check engine NISSAN PICK-UP 2001 Repair Manual

13 CHECK HEATED OXYGEN SENSOR 1
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 50 (Heated oxygen sensor 1 signal) and ECM ground.
AEC873A
3. Check the following with engine speed held at 2,000 rpm constant under no load.
+The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more than five times within 10 seconds.
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
+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.
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 14.
NG©Replace heated oxygen sensor 1.
14 CHECK MASS AIR FLOW SENSOR
With CONSULT-II
Check ªMASS AIR FLOWº in ªDATA MONITORº mode with CONSULT-II.
at idling: 0.9 - 5.8 g´m/sec
at 2,500 rpm: 7.5 - 13.2 g´m/sec
With GST
Check mass air flow sensor signal in MODE 1 with GST.
at idling: 0.9 - 5.8 g´m/sec
at 2,500 rpm: 7.5 - 13.2 g´m/sec
OK or NG
OK©GO TO 16.
NG©GO TO 15.
15 CHECK CONNECTORS
Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or engine grounds.
Refer to EC-3143, EC-3151.
OK or NG
NG©Repair or replace it.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
KA24DE (EURO OBD)
Diagnostic Procedure
EC-3258

Diagnostic ProcedureNEEC0211
1 RETIGHTEN GROUND SCREWS
Loosen and retighten engine ground screws.
SEC309D
©GO TO 2.
2 CHECK INPUT SIGNAL CIRCUIT-1
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 64 and ground.
SEF173V
Resistance: Approximately 500 - 620 kW[at 25ÉC (77ÉF)]
It is necessary to use an ohmmeter which can measure more than 10 MW.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 64 and knock sensor terminal 1. Refer to wiring diagram.
Continuity should exist.
3. 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 P0327, P0328 KSKA24DE (EURO OBD)
Diagnostic Procedure
EC-3262

SEF956N
SEF335V
Component DescriptionNEEC0213The crankshaft position sensor (OBD) is located on the transaxle
housing facing the gear teeth (cogs) of the flywheel or drive plate.
It detects the fluctuation of the engine revolution.
The sensor consists of a permanent magnet, core and coil.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
This sensor is not directly used to control the engine system. It is
used only for the on board diagnosis.
ECM Terminals and Reference ValueNEEC0214Specification 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 (AC Voltage)
47 LCrankshaft position
sensor (OBD)[Engine is running]
+Warm-up condition
+Idle speed
[Engine is running]
+Engine speed is 2,000 rpm
On Board Diagnosis LogicNEEC0215
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0335
0335+The proper pulse signal from the crankshaft position sen-
sor (OBD) is not sent to ECM while the engine is running
at the specified engine speed.+Harness or connectors
(The crankshaft position sensor (OBD) circuit is
open.)
+Crankshaft position sensor (OBD)
+Dead battery
DTC P0335 CKP SENSOR (OBD)KA24DE (EURO OBD)
Component Description
EC-3264

Diagnostic ProcedureNEEC0218
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
SEC309D
©GO TO 2.
2 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect crankshaft position sensor (OBD) and ECM harness connectors.
SEF335V
2. Check continuity between ECM terminal 47 and terminal 1. Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E205, E33
+Harness connectors E101, M5
+Harness for open or short between crankshaft position sensor (OBD) and ECM
©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0335 CKP SENSOR (OBD)KA24DE (EURO OBD)
Diagnostic Procedure
EC-3267

4 CHECK GROUND CIRCUIT
1. Reconnect ECM harness connector.
2. Check harness continuity between crankshaft position sensor (OBD) terminal 2 and engine ground. Refer to the wiring
diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E205, E33
+Harness connectors E101, M5
+Harness for open or short between crankshaft position sensor (OBD) and ECM
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK SHIELD CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect harness connectors E205, E33.
3. Check harness continuity between harness connector E33 terminal 5 and ground. Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect harness connectors.
OK or NG
OK©GO TO 8.
NG©GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+Joint connector-3 (Refer to ªHARNESS LAYOUTº, EL section.)
+Harness for open or short between harness connector E33 and engine ground
©Repair open circuit or short to power in harness or connectors.
DTC P0335 CKP SENSOR (OBD)KA24DE (EURO OBD)
Diagnostic Procedure
EC-3268

