2005 INFINITI FX35 Service Manual

sport mode jacking points spark plugs replace towing capacity brake pads replacement USB port

Load previous 8 pages

Page 1625 of 4731

INFINITI FX35 2005 Service Manual EC-232
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2005 July 2005 FX
BANK 2
TBWM0293E

Page 1626 of 4731

INFINITI FX35 2005 Service Manual DTC P0138, P0158 HO2S2 EC-233
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
C

Page 1627 of 4731

INFINITI FX35 2005 Service Manual EC-234
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2005 July 2005 FX
3. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follow

Page 1628 of 4731

INFINITI FX35 2005 Service Manual DTC P0138, P0158 HO2S2 EC-235
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
Component InspectionABS006ON
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Turn ignition switch

Page 1629 of 4731

INFINITI FX35 2005 Service Manual EC-236
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2005 July 2005 FX
6. Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as

Page 1630 of 4731

INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-237
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
DTC P0139, P0159 HO2S2PFP:226A0
Component DescriptionABS006OP
The heated oxygen sensor 2, aft

DTC P0139, P0159 HO2S2 EC-237
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
DTC P0139, P0159 HO2S2PFP:226A0
Component DescriptionABS006OP
The heated oxygen sensor 2, after three way catalyst 1, monitors the
oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeABS006OQ
Specification data are reference values.
On Board Diagnosis LogicABS006OR
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity before the three way catalyst 1 causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the switching response of the sen-
sor's voltage is faster than specified during the various driving condi-
tion such as fuel-cut.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
HO2S2 (B2)
Warm-up condition
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 minute
under no load. Revving engine from idle to 3,000 rpm
quickly. 0 - 0.3V
←→ Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2) LEAN
←→ RICH
SEF302U
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139
0139
(Bank 1) Heated oxygen sensor
2 circuit slow response It takes more time for the sensor to respond
between rich and lean than the specified time.
Harness or connectors
(The sensor circuit is open or shorted)
Heated oxygen sensor 2
Fuel pressure
Fuel injector
Intake air leaks
P0159
0159
(Bank 2)

Page 1631 of 4731

INFINITI FX35 2005 Service Manual EC-238
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS006OS
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OF

EC-238
[VQ35DE]
DTC P0139, P0159 HO2S2
Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS006OS
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:
For better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30 °C (32 to 86 °F).
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. Select “HO2S2 (B1) P0139” or “HO2S2 (B2) P0159” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-II.
8. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.
9. Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to EC-243, "
Diagnostic Procedure" .
If “CAN NOT BE DIAGNOSED” is displayed, perform the following.
a. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
b. Return to step 1.
Overall Function CheckABS006OT
Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st
trip DTC might not be confirmed.
WITH GST
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 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and ground.
SEF174Y
PBIB2374E

Page 1632 of 4731

INFINITI FX35 2005 Service Manual DTC P0139, P0159 HO2S2 EC-239
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
6. Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress

Load next 8 pages

Page: < prev 1-10 ... 1593-1600 1601-1608 1609-1616 1617-1624 1625-1632 1633-1640 1641-1648 1649-1656 1657-1664 ... 4736 next >

start stop button check transmission fluid warning lights tailgate compression ratio center console