2004 INFINITI QX56 Factory Service Manual

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Page 1201 of 3371

INFINITI QX56 2004 Factory Service Manual EC-10Revision: August 2007
INDEX FOR DTC
2004 QX56
FUEL SYS-RICH-B1 P0172 0172 2×EC-217
FUEL SYS-RICH-B2 P0175 0175 2×EC-217
HLR/C SOL FNCTN P1769 1769 1×AT-166
HLR/C SOL/CIRC P1767 1767 1×AT-163

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INFINITI QX56 2004 Factory Service Manual INDEX FOR DTC
EC-11
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EC
Revision: August 20072004 QX56
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Sel

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INFINITI QX56 2004 Factory Service Manual EC-12Revision: August 2007
INDEX FOR DTC
2004 QX56
DTC No. IndexUBS00GZ4
NOTE:
If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-

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INFINITI QX56 2004 Factory Service Manual INDEX FOR DTC
EC-13
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Revision: August 20072004 QX56P0304 0304 CYL 4 MISFIRE 2×EC-243
P0305 0305 CYL 5 MISFIRE 2×EC-243
P0306 0306 CYL 6 MISFIRE 2×EC-243
P0307 0307 CYL 7 MI

Page 1205 of 3371

INFINITI QX56 2004 Factory Service Manual EC-14Revision: August 2007
INDEX FOR DTC
2004 QX56
P1052 1052 A/F SEN1 HTR (B2) 2×EC-354
P1065 1065 ECM BACK UP/CIRCUIT 2×EC-361
P1121 1121 ETC ACTR 1×EC-365
P1122 1122 ETC FUNCTION/CIRC 1×EC-367

Page 1206 of 3371

INFINITI QX56 2004 Factory Service Manual INDEX FOR DTC
EC-15
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EC
Revision: August 20072004 QX56
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Sel

Page 1207 of 3371

INFINITI QX56 2004 Factory Service Manual EC-16Revision: August 2007
PRECAUTIONS
2004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UBS00GZ5
The Supplemental Res

EC-16Revision: August 2007
PRECAUTIONS
2004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UBS00GZ5
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NIN G:
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
On Board Diagnostic (OBD) System of Engine and A/TUBS00GZ6
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.
Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-68, "
HAR-
NESS CONNECTOR" .
Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.
Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.
Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionUBS00GZ7
Always use a 12 volt battery as power source.
Do not attempt to disconnect battery cables while engine is
running.
Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned OFF.
Before removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF 2 89 H

Page 1208 of 3371

INFINITI QX56 2004 Factory Service Manual PRECAUTIONS
EC-17
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Revision: August 20072004 QX56
Do not disassemble ECM.
If a battery cable is disconnected, the memory will return to
the ECM value.
The ECM will now start

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