NISSAN ALMERA 2001 Service Manual

SEF237U
On Board Diagnosis LogicNJEC0097Under the condition in which the heated oxygen sensor 1 (front)
signal is not input, the ECM circuits will read a continuous approxi-
mately 0.3V. Therefore, for this diagnosis, the time that output
voltage is within 200 to 400 mV range is monitored, and the diag-
nosis checks that this time is not inordinately long.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0130
0130+The voltage from the sensor is constantly approx. 0.3V.+Harness or connectors
(The sensor circuit is open or shorted.)
+Heated oxygen sensor 1 (front)
SEF825Y
SEF826Y
SEF645Y
DTC Confirmation ProcedureNJEC0098CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:
+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) Select ªHO2S1 (B1) P0130º of ªHO2S1 (B1)º in ªDTC WORK
SUPPORTº mode with CONSULT-II.
3) Touch ªSTARTº.
4) Let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,200 rpm after this step. If
the engine speed limit is exceeded, return to step 4.
5) 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 10 to 60 seconds.)
ENG SPEED 1,700 - 2,600 rpm
Vehicle speed 64 - 100 km/h (40 - 62 MPH)
B/FUEL SCHDL 3.0 - 5.2 msec
Selector lever Suitable position
If ªTESTINGº is not displayed after 5 minutes, retry from
step 2.
6) Make sure that ªOKº is displayed after touching ªSELF-DIAG
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
On Board Diagnosis Logic
EC-217

RESULTSº. If ªNGº is displayed, refer to ªDiagnostic
Procedureº, EC-221.
SEF011X
Overall Function CheckNJEC0099Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
Without CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 62 (HO2S1 sig-
nal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
stant under no load.
+The voltage does not remain in the range of 0.2 - 0.4V.
4) If NG, go to ªDiagnostic Procedureº, EC-221.
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Overall Function Check
EC-218

Wiring DiagramNJEC0100SEDAN MODELS AND HATCHBACK MODELS WITH
ECM IN ENGINE COMPARTMENT
NJEC0100S03
HEC785
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Wiring Diagram
EC-219

HATCHBACK MODELS WITH ECM IN CABINNJEC0100S04
HEC936
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Wiring Diagram (Cont'd)
EC-220

Diagnostic ProcedureNJEC0101
1 INSPECTION START
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
JEF104Y
3. Disconnect heated oxygen sensor 1 (front) harness connector.
SEF012XA
©GO TO 2.
2 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 62 and heated oxygen sensor 1 (front) harness connector terminal 2.
Refer to wiring diagram.
Continuity should exist.
3. Check harness continuity between ECM terminal 62 (or terminal 2) and ground.
Continuity should not exist.
4. Also check harness for short to power.
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 HEATED OXYGEN SENSOR 1 (FRONT)
Refer to ªComponent Inspectionº, EC-222.
OK or NG
OK©GO TO 4.
NG©Replace heated oxygen sensor 1 (front).
4 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-177.
©INSPECTION END
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Diagnostic Procedure
EC-221

SEF646Y
SEF647Y
Component InspectionNJEC0102HEATED OXYGEN SENSOR 1 (FRONT)NJEC0102S01With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Select ªMANU TRIGº in ªDATA MONITORº mode, and select
ªHO2S1 (B1)º and ªHO2S1 MNTR (B1)º.
3) Hold engine speed at 2,000 rpm under no load during the fol-
lowing steps.
4) Touch ªRECORDº on CONSULT-II screen.
5) Check the following.
+ªHO2S1 MNTR (B1)º in ªDATA MONITORº mode changes from
ªRICHº to ªLEANº to ªRICHº 5 times in 10 seconds.
5 times (cycles) are counted as shown below:
R = ªHO2S1 MNTR (B1)º, ªRICHº
L = ªHO2S1 MNTR (B1)º, ªLEANº
+ªHO2S1 (B1)º voltage goes above 0.6V at least once.
+ªHO2S1 (B1)º voltage goes below 0.3V at least once.
+ªHO2S1 (B1)º voltage never exceeds 1.0V.
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 sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
SEF648Y
SEF011X
Without CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 62 (HO2S1 sig-
nal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
stant under no load.
+The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more
than 5 times within 10 seconds.
+The maximum voltage is over 0.6V at least one time.
+The minimum voltage is below 0.3V at least one time.
+The voltage never exceeds 1.0V.
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Component Inspection
EC-222

