Nissan Frontier D22. Manual — part 564
DTC P0122, P0123 TP SENSOR
EC-1359
[VG33ER]
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EC
DTC P0122, P0123 TP SENSOR
PFP:16119
Component Description
UBS00DUA
NOTE:
If DTC P0122, P0123 is displayed with DTC P0510, first perform the trouble diagnosis for DTC P0510.
Refer to
The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiome-
ter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addi-
tion, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the
ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sen-
sor. This sensor controls engine operation such as fuel cut. On the other hand, the “Wide open and closed
throttle position switch”, which is built into the throttle position sensor unit, is not used for engine control.
CONSULT-II Reference Value in Data Monitor Mode
UBS00DUB
Specification data are reference values.
On Board Diagnosis Logic
UBS00DUC
These self-diagnosis have one trip detection logic.
SEC299C
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL POS SEN
●
Engine: After warming up, idle the
engine
Throttle valve: fully closed
0.15 - 0.85V
●
Engine: After warming up
●
Ignition switch: ON
(Engine stopped)
Throttle valve: fully opened
3.5 - 4.7V
ABSOL TH·P/S
●
Engine: After warming up
●
Ignition switch: ON
●
More than -40.0 kpa (-300 mmHg,
-11.81 inHg) of vacuum is applied
to the throttle opener with a hand
vacuum pump.
Throttle valve: fully closed
0.0%
●
Engine: After warming up
●
Ignition switch: ON
(Engine stopped)
Throttle valve: fully opened
Approx. 80%
EC-1360
[VG33ER]
DTC P0122, P0123 TP SENSOR
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
UBS00DUD
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
●
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
●
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Start engine and maintain the following conditions for at least 5
consecutive seconds.
3.
If DTC is detected, go to
EC-1362, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II”.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0122
Throttle position sensor
circuit low input
An excessively low voltage from the sensor is
sent to ECM
●
Harness or connectors
(The TP sensor circuit is open or
shorted.)
●
TP sensor
P0123
Throttle position sensor
circuit high input
An excessively high voltage from the sensor is
sent to ECM
Detected items
Engine operating condition in fail-safe mode
Throttle position sensor
circuit
Throttle position will be determined based on the injected fuel amount and the engine speed.
Therefore, acceleration will be poor.
Condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
Vehicle speed
More than 5 km/h (3 MPH)
Selector lever
Suitable position except P or N position
SEF065Y
DTC P0122, P0123 TP SENSOR
EC-1361
[VG33ER]
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Wiring Diagram
UBS00DUE
BBWA0473E
EC-1362
[VG33ER]
DTC P0122, P0123 TP SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than the ECM terminals, such as the ground.
Diagnostic Procedure
UBS00DUF
1.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch OFF.
2.
Loosen and retighten engine ground screws.
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
23
L
Throttle position sensor
[Engine is running]
●
Warm-up condition
●
More than -40.0 kpa (-300 mmHg, -11.81 inHg)
of vacuum is applied to the throttle opener with
a hand vacuum pump
●
Accelerator pedal is fully released
0.15 - 0.85V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal is fully depressed
3.5 - 4.7V
42
B/W
Sensor power supply
[Ignition switch: ON]
Approximately 5V
43
BR
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
BBIA0418E
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