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
(44)*2
49*1WCamshaft position sen-
sor (Position signal)[Engine is running]
+Warm-up condition
+Idle speedApproximately 2.5V
[Engine is running]
+Engine speed is 2,000 rpmApproximately 1.0V
67 W
Power supply for ECM[Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
72 W
117 W Current return[Engine is running]
+Idle speedBATTERY VOLTAGE
(11 - 14V)
*1: Model without NATS (Nissan Anti-Theft System)
*2: Model with NATS (Nissan Anti-Theft System)
On Board Diagnosis LogicNEEC0222
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0340
0340A) Either 1É or 180É signal is not sent to ECM for the
first few seconds during engine cranking.+Harness or connectors
(The camshaft position sensor circuit is open or
shorted.)
+Camshaft position sensor
+Starter motor (Refer to SC section.)
+Starting system circuit (Refer to SC section.)
+Dead (Weak) battery B) Either 1É or 180É signal is not sent to ECM often
enough while the engine speed is higher than the
specified engine speed.
C) The relation between 1É and 180É signal is not in
the normal range during the specified engine
speed.
DTC P0340 CMP SENSORKA24DE (EURO OBD)
ECM Terminals and Reference Value
EC-3271

Diagnostic ProcedureNEEC0225
1 CHECK STARTING SYSTEM
Does the engine turn over?
(Does the starter motor operate?)
YesorNo
Ye s©GO TO 2.
No©Check starting system. (Refer to SC section.)
2 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
SEC309D
©GO TO 3.
DTC P0340 CMP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3274

6 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between distributor (camshaft position sensor) terminal 6 and engine ground. Refer to the
wiring diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK©GO TO 8.
NG©GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-3
+Harness for open or short between camshaft position sensor and engine ground
©Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK CAMSHAFT POSITION SENSOR
1. Reconnect all harness connector disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 49 or (44)* and engine ground, ECM terminals 44, 48 or (49, 53)* and engine
ground.
SEC273D
*: Model with NATS (Nissan Anti-Theft System)
OK or NG
OK©GO TO 9.
NG©Replace camshaft position sensor.
DTC P0340 CMP SENSORKA24DE (EURO OBD)
Diagnostic Procedure
EC-3276

SEF484YE
On Board Diagnosis LogicNEEC1050The ECM monitors the switching frequency ratio of heated oxygen
sensor 1 and 2.
A three way catalyst with high oxygen storage capacity will indicate
a low switching frequency of heated oxygen sensor 2. As oxygen
storage capacity decreases, the heated oxygen sensor 2 switching
frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2
approaches a specified limit value, the three way catalyst malfunc-
tion is diagnosed.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0420
0420+Three way catalyst does not operate properly.
+Three way catalyst does not have enough oxygen stor-
age capacity.+Three way catalyst
+Exhaust tube
+Intake air leaks
+Injectors
+Injector leaks
+Spark plug
+Improper ignition timing
PBIB0566E
PBIB0567E
DTC Confirmation ProcedureNEEC1051NOTE:
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:
+Open engine hood before conducting following proce-
dure.
+Do not hold engine speed more than specified minutes
below.
With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDTC & SRT CONFIRMATIONº then ªSRT WORK SUP-
PORTº mode with CONSULT-II.
3) Start engine.
4) Rev engine up to 2,500 to 3,500 rpm and hold it for 3 consecu-
tive minutes then release then accelerator pedal completely.
If ªINCMPº of ªCATALYSTº changes to ªCMPLTº, go to step 7.
5) Wait 5 seconds at idle.
6) Rev engine up to 2,500 to 3,500 rpm and hold it until ªINCMPº
of ªCATALYSTº changes to ªCMPLTº. (It will take maximum of
approximately 5 minute.)
SEF560X
7) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
If the 1st trip DTC is detected, go to ªDIAGNOSTIC
PROCEDUREº, EC-3280. If not ªCOMPLTº stop engine and
cool down ªCOOLANT TEMP/SEº to less than 70ÉC (158ÉF)
and then retest from step 1).
DTC P0420 THREE WAY CATALYST
FUNCTION
KA24DE (EURO OBD)
On Board Diagnosis Logic
EC-3278

AEC876A
Overall Function CheckNEEC0242Use this procedure to check the overall function of the three way
catalyst. 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 voltmeters probes between ECM terminals 50 (Heated
oxygen sensor 1 signal), 56 (Heated oxygen sensor 2 signal)
and engine ground.
4) Keep engine speed at 2,000 rpm constant under no load.
5) Make sure that the voltage switching frequency (high & low)
between ECM terminal 56 and engine ground is much less
than that of ECM terminal 50 and engine ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 voltage switching frequency
B: Heated oxygen sensor 1 voltage switching frequency
This ratio should be less than 0.75.
If the ratio is greater than above, it means three way catalyst
does not operate properly.
NOTE:
If the voltage at terminal 50 does not switch periodically more
than 5 times within 10 seconds at step 4, perform trouble
diagnosis for DTC P0133 first. (See EC-3202.)
DTC P0420 THREE WAY CATALYST
FUNCTION
KA24DE (EURO OBD)
Overall Function Check
EC-3279