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