2006 INFINITI QX56 Factory Service Manual

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Page 1361 of 3383

INFINITI QX56 2006 Factory Service Manual EC-150Revision: November 2009
POWER SUPPLY AND GROUND CIRCUIT
2006 QX56
Ground Inspection UBS00H0H
Ground connections are very important to the proper operation of electrical and electronic circuits.

Page 1362 of 3383

INFINITI QX56 2006 Factory Service Manual DTC U1000, U1001 CAN COMMUNICATION LINEEC-151
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Revision: November 2009 2006 QX56
DTC U1000, U1001 CAN COMMUNICATION LINEPFP:23710
DescriptionUBS00H0I
CAN (Controller Area Netw

Page 1363 of 3383

INFINITI QX56 2006 Factory Service Manual EC-152Revision: November 2009
DTC U1000, U1001 CAN COMMUNICATION LINE
2006 QX56
Wiring DiagramUBS00H0L
BBWA1671E

Page 1364 of 3383

INFINITI QX56 2006 Factory Service Manual DTC U1000, U1001 CAN COMMUNICATION LINEEC-153
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Revision: November 2009 2006 QX56
Diagnostic ProcedureUBS00H0M
Go to LAN-3, "Precautions When Using CONSULT-II" .

Page 1365 of 3383

INFINITI QX56 2006 Factory Service Manual EC-154Revision: November 2009
DTC U1010 CAN COMMUNICATION
2006 QX56
DTC U1010 CAN COMMUNICATIONPFP:23710
DescriptionUBS00N8U
CAN (Controller Area Network) is a serial communication line for real time

Page 1366 of 3383

INFINITI QX56 2006 Factory Service Manual DTC U1010 CAN COMMUNICATIONEC-155
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Revision: November 2009 2006 QX56
Diagnostic ProcedureUBS00N8X
1. INSPECTION START
With CONSULT-II
1. Turn ignition switch ON.
2. Select

Page 1367 of 3383

INFINITI QX56 2006 Factory Service Manual EC-156Revision: November 2009
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
2006 QX56
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATERPFP:22693
DescriptionUBS00H71
SYSTEM DESCRIPTION
The ECM pe

EC-156Revision: November 2009
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
2006 QX56
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATERPFP:22693
DescriptionUBS00H71
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element at the specified range.
CONSULT-II Reference Value in Data Monitor ModeUBS00H72
Specification data are reference values.
On Board Diagnosis LogicUBS00H73
DTC Confirmation ProcedureUBS00H74
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 battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine and let it idle for at least 10 seconds.
3. If 1st trip DTC is detected, go to EC-160, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Sensor Input Signal to ECM ECM functionActuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Air fuel ratio (A/F) sensor 1
heater controlAir fuel ratio (A/F) sensor 1
heater
Mass air flow sensor Amount of intake air
MONITOR ITEM CONDITIONSPECIFICATION
A/F S1 HTR (B1)
A/F S1 HTR (B2)
Engine: After warming up, idle the engine 0 - 100%
DTC No. Trouble diagnosis nameDTC detecting conditionPossible cause
P0031
0031
(Bank 1) Air fuel ratio (A/F) sensor
1 heater control circuit
low The current amperage in the air fuel ratio (A/F)
sensor 1 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the air fuel ratio (A/F) sensor 1 heater.)
Harness or connectors
(The A/F sensor 1 heater circuit is
open or shorted.)
A/F sensor 1 heater
P0051
0051
(Bank 2)
P0032
0032
(Bank 1)
Air fuel ratio (A/F) sensor
1 heater control circuit
high The current amperage in the air fuel ratio (A/F)
sensor 1 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM
through the air fuel ratio (A/F) sensor 1 heater.)
Harness or connectors
(The A/F sensor 1 heater circuit is
shorted.)
A/F sensor 1 heater
P0052
0052
(Bank 2)
SEF058Y

Page 1368 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATEREC-157
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Revision: November 2009 2006 QX56
Wiring DiagramUBS00H75
BANK 1
BBWA2113E

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