2009 INFINITI QX56 ECU

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Page 1775 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-448
< ECU DIAGNOSIS >[VK56DE]
ECM
AABIA0042GB
Revision: December 20092009 QX56

Page 1776 of 4171

INFINITI QX56 2009  Factory Service Manual 
ECM
EC-449
< ECU DIAGNOSIS > [VK56DE]
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AABIA0043GB
Revision: December 20092009 QX56

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INFINITI QX56 2009  Factory Service Manual 
EC-450
< ECU DIAGNOSIS >[VK56DE]
ECM
ABBIA0043GB
Revision: December 20092009 QX56

Page 1778 of 4171

INFINITI QX56 2009  Factory Service Manual 
ECM
EC-451
< ECU DIAGNOSIS > [VK56DE]
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AABIA0044GB
Revision: December 20092009 QX56

Page 1779 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-452
< ECU DIAGNOSIS >[VK56DE]
ECM
AABIA0045GB
Revision: December 20092009 QX56

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INFINITI QX56 2009  Factory Service Manual 
ECM
EC-453
< ECU DIAGNOSIS > [VK56DE]
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Fail-Safe ChartINFOID:0000000003771735
When the DTC listed below is detected, the EC
M enters fail-safe mode and the MIL lights u

Page 1781 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-454
< ECU DIAGNOSIS >[VK56DE]
ECM
 When there is an open circuit on MIL circuit, the ECM c
annot warn the driver by lighting up MIL when there
is malfunction on engine control system.
Therefore,

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INFINITI QX56 2009  Factory Service Manual 
ECM
EC-455
< ECU DIAGNOSIS > [VK56DE]
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DTC Inspection Priority ChartINFOID:0000000003771736
If some DTCs are displayed at the same time, per
form inspections one by one