1999 NISSAN PRIMERA Electronic Repair Manual

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Page 697 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Wiring DiagramNCEC0510
YEC782
: Detectable line for DTC
: Non-detectable line for DTC
ECM ECM RELAYEGR
VOLUME
CONTROL
VA LV E Refer to
EL-POWER. BATTERY
DTC P0403 EGR VOLUME CONTROL VALVE (CIRCUIT)
(I

Page 698 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Diagnostic ProcedureNCEC0511
1 CHECK POWER SUPPLY
1. Disconnect EGR volume control valve harness connector.
2. Turn ignition switch ªONº.
3. Check voltage between terminals 2, 5 and ground with CONS

Page 699 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Component InspectionNCEC0512EGR VOLUME CONTROL VALVENCEC0512S01With CONSULT-II
1) Disconnect EGR volume control valve harness connector.
2) Check resistance between the following terminals.
terminal 2

Page 700 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual On Board Diagnosis LogicNLEC0240The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 (front) and 2 (rear).
A three way catalyst with high oxygen storage capacity will indicate
a l

On Board Diagnosis LogicNLEC0240The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 (front) and 2 (rear).
A three way catalyst with high oxygen storage capacity will indicate
a low switching frequency of heated oxygen sensor 2 (rear). As
oxygen storage capacity decreases, the heated oxygen sensor 2
(rear) switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 (front) and
2 (rear) approaches a specified limit value, the three way catalyst
malfunction is diagnosed.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0420
0420IThree way catalyst does not operate properly.
IThree way catalyst does not have enough oxygen stor-
age capacity.IThree way catalyst
IExhaust tube
IIntake air leaks
IInjectors
IInjector leaks
ISpark plug
IImproper ignition timing
DTC Confirmation ProcedureNLEC0241CAUTION:
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.
With CONSULT-II
TESTING CONDITION:
IOpen engine hood before conducting following proce-
dure.
IDo not hold engine speed more than specified minutes
below.
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 3,000 500 rpm and hold it for 3 consecutive
minutes then release the accelerator pedal completely.
If ªCOMPLETEDº appears on the CONSULT-II screen, go to
step 7.
5) Wait 5 seconds at idle.
6) Rev engine up to 2,500 500 rpm and maintain it until ªINCMPº
of CATALYST changes to ªCMPLTº (it will take approximately
5 minutes.)
If not ªCMPLTº, stop engine and cool it down to less than 70ÉC
(158ÉF) and then retest from step 1.
7) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
8) Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-259.
SEF184UD
SEF847Y
SEF848Y
SEF560X
DTC P0420 THREE WAY CATALYST FUNCTIONQG16I18DE
On Board Diagnosis Logic
EC-258

Page 701 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Overall Function CheckNCEC0242Use 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 a

Page 702 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 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
Check for ignition timing.
Refer to TROUBLE D

Page 703 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 6 CHECK IGNITION SPARK
1. Disconnect ignition coil assembly from rocker cover.
2. Connect a known good spark plug to the ignition coil assembly.
3. Place end of spark plug against a suitable ground an

Page 704 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual DescriptionNCEC0248SYSTEM DESCRIPTIONNCEC0248S01
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed
EVAP can-
ister purge
controlEVAP canister purge volume

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