2008 INFINITI QX56 Factory Service Manual

Page 1049 of 4083

INFINITI QX56 2008  Factory Service Manual DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)DLN-19
< FUNCTION DIAGNOSIS > [ATX14B]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
12. Move A/T selector lever to N position.
13. Turn 4WD shift switch to AUTO position.
1

Page 1050 of 4083

INFINITI QX56 2008  Factory Service Manual DLN-20
< FUNCTION DIAGNOSIS >[ATX14B]
DIAGNOSIS SYSTEM (T
RANSFER CONTROL UNIT)
4L SW [ON/OFF] ×–×4WD shift switch status is displayed.
(4L means 4LO of 4WD shift switch.)
N POSI SW TF [ON/OFF] ×

Page 1051 of 4083

INFINITI QX56 2008  Factory Service Manual DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)DLN-21
< FUNCTION DIAGNOSIS > [ATX14B]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
WORK SUPPORT
When there is no malfunction with transfer and 4WD sys tem, the following s

Page 1052 of 4083

INFINITI QX56 2008  Factory Service Manual DLN-22
< COMPONENT DIAGNOSIS >[ATX14B]
P1811 POWER SUPPLY CIRCUIT 
FOR TRANSFER CONTROL UNIT
COMPONENT DIAGNOSIS
P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
DescriptionINFOID:0000000001737101

Page 1053 of 4083

INFINITI QX56 2008  Factory Service Manual P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
DLN-23
< COMPONENT DIAGNOSIS > [ATX14B]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
• 10A fuses No. 26 located in fuse and fusible link box and No. 59 locat

Page 1054 of 4083

INFINITI QX56 2008  Factory Service Manual DLN-24
< COMPONENT DIAGNOSIS >[ATX14B]
P1802 – P1804, P1809 TRANSFER CONTROL UNIT
P1802 – P1804, P1809 TRANSFER CONTROL UNIT
DescriptionINFOID:0000000001737105
The transfer control unit controls t

Page 1055 of 4083

INFINITI QX56 2008  Factory Service Manual P1802 – P1804, P1809 TRANSFER CONTROL UNIT
DLN-25
< COMPONENT DIAGNOSIS > [ATX14B]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
  Without CONSULT-III
1. Perform the self-diagnosis and then eras e self-diagnosti

Page 1056 of 4083

INFINITI QX56 2008  Factory Service Manual DLN-26
< COMPONENT DIAGNOSIS >[ATX14B]
P1807 VEHICLE SPEED SENSOR (A/T)
P1807 VEHICLE SPEED SENSOR (A/T)
DescriptionINFOID:0000000001737108
The transmission control module (TCM) transmits the output s