2001 NISSAN X-TRAIL Service Repair Manual

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Page 585 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0340 CMP SENSOR (PHASE)
EC-235
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Wiring DiagramEBS00M5Q
TBWA0328E

Page 586 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-236
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DTC P0340 CMP SENSOR (PHASE)
Diagnostic Procedure
EBS00M5R
1. CHECK STARTING SYSTEM
Turn ignition switch to “START” position.
Ye s o r N o
Yes >> GO TO 2.
No >> Ch

Page 587 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0340 CMP SENSOR (PHASE)
EC-237
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4.DETECT MALFUNCTIONING PART
Check the following.
●Harness for open or short between ECM and camshaft position sen

Page 588 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-238
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DTC P0340 CMP SENSOR (PHASE)
Component Inspection
EBS00M5S
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sensor.
2. Disconnect camshaft position sensor

Page 589 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0420 THREE WAY CATALYST FUNCTION
EC-239
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DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicEBS00M5U
The ECM monitors the sw

DTC P0420 THREE WAY CATALYST FUNCTION
EC-239
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DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicEBS00M5U
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 and 2.
A three way catalyst (Manifold) 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 (Manifold)
malfunction is diagnosed.
DTC Confirmation ProcedureEBS00M5V
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
TESTING CONDITION:
●Open engine hood before conducting the following procedure.
●Do not hold engine speed for more than the specified minutes below.
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch ″OFF″ and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4. Let engine idle for one minute.
5. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
6. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely.
If “INCMP” of “CATALYST” changed to “COMPLT”, go to step 9
7. Wait 5 seconds at idle.
SEF484YF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420Catalyst system effi-
ciency below threshold
●Three way catalyst (Manifold) does not oper-
ate properly.
●Three way catalyst (Manifold) does not have
enough oxygen storage capacity.
●Three way catalyst (Manifold)
●Exhaust tube
●Intake air leaks
●Fuel injectors
●Fuel injector leaks
●Spark plug
●Improper ignition timing
PBIB0822E

Page 590 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-240
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DTC P0420 THREE WAY CATALYST FUNCTION
8. Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (I

Page 591 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0420 THREE WAY CATALYST FUNCTION
EC-241
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7. Make sure that the voltage switching frequency (high & low)
between ECM terminal 95 and en

Page 592 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-242
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DTC P0420 THREE WAY CATALYST FUNCTION
4. CHECK IGNITION TIMING
Check the following items. Refer to EC-73, "
Basic Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Follo

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