2011 INFINITI QX56 Factory Service Manual

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Page 73 of 5598

INFINITI QX56 2011 Factory Service Manual
ADP-64
< DTC/CIRCUIT DIAGNOSIS >
B2128 UART COMMUNICATION LINE
B2128 UART COMMUNICATION LINE
DescriptionINFOID:0000000006248348
Driver seat control unit performs UART communication with the automatic

ADP-64
< DTC/CIRCUIT DIAGNOSIS >
B2128 UART COMMUNICATION LINE
B2128 UART COMMUNICATION LINE
DescriptionINFOID:0000000006248348
Driver seat control unit performs UART communication with the automatic drive positioner control unit using 1
communication lines. Driver seat control unit receives t he operation signals of tilt & telescopic switch, door mir-
ror remote control switch, and the position signals of door mirror sensor from the automatic drive positioner
control unit and transmits the operation request signal.
DTC LogicINFOID:0000000006248349
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.STEP 1
Turn ignition switch ON.
>> GO TO 2.
2.PROCEDURE
Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected?
YES >> Perform diagnosis procedure. Refer to ADP-64, "DiagnosisProcedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006248350
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
3. Erase the DTC.
4. Perform DTC confirmation procedure. Refer to ADP-62, "
DTC Logic".
Is the DTC displayed again?
YES >> GO TO 2.
NO >> Check intermittent incident. Refer to GI-40, "
Intermittent Incident".
2.CHECK UART COMMUNICATION LINE CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and autom atic drive positioner control unit connector.
3. Check continuity between driver seat control uni t harness connector and automatic drive positioner con-
trol unit harness connector.
4. Check continuity between driver seat control unit harness connector and ground.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2128 UART COMM The communication between driver seat control unit
and auto drive positioner control unit is interrupted for
a period of time. UART communication line
(UART communication line is
open or shorted)
Driver seat control unit
Automatic drive positioner
control unit
Driver seat control unit Automatic drive positioner control unit Continuity
Connector Terminal Connector Terminal
B452 2 M75 8 Existed
Revision: 2010 May2011 QX56

Page 74 of 5598

INFINITI QX56 2011 Factory Service Manual
B2128 UART COMMUNICATION LINEADP-65
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Inci

Page 75 of 5598

INFINITI QX56 2011 Factory Service Manual
ADP-66
< DTC/CIRCUIT DIAGNOSIS >
B2130 EEPROM
B2130 EEPROM
DTC LogicINFOID:0000000006248351
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.STEP 1
Turn ignition switch ON.
>> GO TO 2.
2.STEP 2
Check

Page 76 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITADP-67
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
POWER SUPPLY AND GROUND CIRCUIT
DRIVER SEAT CONTROL UNIT
DRIVER SEAT CONTROL UNIT : Diagnosis Procedur

Page 77 of 5598

INFINITI QX56 2011 Factory Service Manual
ADP-68
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2.CHECK AUTOMATIC

Page 78 of 5598

INFINITI QX56 2011 Factory Service Manual
SLIDING SWITCHADP-69
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
SLIDING SWITCH
Component Function CheckINFOID:0000000006248357
1.CHECK FUNCTION
1. Select “SLIDE SW-FR”, “SLIDE S

Page 79 of 5598

INFINITI QX56 2011 Factory Service Manual
ADP-70
< DTC/CIRCUIT DIAGNOSIS >
SLIDING SWITCH
NO >> Repair or replace harness or connector.
3.CHECK SLIDING SWITCH
Refer to ADP-70, "
Component Inspection".
Is the inspection result normal?
YES >>

Page 80 of 5598

INFINITI QX56 2011 Factory Service Manual
RECLINING SWITCHADP-71
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
RECLINING SWITCH
Component Function CheckINFOID:0000000006248360
1.CHECK FUNCTION
1. Select “RECLN SW-FR”, “REC

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