Infiniti QX4 (R50). Manual — part 205
On Board Diagnosis Logic
NBEC0165
Malfunction is detected when the current amperage in the heated
oxygen sensor 2 heater (rear) circuit is out of the normal range.
[An improper voltage drop signal is sent to ECM through the heated
oxygen sensor 2 heater (rear).]
Possible Cause
NBEC0442
I
Harness or connectors
[The heated oxygen sensor 2 heater (rear) circuit is open or
shorted.]
I
Heated oxygen sensor 2 heater (rear)
SEF058Y
DTC Confirmation Procedure
NBEC0166
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.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is between 10.5V and 16V at idle.
WITH CONSULT-II
NBEC0166S01
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2)
Start engine.
3)
Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
4)
Stop vehicle and let engine idle for at least 6 seconds.
5)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-291.
WITH GST
NBEC0166S02
1)
Start engine.
2)
Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
3)
Stop vehicle and let engine idle for at least 6 seconds.
4)
Turn ignition switch “OFF” and wait at least 10 seconds.
5)
Start engine.
6)
Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
7)
Stop vehicle and let engine idle for at least 6 seconds.
8)
Select “MODE 3” with GST.
9)
If DTC is detected, go to “Diagnostic Procedure”, EC-291.
I
When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER (REAR) (BANK 1)/
(BANK 2)
On Board Diagnosis Logic
EC-287
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER (REAR) (BANK 1)/
(BANK 2)
DTC Confirmation Procedure (Cont’d)
EC-288
Wiring Diagram
NBEC0167
RIGHT BANK
NBEC0167S01
MEC953C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER (REAR) (BANK 1)/
(BANK 2)
Wiring Diagram
EC-289
LEFT BANK
NBEC0167S02
MEC954C
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER (REAR) (BANK 1)/
(BANK 2)
Wiring Diagram (Cont’d)
EC-290
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