1999 NISSAN PRIMERA Electronic Repair Manual

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Page 1041 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual PROCEDURE FOR MALFUNCTION B AND CNCEC0223S02With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and run it for at least 2 seconds at idle s

Page 1042 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Wiring DiagramNCEC0224
YEC090A
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
Wiring Diagram
EC-242

Page 1043 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Diagnostic ProcedureNCEC0225
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 EL section.)
2 RETIGHTEN G

Page 1044 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E90, F73
IHarness for open or short between camshaft position sensor and ECM relay
IHarness for open or short between camshaft pos

Page 1045 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Component InspectionNCEC0226CAMSHAFT POSITION SENSORNCEC0226S011. Start engine and warm it up to normal operating temperature.
2. Check voltage between ECM terminals 75, 85 and engine
ground under the

Page 1046 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual On Board Diagnosis LogicNCEC0240The ECM monitors the switching frequency ratio of front and
heated oxygen sensor 2 (rear)s.
A three way catalyst with high oxygen storage capacity will indicate
a low s

On Board Diagnosis LogicNCEC0240The ECM monitors the switching frequency ratio of front and
heated oxygen sensor 2 (rear)s.
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 front and heated oxygen sensor 2
(rear)s 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 ProcedureNCEC0241CAUTION:
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 the following proce-
dure.
IDo not hold engine speed for more than the specified min-
utes 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.
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-SR-247.
SEF184UD
NEF247A
NEF248A
SEF560X
DTC P0420 THREE WAY CATALYST FUNCTIONSR20DE
On Board Diagnosis Logic
EC-246

Page 1047 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 1048 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 2 CHECK EXHAUST AIR LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust air leak before the three way catalyst.
SEF099P
OK or NG
OK©GO TO 3.
NG©Repair or replace.
3 CHECK INTAKE AIR LE

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