Infiniti Q45. Manual — part 510
DTC P2A00, P2A03 A/F SENSOR 1
EC-679
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.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
2
OR
A/F sensor 1 heater
(bank 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 5V
16
W
A/F sensor 1 (bank 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 3.1V
35
R
Approximately 2.6V
56
R/L
Approximately 2.3V
75
BR
Approximately 2.3V
PBIB1584E
EC-680
DTC P2A00, P2A03 A/F SENSOR 1
BANK 2
TBWM1225E
DTC P2A00, P2A03 A/F SENSOR 1
EC-681
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.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
NBS002Y7
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
24
SB
A/F sensor 1 heater
(bank 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 5V
57
G/Y
A/F sensor 1 (bank 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 2.6V
58
G
Approximately 2.3V
76
L/W
Approximately 3.1V
77
GY
Approximately 2.3V
PBIB1584E
PBIB2417E
EC-682
DTC P2A00, P2A03 A/F SENSOR 1
2.
RETIGHTEN AIR FUEL RATIO (A/F) SENSOR 1
1.
Loosen and retighten the air fuel ratio (A/F) sensor 1.
>> GO TO 3.
3.
CHECK FOR INTAKE AIR LEAK
1.
Start engine and run it at idle.
2.
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
Tightening torque: 50 N-m (5.1 kg-m, 37 ft-lb)
PBIB3133E
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