sensor NISSAN PICK-UP 2001 Manual Online

DescriptionNEEC1003The specification (SP) value indicates the tolerance of the value that is displayed in ªDATA MONITOR (SPEC)º
mode of CONSULT-II during normal operation of the Engine Control System. When the value in ªDATA MONI-
TOR (SPEC)º mode is within the SP value, the Engine Control System is confirmed OK. When the value in
ªDATA MONITOR (SPEC)º mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MI.
The SP value will be displayed for the following three items:
+B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
+A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
+MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionNEEC1004+Vehicle driven distance: More than 5,000 km (3,107 miles)
+Barometric pressure: 101.3 kPa (1,013 mbar, 760.0 mmHg, 29.92 inHg)±3 kPa (30 mbar, 22.5 mmHg, 0.89
inHg)
+Atmospheric temperature: 20 - 30ÉC (68 - 86ÉF)
+Engine coolant temperature: 75 - 95ÉC (167 - 203ÉF)
+Transmission: Warmed-up*1
+Electrical load: Not applied*2
+Engine speed: Idle
*1: For A/T models, after the engine is warmed up to normal operating temperature, drive vehicle until ªFLUID
TEMP SEº (A/T fluid temperature sensor signal) indicates less than 0.9V. For M/T models, drive vehicle for 5
minutes after the engine is warmed up to normal operating temperature.
*2: Rear window defogger switch, air conditioner switch, lighting switch are ªOFFº. Cooling fans are not oper-
ating. Steering wheel is straight ahead.
SEF601Z
Inspection ProcedureNEEC1005NOTE:
Perform ªDATA MONITOR (SPEC)º mode in maximum scale dis-
play.
1. Perform ªBasic Inspectionº, EC-3086.
2. Confirm that the testing conditions indicated above are met.
3. Select ªB/FUEL SCHDLº, ªA/F ALPHA-B1º and ªMAS A/F
SE-B1º in ªDATA MONITOR (SPEC)º mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to ªDiagnostic Procedureº, EC-3120.
TROUBLE DIAGNOSIS Ð SPECIFICATION
VALUE
KA24DE (EURO OBD)
Description
EC-3119

DescriptionNEEC0136SYSTEM DESCRIPTIONNEEC0136S01
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speedHeated
oxygen
sensor 1
heater con-
trolHeated oxygen sensor 1 heater
The ECM performs ON/OFF control of the heated oxygen sensor 1 heater corresponding to the engine oper-
ating condition.
OPERATIONNEEC0136S02
Engine speed Heated oxygen sensor 1 heater
Above 3,600 rpm OFF
Below 3,600 rpm ON
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0137Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1)+Engine speed: Below 3,600 rpm ON
+Engine speed: Above 3,600 rpm OFF
ECM Terminals and Reference ValueNEEC0138Specification 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)
119 Y/RHeated oxygen sensor 1
heater[Engine is running]
+Engine speed is below 3,600 rpm.Approximately 0.4V
[Engine is running]
+Engine speed is above 3,600 rpm.BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis LogicNEEC0139
DTC No.Trouble diag-
nosis nameDTC detecting condition Possible cause
P0031
0031Heated oxy-
gen sensor 1
heater con-
trol circuit
low+The current amperage in the heated oxygen sen-
sor 1 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)+Harness or connectors
(The heated oxygen sensor 1 heater circuit
is open or shorted.)
+Heated oxygen sensor 1 heater
P0032
0032Heated oxy-
gen sensor 1
heater con-
trol circuit
high+The current amperage in the heated oxygen sen-
sor 1 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)+Harness or connectors
(The heated oxygen sensor 1 heater circuit
is shorted.)
+Heated oxygen sensor 1 heater
DTC P0031, P0032 HO2S1 HEATERKA24DE (EURO OBD)
Description
EC-3133

Diagnostic ProcedureNEEC0142
1 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
SEF331VC
3. Turn ignition switch ON.
4. Check voltage between terminal 3 and ground with CONSULT-II or tester.
SEF732Z
Voltage: Battery voltage
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+10A fuse
+Harness for open or short between heated oxygen sensor 1 and 10A fuse
©Repair harness or connectors.
3 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 1 terminal 1 and ECM terminal 119. Refer to the Wiring Dia-
gram.
Continuity should exist.
4. Also check harness for short to ground or short to power.
OK or NG
OK©GO TO 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0031, P0032 HO2S1 HEATERKA24DE (EURO OBD)
Diagnostic Procedure
EC-3136

4 CHECK HEATED OXYGEN SENSOR 1 HEATER
Check resistance between terminals 1 and 3.
SEF731Z
Resistance: 2.3 - 4.3Wat 25ÉC (77ÉF)
Check continuity between terminals 1 and 2, 3 and 2.
Continuity should not exist.
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 5.
NG©Replace heated oxygen sensor 1.
5 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
DTC P0031, P0032 HO2S1 HEATERKA24DE (EURO OBD)
Diagnostic Procedure
EC-3137

