Nissan Frontier. Instruction — part 463
P2127, P2128 APP SENSOR
EC-423
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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EC
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OK or NG
OK
>> GO TO 5.
NG
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK THROTTLE POSITION SENSOR
EC-428, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 6.
6.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator. Refer to
2. Perform
EC-123, "Throttle Valve Closed Position Learning"
3. Perform
EC-124, "Idle Air Volume Learning"
.
>> INSPECTION END
7.
CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 5 and ECM terminal 100.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 82 and APP sensor terminal 6.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK APP SENSOR
EC-424, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 10.
10.
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"
.
ECM terminal
Sensor terminal
87
APP sensor terminal 1
47
Electric throttle control actuator terminal 2
Continuity should exist.
Continuity should exist.
EC-424
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2127, P2128 APP SENSOR
>> INSPECTION END
11.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009481131
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. Refer to
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"
.
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
P2135 TP SENSOR
EC-425
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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EC
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P2135 TP SENSOR
Component Description
INFOID:0000000009481132
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
On Board Diagnosis Logic
INFOID:0000000009481133
This self-diagnosis has 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:0000000009481134
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.
Diagnosis Procedure
INFOID:0000000009481135
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
PBIB0145E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2135
2135
Throttle position sensor cir-
cuit range/performance
problem
Rationally incorrect voltage is sent to ECM
compared with the signals from TP sensor 1
and TP sensor 2.
• Harness or connector
(The TP sensor 1 and 2 circuit is open or
shorted.)
(APP sensor 2 circuit is shorted.)
• Electric throttle control actuator
(TP sensor 1 and 2)
• Accelerator pedal position sensor
(APP sensor 2)
Engine operation 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-426
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2135 TP SENSOR
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 THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check voltage between electric throttle control actuator terminal
2 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 3.
3.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 47.
Refer to Wiring Diagram.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit.
4.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
BBIA0614E
BBIA0616E
Voltage: Approximately 5V
PBIB2604E
Continuity should exist.
ECM terminal
Sensor terminal
47
Electric throttle control actuator terminal 2
87
APP sensor terminal 1
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