2011 INFINITI QX56 ECU

DAS
ADAS CONTROL UNITDAS-443
< ECU DIAGNOSIS INFORMATION > [BSW]
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NOTE:
With the detection of “U1000” some syst ems do not perform the fail-safe operation.
A system controlling based on a signal received from the control unit performs fail-safe operation when the
communication with the ADAS control unit becomes inoperable.
U1500 145 CAM CAN CIR 2 ON F DAS-381
U1501 146 CAM CAN CIR 1 ON FDAS-382
U1502 147ICC SEN CAN COMM
CIR ON ON A, B, C, D, E
CCS-152
U1503 150 SIDE RDR L CAN CIR 2 ON G DAS-502
U1504 151 SIDE RDR L CAN CIR 1 ON GDAS-503
U1505 152 SIDE RDR R CAN CIR 2 ON GDAS-504
U1506 153 SIDE RDR R CAN CIR 1 ON GDAS-505
U1507 154LOST COMM (SIDE
RDR R) ON G
DAS-506
U1508 155LOST COMM (SIDE
RDR L) ON G
DAS-507
U150B 157 ECM CAN CIRC 3 ON ON ON A, B, E, F, G DAS-498
U150C 158 VDC CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, G DAS-499
U150D 159 TCM CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, GDAS-500
U150E 160 BCM CAN CIRC 3 ON ON ON A, B, E, F, GDAS-501
U150F 161 AV CAN CIRC 3 DAS-61
U1512 162 HVAC CAN CIRC3 ON FDAS-383
U1513 163 METER CAN CIRC 3 ON ON ON ON A, B, C, D, E, F, GDAS-508
U1514 164 STRG SEN CAN CIRC 3 ON ON ON A, B, C, D, E, GDAS-509
U1515 165 ICC SENSOR CAN
CIRC 3 ON ON A, B, C, D, E
CCS-155
U1516 166 CAM CAN CIRC 3 ON F DAS-385
U1517 167 APA CAN CIRC 3 ON A, B, ECCS-156
U1518 168 SIDE RDR L CAN CIRC 3 ON G DAS-510
U1519 169SIDE RDR R CAN CIRC
3 ON G
DAS-511
U1520 176 4WD CAN CIRC 3 ON ON ON A, B, C, D, E, F CCS-157
Systems for fail-safe
 A: Vehicle-to-vehicle distance control mode
 B: Conventional (fixed speed) cruise control mode
 C: Intelligent Brake Assist (IBA)
 D: Forward Collision Warning (FCW)
 E: Distance Control Assist (DCA)
 F: Lane Departure Warning (LDW)/Lane Departure Prevention (LDP)
 G: Blind Spot Warning (BSW)
DTC
CONSULT-III display Warning lamp Fail-safe
Reference
CONSULT-III On board
display
ICC system warning lamp
IBA OFF indicator lamp
Lane departure warning lamp BSW warning lamp
System
Revision: 2010 May2011 QX56

DAS-444
< ECU DIAGNOSIS INFORMATION >[BSW]
SIDE RADAR LH
SIDE RADAR LH
Reference ValueINFOID:0000000006223865
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-safeINFOID:0000000006223866
FAIL-SAFE CONTROL BY DTC
If a malfunction occurs in the side radar, ADAS control
unit cancels the control. Then the BSW warning lamp in
the combination meter illuminates.
Monitor Item Condition Value/Status
BEAM DISTANCE NOTE:
The item is displayed, but it is not used.
—
BEAM POSITION NOTE:
The item is displayed, but it is not used. —
SIDE RADAR MALF Side radar is normal.
Off
Side radar is malfunctioning. On
BLOCKAGE COND Side radar is not blocked. Off
Side radar is blocked. On
ACTIVATE OPE When the side radar is factory-default mode. (“Deactivate” condition) Off
When the side radar is normal usage mode. (“Activate” condition) On
VEHICLE DETECT Side radar does not detect a vehicle. Off
Side radar detects a vehicle. On
JSOIA0244ZZ
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
2
(B) Ground Ground — — 0 V
3
(Y) — ITS communication-L — — —
4
(L) — ITS communication-H — — —
5
(W/G) Ground Ignition power supply Input Ignition switch ON —
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(BR) Ground BSW indicator Output Approx. 2 sec. after ignition switch OFF
⇒ ON
(bulb check) 6 V
Revision: 2010 May2011 QX56

