2007 INFINITI FX35 Service Manual

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Page 1889 of 4366

INFINITI FX35 2007 Service Manual DTC P1421 COLD START CONTROL EC-513
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Revision: 2006 July 2007 FX35/FX45
DTC P1421 COLD START CONTROLPFP:23710
DescriptionNBS006S9
ECM controls ignition

DTC P1421 COLD START CONTROL EC-513
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Revision: 2006 July 2007 FX35/FX45
DTC P1421 COLD START CONTROLPFP:23710
DescriptionNBS006S9
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
On Board Diagnosis LogicNBS006SA
DTC Confirmation ProcedureNBS006SB
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.
If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Check that the “COOLAN TEMP/S” indication is between 4 °C
(39 °F) and 36 °C (97 °F).
If “COOLAN TEMP/S” indication is within the specified value, go
to the following step.
If “COOLANT TEMP/S” indication is out of the specified value,
cool engine down or warm engine up and go to step 1.
5. Start engine and let it idle for 5 minutes.
6. If 1st trip DTC is detected, go to EC-513, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureNBS006SC
1. PERFORM IDLE AIR VOLUME LEARNING
Perform EC-83, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 2 .
No >> Follow the instruction of Idle Air Volume Learning.
2. CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
Crushed intake air passage
Intake air passage clogging
OK or NG
OK >> GO TO 3.
NG >> Repair or replace malfunctioning part
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1421
1421 Cold start emission reduction
strategy monitoring ECM does not control ignition timing and engine
idle speed properly when engine is started with
prewarming up condition.
Lack of intake air volume
Fuel injection system
ECM
SEF174Y

Page 1890 of 4366

INFINITI FX35 2007 Service Manual EC-514
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DTC P1421 COLD START CONTROL
Revision: 2006 July 2007 FX35/FX45
3. CHECK FUEL INJECTION SYSTEM FUNCTION
Perform EC-304, "
DTC Confirmation Procedure" in DTC P0171, P0174 FUEL INJEC

Page 1891 of 4366

INFINITI FX35 2007 Service Manual DTC P1564 ICC STEERING SWITCH EC-515
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Revision: 2006 July 2007 FX35/FX45
DTC P1564 ICC STEERING SWITCHPFP:25551
Component DescriptionNBS003WW
ICC steeri

Page 1892 of 4366

INFINITI FX35 2007 Service Manual EC-516
[VQ35DE]
DTC P1564 ICC STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS003WZ
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn igni

Page 1893 of 4366

INFINITI FX35 2007 Service Manual DTC P1564 ICC STEERING SWITCH EC-517
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS003X0
TBWM0732E

Page 1894 of 4366

INFINITI FX35 2007 Service Manual EC-518
[VQ35DE]
DTC P1564 ICC STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gr

Page 1895 of 4366

INFINITI FX35 2007 Service Manual DTC P1564 ICC STEERING SWITCH EC-519
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Revision: 2006 July 2007 FX35/FX45
2. CHECK ICC STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch

Page 1896 of 4366

INFINITI FX35 2007 Service Manual EC-520
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DTC P1564 ICC STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
3. CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination

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