2001 NISSAN PICK-UP sensor

Diagnostic ProcedureNEEC0085
1 INSPECTION START
Which malfunction A or B is duplicated?
MTBL1307
TypeAorB
Type A©GO TO 4.
Type B©GO TO 2.
2 ADJUST THROTTLE POSITION SENSOR
1. Check the following items. Refer to ªBasic Inspectionº, EC-3086.
MTBL1315
OK or NG
OK©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.
4 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
SEC309D
©GO TO 5.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3175

5 CHECK POWER SUPPLY
1. Disconnect throttle position sensor harness connector.
SEF265S
2. Turn ignition switch ON.
3. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEF564P
Voltage: Approximately 5V
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 the Wiring Diagram.
SEF565P
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK©GO TO 8.
NG©GO TO 7.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3176

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.
8 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 23 and terminal 2.
Refer to the Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II)©GO TO 9.
OK (Without CONSULT-
II)©GO TO 10.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
9 CHECK 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 ªDATA MONITORº mode with CONSULT-II.
5. Check voltage of ªTHRTL POS SENº under the following conditions.
SEF179Y
NOTE:
Voltage measurement must be made with throttle position sensor installed in vehicle.
MTBL0579
If NG, adjust closed throttle position switch. Refer to ªBasic Inspectionº, EC-3086.
OK or NG
OK (Type B in step 1)©GO TO 11.
OK (Type A or C in step
1)©GO TO 14.
NG©Replace throttle position sensor. To adjust it, perform ªBasic Inspectionº, EC-3086.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3177

10 CHECK THROTTLE POSITION SENSOR
Without 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. Check voltage between ECM terminal 23 (Throttle position sensor signal) and ground under the following conditions.
SEF767W
NOTE:
Voltage measurement must be made with throttle position sensor installed in vehicle.
MTBL0579
If NG, adjust closed throttle position switch. Refer to ªBasic Inspectionº, EC-3086.
OK or NG
OK (Type B in step 1)©GO TO 11.
OK (Type A or C in step
1)©GO TO 14.
NG©Replace throttle position sensor. To adjust it, perform ªBasic Inspectionº, EC-3086.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3178

11 CHECK 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.
SEF326V
MTBL0326
4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it again. Repeat
above check.
5. If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.
SEF893J
OK or NG
OK©GO TO 12.
NG©Replace mass air flow sensor.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3179

12 CHECK CAMSHAFT POSITION SENSOR
1. Start engine and warm it up to normal operating temperature.
2. Check voltage between ECM terminals 49 or (44)* and engine ground, ECM terminals 44, 48 or (49, 53)* and engine
ground.
SEC273D
*: Model with NATS (Nissan Anti-Theft System)
OK or NG
OK©GO TO 13.
NG©Replace distributor assembly with camshaft position sensor.
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3180

13 CHECK FUEL INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
SEF836Q
Resistance: 10 - 14W[at 25ÉC (77ÉF)]
OK or NG
OK©GO TO 14.
NG©Replace fuel injector.
14 CHECK SHIELD CIRCUIT
1. Turn ignition switch OFF.
2. Remove joint connector-3.
3. Check the following.
+Continuity between joint connector-3 terminal 2 and ground
+Joint connector-3
(Refer to ªHARNESS LAYOUTº, EL section.)
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector.
OK or NG
OK©GO TO 15.
NG©Repair open circuit or short to power in harness or connectors.
15 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
DTC P0121 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3181

Component DescriptionNEEC1558NOTE:
If DTC P0121, P0122 or P0123 is displayed with DTC P0510, first perform trouble diagnosis for DTC
P0510, EC-3301.
The throttle position sensor responds to the accelerator pedal movement. This sensor is a type of potentiom-
eter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In
addition, 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 ªWide open and closed
throttle position switchº, which is built into the throttle position sensor unit, is not used for engine control.
SEF105S
CONSULT-II Reference Value in Data Monitor
Mode
NEEC1559Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL POS SEN+Ignition switch: ON
(Engine stopped)
+Engine: After warming upThrottle 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 upThrottle valve: fully closed 0.0%
Throttle valve: fully opened Approx. 80%
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Component Description
EC-3182