check engine NISSAN PICK-UP 2001 Repair Manual

Diagnostic Procedure=NEEC0243
1 CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
OK or NG
OK©GO TO 2.
NG©Repair or replace.
2 CHECK EXHAUST AIR LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst.
SEF099P
OK or NG
OK©GO TO 3.
NG©Repair or replace.
3 CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK©GO TO 4.
NG©Repair or replace.
4 CHECK IGNITION TIMING
1. Check the following items. Refer to ªBasic Inspectionº, EC-3086.
MTBL1315
OK or NG
OK©GO TO 5.
NG©Adjust ignition timing.
DTC P0420 THREE WAY CATALYST
FUNCTION
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3280

5 CHECK INJECTORS
1. Refer to Wiring Diagram for Injectors, EC-3370.
2. Stop engine and then turn ignition switch ON.
3. Check voltage between ECM terminals 102, 104, 109 and 111 and ground with CONSULT-II or tester.
LEC041A
Battery voltage should exist.
OK or NG
OK©GO TO 6.
NG©Perform ªDiagnostic Procedureº INJECTOR, EC-3371.
6 CHECK IGNITION SPARK
1. Disconnect ignition wire from spark plug.
2. Connect a known good spark plug to the ignition wire.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.
SEF282G
OK or NG
OK©GO TO 8.
NG©GO TO 7.
DTC P0420 THREE WAY CATALYST
FUNCTION
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3281

4 DETECT MALFUNCTIONING PART
Check the harness for open or short between EVAP canister purge volume control solenoid valve and ECM.
©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1. Start engine.
2. Perform ªPURG VOL CONT/Vº in ªACTIVE TESTº mode with CONSULT-II. Check that engine speed varies according
to the valve opening.
SEF801Y
OK or NG
OK©GO TO 7.
NG©GO TO 6.
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3288

SEF505U
Component DescriptionNEEC0272The vehicle speed sensor is installed in the transmission. It con-
tains a pulse generator which provides a vehicle speed signal to
the speedometer. The speedometer then sends a signal to the
ECM.
ECM Terminals and Reference ValueNEEC0273Specification 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)
29 W/L Vehicle speed sensor[Engine is running]
+Lift up the vehicle
+In 2nd gear position
+Vehicle speed is 40 km/h (25 MPH)1-4V
SEF003W
On Board Diagnosis LogicNEEC0274
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0500
0500+The almost 0 km/h (0 MPH) signal from vehicle speed
sensor is sent to ECM even when vehicle is being
driven.+Harness or connector
(The vehicle speed sensor circuit is open or
shorted.)
+Vehicle speed sensor
DTC Confirmation ProcedureNEEC0275CAUTION:
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:
This procedure 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.
DTC P0500 VSSKA24DE (EURO OBD)
Component Description
EC-3290

SEF196Y
With CONSULT-II
1) Start engine
2) Read vehicle speed sensor signal in ªDATA MONITORº mode
with CONSULT-II. The vehicle speed on CONSULT-II should
exceed 10 km/h (6 MPH) when rotating wheels with suitable
gear position.
3) If NG, go to ªDiagnostic Procedureº, EC-3294.
If OK, go to following step.
4) Select ªDATA MONITORº mode with CONSULT-II.
5) Warm engine up to normal operating temperature.
6) Maintain the following conditions for at least 1 minute.
ENG SPEED 1,800 - 6,000 rpm
COOLAN TEMP/S More than 70ÉC (158ÉF)
B/FUEL SCHDL 7 - 15 msec
Selector lever Suitable position
PW/ST SIGNAL OFF
7) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3294.
SEF568P
Overall Function CheckNEEC0276Use this procedure to check the overall function of the EVAP can-
ister vent control valve circuit. During this check, a 1st trip DTC
might not be confirmed.
With GST
1) Lift up drive wheels.
2) Start engine.
3) Read vehicle speed sensor signal in ªMODE 1º with GST.
The vehicle speed sensor on GST should be able to exceed
10 km/h (6 MPH) when rotating wheels with suitable gear posi-
tion.
4) If NG, go to ªDiagnostic Procedureº, EC-3294.
DTC P0500 VSSKA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3291

