2003 NISSAN X-TRAIL Service Repair Manual

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Page 633 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P0340 CMP SENSOR (PHASE)
EC-255
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Wiring DiagramEBS010Q4
TBWA0608E

Page 634 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-256
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DTC P0340 CMP SENSOR (PHASE)

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
D

Page 635 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P0340 CMP SENSOR (PHASE)
EC-257
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2. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.
R

Page 636 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-258
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DTC P0340 CMP SENSOR (PHASE)

3. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) harness
connector.

Page 637 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P0340 CMP SENSOR (PHASE)
EC-259
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6. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between CMP sensor

Page 638 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-260
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DTC P0340 CMP SENSOR (PHASE)

5. Check resistance as shown in the figure.
Removal and InstallationEBS010Q7
CAMSHAFT POSITION SENSOR (PHASE)
Refer to EM-53, "CAMSHAFT" .
Te

Page 639 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P0420 THREE WAY CATALYST FUNCTION
EC-261
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DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicEBS010Q8
The ECM monitors the switc

DTC P0420 THREE WAY CATALYST FUNCTION
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DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicEBS010Q8
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 ProcedureEBS010Q9
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 4,00 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
6. Start engine.
7. 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 10
8. Wait 5 seconds at idle.
SEF484YF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420Catalyst system efficiency
below threshold
Three way catalyst (manifold) does not operate
properly.
Three way catalyst (manifold) does not have
enough oxygen storage capacity.
Three way catalyst (manifold)
Exhaust tube
Intake air leaks
Fuel injector
Fuel injector leaks
Spark plug
Improper ignition timing
PBIB0566E

Page 640 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-262
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DTC P0420 THREE WAY CATALYST FUNCTION

9. Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
appr

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