Infiniti M35/M45 Y50. Manual — part 629
DTC P0137, P0157 HO2S2
EC-989
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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 possible.)
The voltage should be above 0.78V at least once during this
procedure.
If the voltage can be confirmed in step 6, step 7 is not nec-
essary.
7.
Keep vehicle at idling for 10 minutes, then check the voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in D
position.
The voltage should be above 0.78V at least once during this
procedure.
8.
EC-993, "Diagnostic Procedure"
PBIB2054E
EC-990
[VK45DE]
DTC P0137, P0157 HO2S2
Wiring Diagram
NBS005EN
BANK 1
TBWT1020E
DTC P0137, P0157 HO2S2
EC-991
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
6
R/L
Heated oxygen sensor 2
heater (bank 1)
[Engine is running]
●
Engine speed: Below 3,600 rpm 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 load
0 - 1.0V
[Ignition switch: ON]
●
Engine: Stopped
[Engine is running]
●
Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
55
L/R
Heated oxygen sensor 2
(bank 1)
[Engine is running]
●
Revving engine from idle 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 load
0 - Approximately 1.0V
78
B
Sensor ground
(Heated oxygen sensor 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
EC-992
[VK45DE]
DTC P0137, P0157 HO2S2
BANK 2
TBWT1021E
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