ECM Terminals and Reference Value=NEEC1596Specification 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)
101 G/Y IACV-AAC valve[Engine is running]
+Warm-up condition
+Idle speed10.5 - 11.5V
SEF015W
[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpm1 - 13V
SEF016W
On Board Diagnosis LogicNEEC1597
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0505
0505A) The IACV-AAC valve does not operate properly.+Harness or connectors
(The IACV-AAC valve circuit is open.)
+IACV-AAC valve
B) The IACV-AAC valve does not operate properly.+Harness or connectors
(The IACV-AAC valve circuit is shorted.)
+IACV-AAC valve
DTC P0505 ISC SYSTEMKA24DE (EURO OBD)
ECM Terminals and Reference Value
EC-3296

Diagnostic ProcedureNEEC1600
1 CHECK POWER SUPPLY
1. Stop engine.
2. Disconnect IACV-AAC valve harness connector.
SEF342V
3. Turn ignition switch ON.
4. Check voltage between terminal 2 and ground with CONSULT-II or tester.
SEC271D
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 IACV-AAC valve 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 ECM terminal 101 and terminal 1. Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and 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 P0505 ISC SYSTEMKA24DE (EURO OBD)
Diagnostic Procedure
EC-3299

SEF197Y
SEF198Y
DTC Confirmation Procedure=NEEC0290CAUTION:
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.
With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Select ªCLSD THL/P SWº in ªDATA MONITORº mode with
CONSULT-II and check the value under the following condi-
tions.
Condition Signal indication
Throttle valve: Idle position ON
Throttle valve: Slightly open OFF
If the result is NG, go to ªDiagnostic Procedureº, EC-3304.
If OK, go to following step.
3) Select ªDATA MONITORº mode with CONSULT-II.
4) Drive the vehicle for at least 5 consecutive seconds under the
following condition.
THRTL POS SEN More than 2.5V
VHCL SPEED SE More than 4 km/h (2 MPH)
Selector lever Suitable position
Driving pattern Driving vehicle uphill (Increased engine load)
will help maintain the driving conditions
required for this test.
5) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-3304.
SEF422Q
Overall Function CheckNEEC0291Use this procedure to check the overall function of the closed
throttle position switch 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) Check the voltage between ECM terminal 28 (Closed throttle
position switch signal) and ground under the following condi-
tions.
Condition Voltage
At idle Battery voltage
At 2,000 rpm Approximately0-1V
3) If NG, go to ªDiagnostic Procedureº, EC-3304.
DTC P0510 CTP SWITCHKA24DE (EURO OBD)
DTC Confirmation Procedure
EC-3302

Diagnostic ProcedureNEEC0293
1 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect throttle position switch harness connector.
SEF158S
3. Turn ignition switch ON.
4. Check voltage between terminal 5 and engine ground with CONSULT-II or tester.
SEF715U
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 throttle position switch and 10A fuse
©Repair harness or connectors.
DTC P0510 CTP SWITCHKA24DE (EURO OBD)
Diagnostic Procedure
EC-3304

6 CHECK CLOSED THROTTLE POSITION SWITCH
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and turn ignition switch ON.
3. Select ªDATA MONITORº mode with CONSULT-II.
4. Check indication of ªCLSD THL/P SWº under the following conditions.
SEF721Z
NOTE:
Measurement must be made with closed throttle position switch installed in vehicle.
If NG, adjust closed throttle position switch. Refer to ªBasic Inspectionº, EC-3086.
5. If it is impossible to adjust closed throttle position switch in ªBasic Inspectionº, replace closed throttle position switch.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect throttle position switch harness connector.
4. Check continuity between terminals 5 and 6 under the following conditions.
SEF159S
MTBL0299
NOTE:
Continuity measurement must be made with closed throttle position switch installed in vehicle.
If NG, adjust closed throttle position switch. Refer to ªBasic Inspectionº, EC-3086.
5. If it is impossible to adjust closed throttle position switch in ªBasic Inspectionº, replace closed throttle position switch.
OK or NG
OK©GO TO 7.
NG©Replace throttle position switch.
DTC P0510 CTP SWITCHKA24DE (EURO OBD)
Diagnostic Procedure
EC-3306