Nissan Frontier. Manual — part 585
P2135 TP SENSOR
EC-911
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform
EC-591, "Throttle Valve Closed Position Learning"
8. Perform
EC-591, "Idle Air Volume Learning"
.
Terminal
Accelerator pedal
Voltage
22
(Throttle position sensor 1)
Fully released
More than 0.36V
Fully depressed
Less than 4.75V
23
(Throttle position sensor 2)
Fully released
Less than 4.75V
Fully depressed
More than 0.36V
EC-912
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P2138 APP SENSOR
P2138 APP SENSOR
Component Description
INFOID:0000000009481622
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:0000000009481623
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates.
DTC Confirmation Procedure
INFOID:0000000009481624
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
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 10V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to
.
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2138
2138
Accelerator pedal posi-
tion sensor circuit range/
performance
Rationally incorrect voltage is sent to ECM
compared with the signals from APP sensor 1
and APP sensor 2.
• Harness or connector
(The APP sensor 1 and 2 circuit is open
or shorted.)
(The TP sensor circuit is shorted.)
• Accelerator pedal position sensor
(APP sensor 1 and 2)
• Electric throttle control actuator
(TP sensor 1 and 2)
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.
P2138 APP SENSOR
EC-913
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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Diagnosis Procedure
INFOID:0000000009481625
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three 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 terminals 2 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 1 and ground with CONSULT or tester.
1.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 4.
4.
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 103.
Refer to wiring diagram.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit.
5.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
Voltage: Approximately 5V
BBIA0556E
Voltage: Approximately 5V
Continuity should exist.
ECM terminal
Sensor terminal
103
APP sensor terminal 1
24
Electric throttle control actuator terminal 2
EC-914
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P2138 APP SENSOR
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK THROTTLE POSITION SENSOR
EC-728, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 7.
7.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. Refer to
.
2. Perform
EC-591, "Throttle Valve Closed Position Learning"
3. Perform
EC-591, "Idle Air Volume Learning"
.
>> INSPECTION END
8.
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminals 4 and ECM terminal 100, APP sensor terminal 5
and ECM terminal 116.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 97 and APP sensor terminal 3, ECM terminal 98 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 10.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK APP SENSOR
EC-915, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. Refer to
2. Perform
EC-590, "Accelerator Pedal Released Position Learning"
3. Perform
EC-591, "Throttle Valve Closed Position Learning"
4. Perform
EC-591, "Idle Air Volume Learning"
.
>> INSPECTION END
12.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
Continuity should exist.
Continuity should exist.
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