2007 INFINITI M35 Factory Service Manual

ignition stop start key radiator cap service indicator headlight aiming

Load previous 8 pages

Page 2537 of 4647

INFINITI M35 2007 Factory Service Manual EC-1008
[VK45DE]
DTC P0138, P0158 HO2S2
Revision: 2007 April2007 M35/M45
3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness conn

Page 2538 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0138, P0158 HO2S2
EC-1009
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
5. CHECK HEATED OXYGEN SENSOR 2
Refer to EC-1009, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
N

Page 2539 of 4647

INFINITI M35 2007 Factory Service Manual EC-1010
[VK45DE]
DTC P0138, P0158 HO2S2
Revision: 2007 April2007 M35/M45
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-4389

Page 2540 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0139, P0159 HO2S2
EC-1011
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
DTC P0139, P0159 HO2S2PFP:226A0
Component DescriptionNBS005F0
The heated oxygen sensor 2, after three

DTC P0139, P0159 HO2S2
EC-1011
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
DTC P0139, P0159 HO2S2PFP:226A0
Component DescriptionNBS005F0
The heated oxygen sensor 2, after three way catalyst (manifold),
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 ModeNBS005F1
Specification data are reference values.
On Board Diagnosis LogicNBS005F2
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 of the three way catalyst (manifold) 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)Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
Engine: After warming up
Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load0 - 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 responseIt 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 2541 of 4647

INFINITI M35 2007 Factory Service Manual EC-1012
[VK45DE]
DTC P0139, P0159 HO2S2
Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS005F3
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition swit

EC-1012
[VK45DE]
DTC P0139, P0159 HO2S2
Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS005F3
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. Open engine hood.
8. Select “HO2S2 (B1) P0139” or “HO2S2 (B2) P0159” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-II.
9. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.
10. Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, refer to EC-1017, "
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 CheckNBS005F4
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 55 [HO2S2 (B1) signal] or 74 [HO2S2 (B2) signal] and
ground.
SEF174Y
PBIB2374E

Page 2542 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0139, P0159 HO2S2
EC-1013
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
6. Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and relea

Page 2543 of 4647

INFINITI M35 2007 Factory Service Manual EC-1014
[VK45DE]
DTC P0139, P0159 HO2S2
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS005F5
BANK 1
TBWT1020E

Page 2544 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0139, P0159 HO2S2
EC-1015
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
D

Load next 8 pages

Page: < prev 1-10 ... 2505-2512 2513-2520 2521-2528 2529-2536 2537-2544 2545-2552 2553-2560 2561-2568 2569-2576 ... 4648 next >

air conditioning fuel tank capacity headlamp heater phone cabin filter