DescriptionNEEC0180SYSTEM DESCRIPTIONNEEC0180S01
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speedHeated
oxygen
sensor 2
heater con-
trolHeated oxygen sensor 2 heater
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed.
OPERATIONNEEC0180S02
Engine speed rpm Heated oxygen sensor 2 heater
Above 4,000 OFF
Below 4,000 ON
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0181Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)+Engine speed: Below 4,000 rpm [After driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more]ON
+Ignition switch ON (Engine stopped)
+Engine is running above 4,000 rpmOFF
ECM Terminals and Reference ValueNEEC0182Specification 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)
122 G/BHeated oxygen sensor 2
heater[Engine is running]
+After driving for 2 minutes at a speed of 70 km/h
(43 MPH) or moreApproximately 0.4V
[Ignition switch ªONº]
+Engine stoppedBATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis LogicNEEC0183
DTC No.Trouble diag-
nosis nameDTC detecting condition Possible cause
P0037
0037Heated oxy-
gen sensor 2
heater con-
trol circuit
low+The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to
ECM through the heated oxygen sensor 2
heater.)+Harness or connectors
(The heated oxygen sensor 2 heater circuit
is open or shorted.)
+Heated oxygen sensor 2 heater
DTC P0037, P0038 HO2S2 HEATERKA24DE (EURO OBD)
Description
EC-3138

DTC No.Trouble diag-
nosis nameDTC detecting condition Possible cause
P0038
0038Heated oxy-
gen sensor 2
heater con-
trol circuit
high+The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 2
heater.)+Harness or connectors
(The heated oxygen sensor 2 heater circuit
is shorted.)
+Heated oxygen sensor 2 heater
DTC Confirmation ProcedureNEEC0184NOTE:
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:
Before performing the following procedure, confirm that bat-
tery voltage is in between 10.5V at idle.
SEF175Y
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) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3141.
With GST
1) Start engine.
2) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
3) Stop vehicle and let engine idle for at least 6 seconds.
4) Turn ignition switch OFF and wait at least 10 seconds.
5) Start engine.
6) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes
7) Stop vehicle and let engine idle for at least 6 seconds.
8) Select ªMODE 3º with GST.
9) If DTC is detected, go to ªDiagnostic Procedureº, EC-3141.
When using GST, ªDTC Confirmation Procedureº should be
performed twice as much as when using CONSULT-II because
GST cannot display MODE 7 (1st trip DTC) concerning this
diagnosis. Therefore, using CONSULT-II is recommended.
DTC P0037, P0038 HO2S2 HEATERKA24DE (EURO OBD)
On Board Diagnosis Logic
EC-3139

Diagnostic ProcedureNEEC0186
1 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Turn ignition switch ON.
4. Check voltage between terminal 2 and ground.
SEF218W
Voltage: Battery voltage
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
+10A fuse
+Harness for open or short between heated oxygen sensor 2 and 10A fuse
©Repair harness or connectors.
3 CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 2 terminal 3 and ECM terminal 122. Refer to the Wiring Dia-
gram.
Continuity should exist.
4. Also check harness for short to ground or short to power.
OK or NG
OK©GO TO 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0037, P0038 HO2S2 HEATERKA24DE (EURO OBD)
Diagnostic Procedure
EC-3141

4 CHECK HEATED OXYGEN SENSOR 2 HEATER
Check the following.
1. Check resistance between terminals 2 and 3.
SEF221W
Resistance: 2.3 - 4.3Wat 25ÉC (77ÉF)
2. Check continuity.
MTBL0330
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 5.
NG©Replace heated oxygen sensor 2.
5 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
DTC P0037, P0038 HO2S2 HEATERKA24DE (EURO OBD)
Diagnostic Procedure
EC-3142

SEF893J
Component DescriptionNEEC0050The mass air flow sensor is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. It consists of a hot wire that is supplied with electric
current from the ECM. The temperature of the hot wire is controlled
by the ECM a certain amount. The heat generated by the hot wire
is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor
Mode
NEEC0051Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1+Engine: After warming up
+Air conditioner switch: OFF
+Shift lever: ªNº
+No-loadIdle 0.9 - 1.8V
2,500 rpm 1.9 - 2.3V
CAL/LD VALUE+Engine: After warming up
+Air conditioner switch: OFF
+Shift lever: ªNº
+No-loadIdle 9.5 - 34.0%
2,500 rpm 13.9 - 24.9%
MASS AIRFLOW+Engine: After warming up
+Air conditioner switch: OFF
+Shift lever: ªNº
+No-loadIdle 0.9 - 5.8 g´m/s
2,500 rpm 7.5 - 13.2 g´m/s
ECM Terminals and Reference ValueNEEC0052Specification 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)
54 L Mass air flow sensor[Engine is running]
+Warm-up condition
+Idle speed0.9 - 1.8V
[Engine is running]
+Warm-up condition
+Engine speed is 2,500 rpm1.9 - 2.3V
55 PMass air flow sensor
ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
On Board Diagnosis LogicNEEC0053
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0101
0101A) A high voltage from the sensor is sent to ECM under
light load driving condition.+Harness or connectors
(The sensor circuit is open or shorted.)
+Mass air flow sensor
DTC P0101 MAF SENSORKA24DE (EURO OBD)
Component Description
EC-3143

DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0101
0101B) A low voltage from the sensor is sent to ECM* under
heavy load driving condition.+Harness or connectors
(The sensor circuit is open or shorted.)
+Intake air leaks
+Mass air flow sensor
*: When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
FAIL-SAFE MODENEEC0053S01
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuitEngine speed will not rise more than 2,400 rpm due to the fuel
cut.
DTC Confirmation ProcedureNEEC0054CAUTION:
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.
SEF174Y
PROCEDURE FOR MALFUNCTION ANEEC0054S03NOTE:
If engine will not start or stops soon, wait at least 10 seconds
with engine stopped (Ignition switch ªONº) instead of running
engine at idle speed.
With CONSULT-II
1) Turn ignition switch ON.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and warm it up to normal operating temperature.
4) Run engine for at least 10 seconds at idle speed.
5) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3147.
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0101 MAF SENSORKA24DE (EURO OBD)
On Board Diagnosis Logic
EC-3144