Nissan Frontier D22. Instruction — part 266
DTC P0121 TP SENSOR
EC-167
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
If NG, remove mass air flow sensor from air duct. Check hot wire
for damage or dust.
FUEL INJECTOR
1.
Disconnect injector harness connector.
2.
Check resistance between terminals as shown in the figure.
SEF893J
Resistance
: 7.3 - 9.9
Ω [at 25°C (77°F)]
SEF273W
EC-168
[KA24DE]
DTC P0122, P0123 TP SENSOR
DTC P0122, P0123 TP SENSOR
PFP:16119
Component Description
UBS00D37
NOTE:
If DTC, P0122 or P0123 is displayed with DTC P0510, first perform trouble diagnosis for DTC P0510,
The throttle position sensor responds to the accelerator pedal movement. This sensor is a type 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
UBS00D38
Specification data are reference values.
On Board Diagnosis Logic
UBS00D39
These self-diagnoses have the one trip detection logic.
SEF105S
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL POS SEN
●
Ignition switch: ON
(Engine stopped)
●
Engine: After warming up
Throttle valve: Fully closed
0.2 - 0.8V
Throttle valve: Fully opened
3.5 - 4.5V
ABSOL TH·P/S
●
Ignition switch: ON
(Engine stopped)
●
Engine: After warming up
Throttle valve: Fully closed
0.0%
Throttle valve: Fully opened
Approx. 80%
DTC No.
Trouble diagnosis name
DTC Detecting Condition
Check Items (Possible Cause)
P0122
Throttle position sensor
circuit low input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Throttle position sensor
P0123
Throttle position sensor
circuit high input
An excessively high voltage from the sensor is
sent to ECM.
DTC P0122, P0123 TP SENSOR
EC-169
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
UBS00D3A
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.
WITH CONSULT-II
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.
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-171, "Diagnostic Procedure"
WITH GST
Follow the procedure “WITH CONSULT-II”.
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
VHCL SPEED SE
More than 4 km/h (2 MPH)
Selector lever
Suitable position except P or N position
SEF065Y
EC-170
[KA24DE]
DTC P0122, P0123 TP SENSOR
Wiring Diagram
UBS00D3B
BBWA0547E
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