2001 NISSAN PICK-UP Repair Manual

DTC Confirmation Procedure=NEEC1562NOTE:
If ªDTC Confirmation Procedureº 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.
SEF065Y
With CONSULT-II
1) Turn ignition switch ON and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE More than 4 km/h (2 MPH)
Selector lever Suitable position except ªNº position
3) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3186.
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3184

Wiring DiagramNEEC1563
GEC243A
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Wiring Diagram
EC-3185

Diagnostic ProcedureNEEC1564
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
SEC309D
©GO TO 2.
2 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 3.
NG©Repair harness or connectors.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3186

3 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 5.
NG©GO TO 4.
4 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.
5 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 6.
OK (Without CONSULT-
II)©GO TO 7.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3187

6 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 8.
OK (Type A or C in step
1)©GO TO 11.
NG©Replace throttle position sensor. To adjust it, perform ªBasic Inspectionº, EC-3086.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3188

7 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 8.
OK (Type A or C in step
1)©GO TO 11.
NG©Replace throttle position sensor. To adjust it, perform ªBasic Inspectionº, EC-3086.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3189

8 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 9.
NG©Replace mass air flow sensor.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3190

9 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 10.
NG©Replace distributor assembly with camshaft position sensor.
DTC P0122, P0123 TP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3191