2007 INFINITI FX35 Service Manual

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Page 2417 of 4366

INFINITI FX35 2007 Service Manual DTC P0340 CAMSHAFT POSITION (CMP) SENSOR (PHASE) EC-1041
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Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured be

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INFINITI FX35 2007 Service Manual EC-1042
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DTC P0340 CAMSHAFT POSITION (CMP) SENSOR (PHASE)
Revision: 2006 July 2007 FX35/FX45
2. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground scr

Page 2419 of 4366

INFINITI FX35 2007 Service Manual DTC P0340 CAMSHAFT POSITION (CMP) SENSOR (PHASE) EC-1043
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5. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHO

Page 2420 of 4366

INFINITI FX35 2007 Service Manual EC-1044
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DTC P0340 CAMSHAFT POSITION (CMP) SENSOR (PHASE)
Revision: 2006 July 2007 FX35/FX45
Component InspectionNBS0047K
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sens

Page 2421 of 4366

INFINITI FX35 2007 Service Manual DTC P0420, P0430 THREE WAY CATALYST FUNCTION EC-1045
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Revision: 2006 July 2007 FX35/FX45
DTC P0420, P0430 THREE WAY CATALYST FUNCTIONPFP:20905
On Board

DTC P0420, P0430 THREE WAY CATALYST FUNCTION EC-1045
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DTC P0420, P0430 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicNBS004LH
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 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 A/F sensor 1 and heated oxygen sensor
2 approaches a specified limit value, the three way catalyst (mani-
fold) malfunction is diagnosed.
DTC Confirmation ProcedureNBS004LI
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:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
2. Start engine and warm it up to the normal operating tempera- ture.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70 °C
(158 °F).
If not, warm up engine and go to next step when “COOLAN
TEMP/S” indication reaches to 70 °C (158 °F).
7. Open engine hood.
PBIB2055E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420
(Bank 1)
Catalyst 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 injector
Fuel injector leaks
Spark plug
Improper ignition timing
P0430
0430
(Bank 2)
SEF189Y

Page 2422 of 4366

INFINITI FX35 2007 Service Manual EC-1046
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DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2006 July 2007 FX35/FX45
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
9. Rev eng

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INFINITI FX35 2007 Service Manual DTC P0420, P0430 THREE WAY CATALYST FUNCTION EC-1047
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Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS0047P
1. CHECK EXHAUST SYSTEM
Visually

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INFINITI FX35 2007 Service Manual EC-1048
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DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2006 July 2007 FX35/FX45
5. CHECK FUEL INJECTORS
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM

EC-1048
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DTC P0420, P0430 THREE WAY CATALYST FUNCTION
Revision: 2006 July 2007 FX35/FX45
5. CHECK FUEL INJECTORS
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42, 44, 63 and ground with CONSULT-II or tester.
Refer to Wiring Diagram for fuel injectors, EC-1312
.
OK or NG
OK >> GO TO 6.
NG >> Perform EC-1313, "
Diagnostic Procedure" .
6. CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure. NOTE:
Do not use CONSULT-II to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electri- cal discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for five seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion
as shown in the figure.
11. Crank engine for about three seconds, and check whether spark is generated between the spark plug and the grounded metal
portion.
CAUTION:
Do not approach to the spark plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20kV or more.
It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG
OK >> GO TO 10.
NG >> GO TO 7. Voltage: Battery voltage
PBIB1527E
Spark should be generated.
PBIB1482E
PBIB2325E

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