Nissan Frontier. Instruction — part 464
P2135 TP SENSOR
EC-427
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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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 APP SENSOR
EC-424, "Component Inspection"
OK or NG
OK
>> GO TO 11.
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 THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 36.
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 THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 37 and electric throttle control actuator terminal 1, ECM
terminal 38 and electric throttle control actuator terminal 3.
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 THROTTLE POSITION SENSOR
EC-428, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 10.
10.
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
11.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
Continuity should exist.
Continuity should exist.
EC-428
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2135 TP SENSOR
>> INSPECTION END
Component Inspection
INFOID:0000000009481136
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform
EC-123, "Throttle Valve Closed Position Learning"
3. Turn ignition switch ON.
4. Set shift lever to D (A/T) or 1st (M/T) position.
5. Check voltage between ECM terminals 37 (TP sensor 1 signal), 38 (TP sensor 2 signal) and ground under
the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform
EC-123, "Throttle Valve Closed Position Learning"
8. Perform
EC-124, "Idle Air Volume Learning"
.
Terminal
Accelerator pedal
Voltage
37
(Throttle position sensor 1)
Fully released
More than 0.36V
Fully depressed
Less than 4.75V
38
(Throttle position sensor 2)
Fully released
Less than 4.75V
Fully depressed
More than 0.36V
P2138 APP SENSOR
EC-429
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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P2138 APP SENSOR
Component Description
INFOID:0000000009481137
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:0000000009481138
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, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
INFOID:0000000009481139
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
P2138
2138
Accelerator pedal position
sensor circuit range/perfor-
mance problem
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.)
(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.
EC-430
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P2138 APP SENSOR
Diagnosis Procedure
INFOID:0000000009481140
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 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 1 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 4.
4.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
BBIA0614E
BBIA0592E
Voltage: Approximately 5V
PBIB2608E
Voltage: Approximately 5V
PBIB2611E
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