1 time: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V
2 times: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V®0.6 - 1.0V®0-
0.3V
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 sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
DTC P0130 HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)QG
Component Inspection (Cont'd)
EC-223

SEF463R
SEF288D
Component DescriptionNJEC0103The heated oxygen sensor 1 (front) is placed into the exhaust
manifold. It detects the amount of oxygen in the exhaust gas com-
pared to the outside air. The heated oxygen sensor 1 (front) has a
closed-end tube made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions. The heated oxygen sensor 1 (front) signal is sent to the
ECM. The ECM adjusts the injection pulse duration to achieve the
ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical
change from 1V to 0V.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0104Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1)
+Engine: After warming upMaintaining engine speed at 2,000
rpm0 - 0.3V¨Approx. 0.6 - 1.0V
HO2S1 MNTR
(B1)LEAN¨RICH
Changes more than 5 times during
10 seconds.
ECM Terminals and Reference ValueNJEC0105Specification 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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
62 WHeated oxygen sensor
1 (front)[Engine is running]
+After warming up to normal operating temperature
and engine speed is 2,000 rpm0 - Approximately 1.0V
SEF008W
DTC P0131 HEATED OXYGEN SENSOR 1 (FRONT) (LEAN SHIFT
MONITORING)
QG
Component Description
EC-224

SEF300U
On Board Diagnosis LogicNJEC0106To judge the malfunction, the output from the heated oxygen sen-
sor 1 (front) is monitored to determine whether the ªrichº output is
sufficiently high and whether the ªleanº output is sufficiently low.
When both the outputs are shifting to the lean side, the malfunc-
tion will be detected.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0131
0131+The maximum and minimum voltages from the sensor
are not reached to the specified voltages.+Heated oxygen sensor 1 (front)
+Heated oxygen sensor 1 heater (front)
+Fuel pressure
+Injectors
+Intake air leaks
SEF827Y
SEF828Y
SEF651Y
DTC Confirmation ProcedureNJEC0107CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 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 9 seconds.
3) Turn ignition switch ªONº and select ªHO2S1 (B1) P0131º of
ªHO2S1º in ªDTC WORK SUPPORTº mode with CONSULT-II.
4) Touch ªSTARTº.
5) Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,200 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 50 seconds or more.)
ENG SPEED 1,700 - 2,600 rpm
Vehicle speed 64 - 100 km/h (40 - 62 MPH)
B/FUEL SCHDL 3.0 - 5.2 msec
Selector lever Suitable position
If ªTESTINGº is not displayed after 5 minutes, retry from
step 2.
DTC P0131 HEATED OXYGEN SENSOR 1 (FRONT) (LEAN SHIFT
MONITORING)
QG
On Board Diagnosis Logic
EC-225

7) Make sure that ªOKº is displayed after touching ªSELF-DIAG
RESULTSº. If ªNGº is displayed, refer to ªDiagnostic
Procedureº, EC-226.
SEF011X
Overall Function CheckNJEC0108Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
Without CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 62 (HO2S1 sig-
nal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
stant under no load.
+The maximum voltage is over 0.6V at least one time.
+The minimum voltage is over 0.1V at least one time.
4) If NG, go to ªDiagnostic Procedureº, EC-226.
Diagnostic ProcedureNJEC0109
1 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
1. Turn ignition switch ªOFFº.
2. Loosen and retighten heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N´m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
©GO TO 2.
DTC P0131 HEATED OXYGEN SENSOR 1 (FRONT) (LEAN SHIFT
MONITORING)
QG
DTC Confirmation Procedure (Cont'd)
EC-226