engine NISSAN PICK-UP 2001 Owners Manual

DIAGNOSTIC PROCEDURE=NEEC0049
1 INSPECTION START
Start engine.
Is engine running?
YesorNo
Ye s©GO TO 9.
No©GO TO 2.
2 CHECK POWER SUPPLY-I
1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 24 and ground with CONSULT-II or tester.
SEF600P
Voltage: Battery voltage
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+40A fusible link
+Harness connectors E101, M5
+Ignition switch
+Fuse block M10, M12
+10A fuse
+Harness for open or short between ECM and battery
©Repair harness or connectors.
4 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 10, 19, 25, 32, 116, 124 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER
SUPPLY
KA24DE (EURO OBD)
Main Power Supply and Ground Circuit
EC-3127

9 CHECK POWER SUPPLY-II
1. Stop engine.
2. Check voltage between ECM terminal 80 and ground with CONSULT-II or tester.
MEC698B
Voltage: Battery voltage
OK or NG
OK©GO TO 11.
NG©GO TO 10.
10 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+10A fuse
+Harness for open or short between ECM and fuse
©Repair harness or connectors.
11 CHECK POWER SUPPLY-III
1. Turn ignition switch ON and then OFF.
2. Check voltage between ECM terminals 67, 72, 117 and ground with CONSULT-II or tester.
SEF121V
Voltage:
After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop to approximately
0V.
OK or NG
OK©GO TO 19.
NG (Battery voltage
does not exist.)©GO TO 12.
NG (Battery voltage
exists for more than a
few seconds.)©GO TO 18.
TROUBLE DIAGNOSIS FOR POWER
SUPPLY
KA24DE (EURO OBD)
Main Power Supply and Ground Circuit
EC-3129

18 CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 6 and 7.
PBIB0077E
12V (1 - 2) applied: Continuity exists.
No voltage applied: No continuity
OK or NG
OK©GO TO 19.
NG©Replace ECM relay.
19 CHECK GROUND CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 10, 19, 25, 32, 116, 124 and engine ground.
SEF119V
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK©GO TO 20.
NG©Repair open circuit or short to power in harness or connectors.
20 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3123.
©INSPECTION END
TROUBLE DIAGNOSIS FOR POWER
SUPPLY
KA24DE (EURO OBD)
Main Power Supply and Ground Circuit
EC-3132

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

DTC Confirmation ProcedureNEEC0140NOTE:
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 battery
voltage is more than 11V at idle.
SEF058Y
With CONSULT-II
1) Turn ignition switch ON and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and run it for at least 6 seconds at idle speed.
3) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3136.
With GST
1) Start engine and run it for at least 6 seconds at idle speed.
2) Turn ignition switch OFF and wait least 5 seconds.
3) Start engine and run it for at least 6 seconds at idle speed.
4) Select ªMODE 3º with GST.
5) If DTC is detected, go to ªDiagnostic Procedureº, EC-3136.
+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) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.
DTC P0031, P0032 HO2S1 HEATERKA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3134

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

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

SEF243Y
SEF175Y
PROCEDURE FOR MALFUNCTION BNEEC0054S04With CONSULT-II
1) Turn ignition switch ON.
2) Start engine and warm it up to normal operating temperature.
If engine cannot be started, go to ªDiagnostic Procedureº,
EC-3147.
3) Select ªDATA MONITORº mode with CONSULT-II.
4) Check the voltage of ªMAS A/F SE-B1º with ªDATA MONITORº.
5) Increases engine speed to about 4,000 rpm.
6) Monitor the linear voltage rise in response to engine speed
increases.
If NG, go to ªDiagnostic Procedureº, EC-3147.
If OK, go to following step.
7) Maintain the following conditions for at least 10 consecutive
seconds.
ENG SPEED More than 2,000 rpm
THRTL POS SEN More than 3V
Selector lever Suitable position
Driving location Driving vehicle uphill (Increased engine load)
will help maintain the driving conditions
required for this test.
8) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3147.
SEF534P
Overall Function CheckNEEC0055Use this procedure to check the overall function of the mass air flow
sensor circuit. During this check, a 1st trip DTC might not be con-
firmed.
PROCEDURE FOR MALFUNCTION BNEEC0055S01With GST
1) Turn ignition switch ON.
2) Start engine and warm it up to normal operating temperature.
3) Select ªMODE 1º with GST.
4) Check the mass air flow sensor signal with ªMODE 1º.
5) Check for linear mass air flow rise in response to increases to
about 4,000 rpm in engine speed.
6) If NG, go to ªDiagnostic Procedureº, EC-3147.
DTC P0101 MAF SENSORKA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3145