diagram.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit.
4.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
BBIA0614E
BBIA0592E
Voltage: Approximately 5V
PBIB2611E
Continuity should exist.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст