2001 NISSAN PICK-UP stop start

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.
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NOTE:
Voltage measurement must be made with throttle position sensor installed in vehicle.
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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

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On Board Diagnosis LogicNEEC0122To judge the malfunction of heated oxygen sensor 1, this diagno-
sis measures response time of heated oxygen sensor 1 signal. The
time is compensated by engine operating (speed and load), fuel
feedback control constant, and heated oxygen sensor 1 tempera-
ture index. Judgment is based on whether the compensated time
[heated oxygen sensor 1 cycling time index] is inordinately long or
not.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0133
0133+The response of the voltage signal from the sensor takes
more than the specified time.+Harness or connectors
(The sensor circuit is open or shorted.)
+Heated oxygen sensor 1
+Heated oxygen sensor 1 heater
+Fuel pressure
+Injectors
+Intake air leaks
+Exhaust gas leaks
+PCV
+Mass air flow sensor
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DTC Confirmation ProcedureNEEC0123CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch OFF and wait at least 5 seconds before
conducting the next test.
TESTING CONDITION:
+Always perform at a temperature above þ10ÉC (14ÉF).
+Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Stop engine and wait at least 5 seconds.
3) Turn ignition switch ON and select ªHO2S1 (B1) P0133º of
ªHO2S1º in ªDTC WORK SUPPORTº mode with CONSULT-II.
4) Touch ªSTARTº.
5) Start engine and let it idle for at least 3.0 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6) When the following conditions are met, ªTESTINGº will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until ªTESTINGº changes to ªCOMPLETEDº. (It
will take approximately 20 seconds.)
ENG SPEED 1,750 - 3,750 rpm
Vehicle speed More than 80 km/h (More than 50 MPH)
B/FUEL SCHDL 3.5 - 15.5 msec
Selector lever Suitable position
If ªTESTINGº is not displayed after 5 minutes, retry from
step 2.
DTC P0133 HO2S1KA24DE (EURO OBD)
On Board Diagnosis Logic
EC-3203

4 CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak between the mass air flow sensor and the intake manifold.
OK or NG
OK©GO TO 5.
NG©Repair or replace.
5 CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªSELF-LEARNING CONTº in ªWORK SUPPORTº mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching ªCLEARº.
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4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected? Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch ªOFFº.
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 3 seconds at idle speed.
AEC131A
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure DTC P0102 is displayed.
6. Erase DTC memory. Refer to ªHOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATIONº, EC-3060.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected? Is it difficult to start engine?
YesorNo
Ye s©Perform trouble diagnosis for DTC P0171, P0172. Refer to EC-3237, 3244.
No©GO TO 6.
DTC P0133 HO2S1KA24DE (EURO OBD)
Diagnostic Procedure
EC-3207

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DTC Confirmation ProcedureNEEC0175NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch OFF and wait at least 5 seconds before
conducting the next test.
With CONSULT-II
1) Turn ignition switch ON and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
3) Maintain the following conditions for at least 5 consecutive
seconds.
ENG SPEED 1,100 - 3,600 rpm
VHCL SPEED SE 32 - 120 km/h (20 - 75 MPH)
B/FUEL SCHDL 3.5 - 15.5 msec
COOLAN TEMP/S More than 70ÉC (158ÉF)
Selector lever Suitable position
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3223.
AEC874A
Overall Function CheckNEEC0176Use this procedure to check the overall function of the heated oxy-
gen sensor 2 circuit. During this check, a 1st trip DTC might not be
confirmed.
Without CONSULT-II
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminals 56 (Heated oxy-
gen sensor 2 signal) and engine ground.
4) Check the voltage after revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be below 1.4V during this procedure.
5) If NG, go to ªDiagnostic Procedureº, EC-3223.
DTC P0138 HO2S2KA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3221

6 CHECK HARNESS CONNECTOR
Check heated oxygen sensor 2 harness connector for water.
Water should not exist.
OK or NG
OK (With CONSULT-II)©GO TO 7.
OK (Without CONSULT-
II)©GO TO 8.
NG©Repair or replace harness connector.
7 CHECK HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
3. Stop vehicle with engine running.
4. Select ªFUEL INJECTIONº in ªACTIVE TESTº mode, and select ªHO2S2 (B1)º as the monitor item with CONSULT-II.
5. Check ªHO2S2 (B1)º at idle speed when adjusting ªFUEL INJECTIONº to±25%.
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ªHO2S2 (B1)º should be above 0.56V at least once when the ªFUEL INJECTIONº is +25%. ªHO2S2 (B1)º should
be below 0.54V at least once when the ªFUEL INJECTIONº is þ25%.
CAUTION:
+Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto
a hard surface such as a concrete floor; use a new one.
+Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner
tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
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OK or NG
OK©GO TO 9.
NG©Replace heated oxygen sensor 2.
DTC P0138 HO2S2KA24DE (EURO OBD)
Diagnostic Procedure
EC-3224

8 CHECK HEATED OXYGEN SENSOR 2
Without CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
3. Stop vehicle with engine running.
4. Set voltmeter probes between ECM terminals 56 (Heated oxygen sensor 2 signal) and engine ground.
AEC874A
5. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.56V at least once.
If the voltage is above 0.56V at step 4, step 5 is not necessary.
6. Check the voltage when revving up to 5,000 rpm under no load. Or keep vehicle at idling for 10 minutes, then check
the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in 3rd gear position (M/T), ªDº position with
ªODº OFF (A/T).
The voltage should be below 0.54V at least once.
CAUTION:
+Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto
a hard surface such as a concrete floor; use a new one.
+Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner
tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
OK or NG
OK©GO TO 9.
NG©Replace heated oxygen sensor 2.
9 CHECK SHIELD CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect joint connector-3.
3. Check harness continuity between joint connector-3 terminal 1 and ground. Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector-3.
OK or NG
OK©GO TO 11.
NG©GO TO 10.
10 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-3 (Refer to ªHARNESS LAYOUTº, EL section.)
+Harness for open or short between joint connector-3 and engine ground
©Repair open circuit, short to power in harness or connectors.
DTC P0138 HO2S2KA24DE (EURO OBD)
Diagnostic Procedure
EC-3225

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DTC Confirmation ProcedureNEEC0166
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CAUTION:
Always drive vehicle at a safe speed.
NOTE:
+ªCOMPLETEDº will appear on CONSULT-II screen when all
tests ªCOND1º, ªCOND2º and ªCOND3º are completed.
+If ªDTC Confirmation Procedureº has been previously
conducted, always turn ignition switch ªOFFº and wait at least
5 seconds before conducting the next test.
TESTING CONDITION:
Never stop engine during this procedure. If the engine is
stopped, retry this procedure from step 2 in ªProcedure for
COND1º.
WITH CONSULT-IINEEC0166S01Procedure for COND1NEEC0166S01011. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch ªOFFº and wait at least 5 seconds.
3. Turn ignition switch ªONº and select ªHO2S2 (B1) P0139º of
ªHO2S2º in ªDTC WORK SUPPORTº mode with CONSULT-II.
4. Touch ªSTARTº.
5. Start engine and let it idle for at least 30 seconds.
6. Rev engine up to 2,000 rpm 2 or 3 times quickly under no load.
If ªCOMPLETEDº appears on CONSULT-II screen, go to step
2 in ªProcedure for COND3º.
If ªCOMPLETEDº does not appear on CONSULT-II screen, go
to the following step.
7. Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
8. When the following conditions are met, ªTESTINGº will be dis-
played at ªCOND1º on the CONSULT-II screen. Maintain the
conditions continuously until ªTESTINGº changes to ªCOM-
PLETEDº. (It will take approximately 60 seconds.)
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLANT TEMP/S 70 - 105ÉC
Selector level Suitable position
NOTE:
+If ªTESTINGº is not displayed after 5 minutes, retry from
step 2 in ªProcedure for COND1º.
+If ªCOMPLETEDº already appears at ªCOND2º on CON-
SULT-II screen before ªProcedure for COND2º is
conducted, it is unnecessary to conduct step 1 in ªProce-
dure for COND2º.
DTC P0139 HO2S2KA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3228

PBIB0553E
Procedure for COND2NEEC0166S01021. While driving, release accelerator pedal completely from the
above condition [step 8] until ªINCOMPLETEº at ªCOND2º on
CONSULT-II screen has turned to ªCOMPLETEDº. (If will take
approximately 4 seconds.)
NOTE:
If ªCOMPLETEDº already appears at ªCOND3º on CONSULT-II
screen before ªProcedure for COND3º is conducted, it is
unnecessary to conduct step 1 in ªProcedure for COND3º.
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Procedure for COND3NEEC0166S01031. Stop vehicle and let is idle until ªINCOMPLETEº of ªCOND3º
on CONSULT-II screen has turned to ªCOMPLETEDº. (It will
take a maximum of approximately 6 minutes.)
2. Make sure that ªOKº is displayed after touching ªSELF-DIAG
RESULTSº.
If ªNGº is displayed, refer to EC-3231, ªDiagnostic Procedureº.
AEC874A
Overall Function CheckNEEC0167Use this procedure to check the overall function of the heated oxy-
gen sensor 2 circuit. During this check, a 1st trip DTC might not be
confirmed.
CAUTION:
Always drive vehicle at a safe speed.
Without CONSULT-II
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminals 56 (Heated oxy-
gen sensor 2 signal) and engine ground.
4) Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should change at more than 0.06V for 1 sec-
ond during this procedure.
If the voltage can be confirmed in step 4, step 5 is not
necessary.
5) Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in 3rd gear position.
The voltage should change at more than 0.06V for 1 sec-
ond during this procedure.
6) If NG, go to ªDiagnostic Procedureº, EC-3231.
DTC P0139 HO2S2KA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3229