Nissan Frontier D22. Manual — part 565
DTC P0122, P0123 TP SENSOR
EC-1363
[VG33ER]
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EC
2.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect throttle position sensor harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between sensor terminal 3 and ground with CON-
SULT-II 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 THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between throttle position sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM and throttle position sensor.
>> Repair open circuit or short to power in harness or connectors.
5.
CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 23 and throttle position sensor terminal 2.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
AEC638A
Voltage: Approximately 5V
SEF630W
Continuity should exist.
Continuity should exist.
EC-1364
[VG33ER]
DTC P0122, P0123 TP SENSOR
6.
CHECK THROTTLE POSITION SENSOR
EC-1366, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
ADJUST CLOSED THROTTLE POSITION SWITCH
Adjust closed throttle position switch. Refer to
OK or NG
OK
>> GO TO 8.
NG
>> Replace throttle position sensor. To adjust it, perform
.
8.
CHECK MASS AIR FLOW SENSOR
EC-1333, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace mass air flow sensor.
Items
Specifications
Ignitions timing
10
° ± 5° BTDC
Base idle speed
700
± 50 rpm (in P or N position)
Closed throttle position switch idle
position adjustment
Feeler gauge thickness and switch
condition
0.3 mm (0.012 in): ON
0.4 mm (0.016 in): OFF
Target idle speed
750
± 50 rpm (in P or N position)
DTC P0122, P0123 TP SENSOR
EC-1365
[VG33ER]
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EC
9.
CHECK CAMSHAFT POSITION SENSOR
1.
Install any parts removed.
2.
Start engine.
3.
Check voltage between ECM terminals 44, 48 and ground, ECM
terminal 49 and ground with DC range.
<Terminal 44 or 48 and engine ground>
<Terminal 49 and engine ground>
OK or NG
OK
>> GO TO 10.
NG
>> Replace distributor assembly with camshaft position sensor.
10.
CHECK FUEL INJECTOR
1.
Disconnect injector harness connector.
2.
Check resistance between terminals as shown in the figure.
OK or NG
OK
>> GO TO 11.
NG
>> Replace fuel injector.
11.
CHECK INTERMITTENT INCIDENT
Refer to
EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
Condition
Idle
2,000 rpm
Voltage
0.3 - 0.5V
0.3 - 0.5V
Pulse sig-
nal
Condition
Idle
2,000 rpm
Voltage
Approximately 2.5V
Approximately 2.5V
Pulse sig-
nal
PBIB1424E
SEF997U
SEF998U
SEF999U
SEF001V
Resistance: 10 - 14
Ω [at 25°C (77°F)]
SEF625V
EC-1366
[VG33ER]
DTC P0122, P0123 TP SENSOR
Component Inspection
UBS00DUG
THROTTLE POSITION SENSOR
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine (ignition switch OFF).
3.
Turn ignition switch ON.
4.
Select “DATA MONITOR” mode with CONSULT-II.
5.
Check voltage of “THRTL POS SEN” under the following condi-
tions.
Voltage measurement must be made with throttle position
sensor installed in vehicle.
With GST
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine (ignition switch OFF).
3.
Turn ignition switch ON.
4.
Check voltage between ECM terminal 23 (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.
Throttle valve conditions
THRTL POS SEN
Completely closed (a)
0.15 - 0.85V
Partially open
Between (a) and (b)
Completely open (b)
3.5 - 4.7V
SEF719Y
Throttle valve conditions
Voltage [V]
Completely closed
0.15 - 0.85 (a)
Partially open
Between (a) and (b)
Completely open
3.5 - 4.7 (b)
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