Nissan Frontier D22. Manual — part 265
DTC P0121 TP SENSOR
EC-163
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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 ECM terminals, such as the ground.
Diagnostic Procedure
UBS00D35
1.
INSPECTION START
Which malfunction A or B is duplicated?
Type A or B
Type A >> GO TO 4.
Type B >> GO TO 2.
2.
ADJUST THROTTLE POSITION SENSOR
1.
Check the following items. Refer to
>> GO TO 3.
3.
CHECK INTAKE SYSTEM
Check the following for connection.
●
Air duct
●
Air cleaner
●
Vacuum hoses
●
Intake air passage between air duct to intake manifold collector
OK or NG
OK
>> GO TO 4.
NG
>> Reconnect the parts.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
23
L
Throttle position sensor
[Ignition switch: ON]
●
Warm-up condition
●
Accelerator pedal is fully released
0.2 - 0.8V
[Ignition switch: ON]
●
Accelerator pedal is fully depressed
3.5 - 4.5V
42
BR
Sensor power supply
[Ignition switch: ON]
Approximately 5V
43
B/W
Sensor ground
[Engine is running]
●
Idle speed
Approximately 0V
MALFUNCTION
Type
A
A
B
B
Items
Specifications
Ignition timing
20
° ± 2° BTDC
Base idle speed
750
± 50 rpm (in P or N position)
Closed throttle position switch idle position adjustment
Feeler gauge thickness and switch condition
0.1 mm (0.004 in): ON
0.3 mm (0.012 in): OFF
Target idle speed
800
± 50 rpm (in P or N position)
EC-164
[KA24DE]
DTC P0121 TP SENSOR
4.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch OFF.
2.
Loosen and retighten engine ground screws.
>> GO TO 5.
5.
CHECK POWER SUPPLY
1.
Disconnect throttle position sensor harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between terminal 1 and ground with CONSULT-II
or tester.
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connectors.
6.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check harness continuity between throttle position sensor terminal 3 and engine ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and throttle position sensor.
>> Repair open circuit or short to power in harness or connectors.
BBIA0431E
SEF265S
Voltage
: Approximately 5V
SEF564P
Continuity should exist.
DTC P0121 TP SENSOR
EC-165
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
8.
CHECK INPUT SIGNAL CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 23 and terminal 2.
Refer to Wiring Diagram.
3.
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 THROTTLE POSITION SENSOR
Refer to
EC-166, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace throttle position sensor. To adjust it, perform
10.
CHECK MASS AIR FLOW SENSOR
Refer to
EC-166, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace mass air flow sensor.
11.
CHECK CAMSHAFT POSITION SENSOR
Refer to
EC-166, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace distributor assembly with camshaft position sensor.
12.
CHECK FUEL INJECTOR
Refer to
EC-166, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace fuel injector.
13.
CHECK INTERMITTENT INCIDENT
Perform
EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
Continuity should exist.
EC-166
[KA24DE]
DTC P0121 TP SENSOR
Component Inspection
UBS00D36
THROTTLE POSITION SENSOR
With CONSULT-II
1.
Reconnect all harness connectors disconnected.
2.
Start engine and warm it up to normal operating temperature.
3.
Stop engine and turn ignition switch ON.
4.
Select “DATA MONITOR” mode with CONSULT-II.
5.
Check voltage of “THRTL POS SEN” under the following condi-
tions.
NOTE:
Voltage measurement must be made with throttle position
sensor installed in vehicle.
If NG, adjust closed throttle position switch. Refer to
With GST
1.
Reconnect all harness connectors disconnected.
2.
Start engine and warm it up to normal operating temperature.
3.
Stop engine and turn ignition switch ON.
4.
Check voltage between ECM terminal 23 (Throttle position sen-
sor signal) and ground under the following conditions.
NOTE:
Voltage measurement must be made with throttle position
sensor installed in vehicle.
If NG, adjust closed throttle position switch. Refer to
MASS AIR FLOW SENSOR
1.
Turn ignition switch ON.
2.
Start engine and warm it up to normal operating temperature.
3.
Check voltage between ECM terminal 54 (mass air flow sensor
signal) and ground.
*: Check for linear voltage rise in response to increases to about 4,000 rpm in
engine speed.
4.
If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it
again. Repeat above check.
Throttle valve conditions
Voltage [V]
Completely closed
0.2 - 0.8 (a)
Partially open
Between (a) and (b)
Completely open
3.5 - 4.5 (b)
SEF179Y
Throttle valve conditions
Voltage [V]
Completely closed
0.2 - 0.8 (a)
Partially open
Between (a) and (b)
Completely open
3.5 - 4.5 (b)
SEF767W
Conditions
Voltage [V]
Ignition switch ON (Engine stopped)
Less than 1.0
Idle (Engine is warmed-up to normal operat-
ing temperature)
0.9 - 1.8
2,500 rpm (Engine is warmed-up to normal
operating temperature)
1.9 - 2.3
Idle to about 4,000 rpm*
1.3 - 1.7 to Approx. 3.0
SEF326V
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст