2011 INFINITI QX56 Factory Service Manual

Page 2401 of 5598

INFINITI QX56 2011  Factory Service Manual 
P0605 ECMEC-377
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
NO >> INSPECTION END
2.REPLACE ECM
Replace ECM. Refer to  EC-535, "
Removal and Installation".
>> INSPECTION END
Rev

Page 2402 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-378
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0607 ECM
P0607 ECM
DTC LogicINFOID:0000000006217877
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition swit

Page 2403 of 5598

INFINITI QX56 2011  Factory Service Manual 
P0611 ECM PROTECTIONEC-379
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0611 ECM PROTECTION
DescriptionINFOID:0000000006288344
This DTC is detected when the ECM protective func

Page 2404 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-380
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P062B ECM
P062B ECM
DescriptionINFOID:0000000006217879
This DTC is detected when the ECM-integrated injector dr
iver unit has a malfunction. For injector driv

Page 2405 of 5598

INFINITI QX56 2011  Factory Service Manual 
P0643 SENSOR POWER SUPPLYEC-381
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0643 SENSOR POWER SUPPLY
DTC LogicINFOID:0000000006217882
DTC DETECTION LOGIC
DTC CONFIRMATION PROC

Page 2406 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-382
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0643 SENSOR POWER SUPPLY
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair short to ground or short to power in harness or connectors.
3.CHECK CO

Page 2407 of 5598

INFINITI QX56 2011  Factory Service Manual 
P0850 PNP SWITCHEC-383
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0850 PNP SWITCH
DescriptionINFOID:0000000006217884
When the selector lever position is P or N, park/neut
ral

Page 2408 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-384
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0850 PNP SWITCH
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to 
EC-384, "Diagnosis Procedure".
NO >> INSPECTION END
5.PERFORM COMPONENT FUNCTI