Infiniti Q45 (FY33). Manual — part 165
Vehicle speed: More than 50 km/h (31 MPH)
B/FUEL SCHDL: 1.4 - 5.0 msec
Selector lever: Suitable position
If “TESTING” is not displayed after 5 minutes, retry
from step 2).
7) Make sure that “OK” is displayed after touching “SELF-
DIAG RESULTS”. If “NG” is displayed, refer to “DIAG-
NOSTIC PROCEDURE”, EC-192.
SEF353WA
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
1) Start engine and warm it up to normal operating tem-
perature.
2) Set voltmeter probes between ECM terminal
q
82
(B2),
q
83
(B1) (sensor signal) and ground.
3) Check the following with engine speed held at 2,000
rpm constant under no load.
I
Malfunction indicator lamp goes on more than 5 times
within 10 seconds in Diagnostic Test Mode II [HEATED
OXYGEN SENSOR 1 MONITOR (FRONT)]. See
EC-68.
4) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-192.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0133 (B1), P0153 (B2)
Heated Oxygen Sensor 1 (Front) (P0133: Bank
1), (P0153: Bank 2) (Response monitoring)
(Cont’d)
EC-189
BANK 1
TEC783
TROUBLE DIAGNOSIS FOR DTC P0133 (B1), P0153 (B2)
Heated Oxygen Sensor 1 (Front) (P0133: Bank
1), (P0153: Bank 2) (Response monitoring)
(Cont’d)
EC-190
BANK 2
TEC784
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0133 (B1), P0153 (B2)
Heated Oxygen Sensor 1 (Front) (P0133: Bank
1), (P0153: Bank 2) (Response monitoring)
(Cont’d)
EC-191
SEF833UA
SEF377U
SEF099P
SEF985Z
SEF395W
DIAGNOSTIC PROCEDURE
INSPECTION START
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground
screws.
Loosen and retighten heated oxygen sen-
sor 1 (front).
Tightening torque:
40 - 50 N
⋅
m (4.1 - 5.1 kg-m, 30 - 37
ft-lb)
CHECK EXHAUST AIR LEAK.
Start engine and run it at idle. Listen for an
exhaust air leak before three way catalyst.
OK
E
NG
Repair or replace.
CHECK FOR INTAKE AIR LEAK.
Start engine and run it at idle. Listen for an
intake air leak between the mass air flow
sensor and the intake manifold.
OK
E
NG
Repair or replace.
CLEAR THE SELF-LEARNING DATA
1. Start engine and warm it up to normal
operating temperature.
2. Select “SELF-LEARNING
CONT” in “WORK SUPPORT”
mode with CONSULT-II.
3. Clear the self-learning control
coefficient by touching “CLEAR”.
4. Run engine for at least 10 min-
utes at idle speed.
Are the 1st trip DTCs P0171,
P0174 or P0172, P0175
detected? Is it difficult to start
engine?
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
2. Turn ignition switch “OFF”.
3. Disconnect mass air flow sensor
harness connector, and restart
and run engine for at least 3
seconds at idle speed.
4. Stop engine and reconnect
mass air flow sensor harness
connector.
5. Make sure diagnostic trouble
code No. 0102 is displayed in
Diagnostic Test Mode II.
6. Erase the diagnostic test mode
II (Self-diagnostic results)
memory. Make sure diagnostic
trouble code No. 0505 is dis-
played in Diagnostic Test Mode
II.
7. Run engine for at least 10 min-
utes at idle speed.
Are the 1st trip DTCs 0115,
0210 or D114, 0209 detected?
Is it difficult to start engine?
No
E
Yes
Go to “TROUBLE DIAG-
NOSIS FOR DTC P0171,
P0172”, P0174, P0175,
EC-245, 251.
q
A
(Go to next page.)
TROUBLE DIAGNOSIS FOR DTC P0133 (B1), P0153 (B2)
Heated Oxygen Sensor 1 (Front) (P0133: Bank
1), (P0153: Bank 2) (Response monitoring)
(Cont’d)
H
H
H
H
H
H
EC-192
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