Infiniti Q45 (FY33). Manual — part 169
SEC027C
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5.
1) Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2) Start engine and run it for at least 6 seconds at idle
speed.
3) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-208.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine and run it for at least 6 seconds at idle
speed.
2) Turn ignition switch “OFF” and wait at least 5 seconds.
3) Restart engine and run it for at least 6 seconds at idle
speed.
4) Select “MODE 3” with GST.
5) If
DTC
is
detected,
go
to
“DIAGNOSTIC
PROCEDURE”, EC-208.
I
When using GST, “DIAGNOSTIC TROUBLE CODE CON-
FIRMATION PROCEDURE” should be performed twice as
much as when using CONSULT-II because GST cannot
display MODE 7 (1st trip DTC) concerning this diagnosis.
Therefore, using CONSULT-II is recommended.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0135 (B1), P0155 (B2)
Heated Oxygen Sensor 1 Heater (Front) (P0135:
Bank 1), (P0155: Bank 2) (Cont’d)
EC-205
BANK 1
TEC785
TROUBLE DIAGNOSIS FOR DTC P0135 (B1), P0155 (B2)
Heated Oxygen Sensor 1 Heater (Front) (P0135:
Bank 1), (P0155: Bank 2) (Cont’d)
EC-206
BANK 2
TEC786
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0135 (B1), P0155 (B2)
Heated Oxygen Sensor 1 Heater (Front) (P0135:
Bank 1), (P0155: Bank 2) (Cont’d)
EC-207
SEF054TI
SEF056TH
SEF646P
SEF409WA
SEF391UA
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxy-
gen sensor 1 (front) harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between terminal
q
3
and
ground.
Voltage: Battery voltage
OK
E
NG
Check the following.
I
Harness connectors
F1
,
E14
I
7.5A fuse
I
Harness for open or short
between heated oxygen
sensor 1 (front) and fuse
If NG, repair harness or
connectors.
CHECK GROUND CIRCUIT.
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between termi-
nal and sensor.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
E
NG
Repair harness or connec-
tors.
CHECK COMPONENT
[Heated oxygen sensor 1 heater (front)].
Refer to “COMPONENT INSPECTION” on
next page.
OK
E
NG
REPLACE HO2S1 (front).
1. Check HO2S1 (front)
harness protector color.
Black: Left bank (B1)
Blue: Right bank (B2)
2. Replace malfunctioning
HO2S1 (front)
Perform “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-117.
INSPECTION END
DTC
Terminals
Bank
(Harness
protector
color)
ECM
Sensor
P0135
17
1
B1
(Black)
P0155
16
1
B2 (Blue)
TROUBLE DIAGNOSIS FOR DTC P0135 (B1), P0155 (B2)
Heated Oxygen Sensor 1 Heater (Front) (P0135:
Bank 1), (P0155: Bank 2) (Cont’d)
H
H
H
H
H
EC-208
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