2007 INFINITI QX56 Factory Service Manual

Page 1673 of 3061

INFINITI QX56 2007  Factory Service Manual EC-590
< SERVICE INFORMATION >
DTC P2A00, P2A03 A/F SENSOR 1
Wiring Diagram
INFOID:0000000003532145
BANK 1
Specification data are reference values and are measured between each terminal and ground.
Pu

Page 1674 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P2A00, P2A03 A/F SENSOR 1
EC-591
< SERVICE INFORMATION >
C
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EC
N
P O
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the

Page 1675 of 3061

INFINITI QX56 2007  Factory Service Manual EC-592
< SERVICE INFORMATION >
DTC P2A00, P2A03 A/F SENSOR 1
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
C

Page 1676 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P2A00, P2A03 A/F SENSOR 1
EC-593
< SERVICE INFORMATION >
C
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EC
N
P O
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis Proced

Page 1677 of 3061

INFINITI QX56 2007  Factory Service Manual EC-594
< SERVICE INFORMATION >
DTC P2A00, P2A03 A/F SENSOR 1
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace.
4.CLEAR THE SELF-LEARNING

Page 1678 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P2A00, P2A03 A/F SENSOR 1
EC-595
< SERVICE INFORMATION >
C
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EC
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6.CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between A/F sensor 1

Page 1679 of 3061

INFINITI QX56 2007  Factory Service Manual EC-596
< SERVICE INFORMATION >
DTC P2A00, P2A03 A/F SENSOR 1
OK >> GO TO 10.
NG >> GO TO 11.
10.CHECK INTERMITTENT INCIDENT
Perform EC-138
.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace.
11 .REPLA

Page 1680 of 3061

INFINITI QX56 2007  Factory Service Manual ASCD BRAKE SWITCH
EC-597
< SERVICE INFORMATION >
C
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EC
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ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000003532148
When the brake pedal is depressed, ASCD brake switch is