2007 INFINITI QX56 DTC

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Page 1373 of 3061

INFINITI QX56 2007  Factory Service Manual EC-290
< SERVICE INFORMATION >
DTC P0139, P0159 HO2S2
6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7. Check “HO2S2

Page 1374 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0139, P0159 HO2S2
EC-291
< SERVICE INFORMATION >
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Removal and InstallationINFOID:0000000003531791
HEATED OXYGEN SENSOR 2
Refer to EM-21.

Page 1375 of 3061

INFINITI QX56 2007  Factory Service Manual EC-292
< SERVICE INFORMATION >
DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
On Board Diagnosis LogicINFOID:0000000003531792
With the Air/Fuel Mixture

Page 1376 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
EC-293
< SERVICE INFORMATION >
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P O7. If it is difficult to start engine at step 6, the fuel injection system has a malfuncti

Page 1377 of 3061

INFINITI QX56 2007  Factory Service Manual EC-294
< SERVICE INFORMATION >
DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
Wiring Diagram
INFOID:0000000003531794
BANK 1
Specification data are reference values and are measured between each termi

Page 1378 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
EC-295
< SERVICE INFORMATION >
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Do not use ECM ground terminals when measuring input/output voltage. Doing so may result

Page 1379 of 3061

INFINITI QX56 2007  Factory Service Manual EC-296
< SERVICE INFORMATION >
DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measure

Page 1380 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
EC-297
< SERVICE INFORMATION >
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.