DAS
SIDE RADAR LHDAS-445
< ECU DIAGNOSIS INFORMATION > [BSW]
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TEMPORARY DISABLED STATUS AT BLOCKAGE
When the side radar is blocked, the operation is tempor arily cancelled. Then BSW warning lamp in combina-
tion meter blinks. Also, under the following conditions, the operation may be temporarily cancelled.
 The side radar may be blocked by temporary ambient c onditions such as splashing water, mist or fog.
 The blocked condition may also be caused by objects such as ice, frost or dirt obstructing the side radar.
DTC Inspection Priority ChartINFOID:0000000006223867
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006223868
× : Applicable
Priority Detected items (DTC)
1  U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
2  U0104: ADAS CAN CIR 1
 U0405: ADAS CAN CIR 2
3 C1B50: SIDE RDR MALFUNCTION
4  C1B51: BSW/BSI IND SHORT CIR
 C1B52: BSW/BSI IND OPEN CIR
 C1B55: RADAR BLOCKAGE
DTC BSW warning lamp Fail-safe Reference page
C1B50 SIDE RDR MALFUNCTION ON ×DAS-478
C1B51 BSW/BSI IND SHORT CIR ON ×DAS-479
C1B52 BSW/BSI IND OPEN CIR ON ×DAS-480
C1B55 RADAR BLOCKAGE Blink ×DAS-484
U1000 CAN COMM CIRCUIT ON ×DAS-485
U1010 CONTROL UNIT (CAN) ON ×DAS-488
U0104 ADAS CAN CIR1 ON ×DAS-490
U0405 ADAS CAN CIR2 ON ×DAS-495
Revision: 2010 May2011 QX56

DAS-446
< ECU DIAGNOSIS INFORMATION >[BSW]
SIDE RADAR RH
SIDE RADAR RH
Reference ValueINFOID:0000000006223869
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-safeINFOID:0000000006223870
FAIL-SAFE CONTROL BY DTC
Monitor Item Condition Value/Status
BEAM DISTANCE NOTE:
The item is displayed, but it is not used.
—
BEAM POSITION NOTE:
The item is displayed, but it is not used. —
SIDE RADAR MALF Side radar is normal.
Off
Side radar is malfunctioning. On
BLOCKAGE COND Side radar is not blocked. Off
Side radar is blocked. On
ACTIVATE OPE When the side radar is factory-default mode. (“Deactivate” condition) Off
When the side radar is normal usage mode. (“Activate” condition) On
VEHICLE DETECT Side radar does not detect a vehicle. Off
Side radar detects a vehicle. On
JSOIA0244ZZ
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
1
(B/Y) Ground Right/Left switching signal Input — 0 V
2
(B) Ground Ground — — 0 V
3
(Y) — ITS communication-L — — —
4
(L) — ITS communication-H — — —
5
(W/G) Ground Ignition power supply Input Ignition switch ON —
6
(L/R) Ground BSW indicator Output Approx. 2 sec. after ignition switch OFF
⇒ ON
(bulb check) 6 V
Revision: 2010 May2011 QX56

DAS
SIDE RADAR RHDAS-447
< ECU DIAGNOSIS INFORMATION > [BSW]
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If a malfunction occurs in the side radar, ADAS control unit cancels the control. Then the BSW warning lamp in
the combination meter illuminates.
TEMPORARY DISABLED STATUS AT BLOCKAGE
When the side radar is blocked, the operation is tempor arily cancelled. Then BSW warning lamp in combina-
tion meter blinks. Also, under the following conditions, the operation may be temporarily cancelled.
 The side radar may be blocked by temporary ambient c onditions such as splashing water, mist or fog.
 The blocked condition may also be caused by objects such as ice, frost or dirt obstructing the side radar.
DTC Inspection Priority ChartINFOID:0000000006223871
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006223872
× : Applicable
Priority Detected items (DTC)
1  U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
2  U0104: ADAS CAN CIR 1
 U0405: ADAS CAN CIR 2
3 C1B50: SIDE RDR MALFUNCTION
4  C1B51: BSW/BSI IND SHORT CIR
 C1B52: BSW/BSI IND OPEN CIR
 C1B55: RADAR BLOCKAGE
DTC BSW warning lamp Fail-safe Reference page
C1B50 SIDE RDR MALFUNCTION ON ×DAS-478
C1B51 BSW/BSI IND SHORT CIR ON ×DAS-479
C1B52 BSW/BSI IND OPEN CIR ON ×DAS-480
C1B55 RADAR BLOCKAGE Blink ×DAS-484
U1000 CAN COMM CIRCUIT ON ×DAS-486
U1010 CONTROL UNIT (CAN) ON ×DAS-488
U0104 ADAS CAN CIR1 ON ×DAS-490
U0405 ADAS CAN CIR2 ON ×DAS-495
Revision: 2010 May2011 QX56

DEF-1
DRIVER CONTROLS
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SECTION DEF
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CONTENTS
DEFOGGER
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Component Parts Location .................................. ......5
Component Description .............................................5
SYSTEM ..............................................................6
System Diagram .................................................. ......6
System Description ...................................................6
DIAGNOSIS SYSTEM (BCM) .............................7
COMMON ITEM ..................................................... ......7
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .......................................................
7
REAR WINDOW DEFOGGER ............................... ......8
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) ......................
8
DIAGNOSIS SYSTEM (IPDM E/R) .....................10
Diagnosis Description ......................................... ....10
CONSULT-III Function (IPDM E/R) .........................12
ECU DIAGNOSIS INFORMATION ..............15
BCM, IPDM E/R .............................................. ....15
List of ECU Reference ........................................ ....15
WIRING DIAGRAM ......................................16
REAR WINDOW DEFOGGER SYSTEM ........ ....16
Wiring Diagram ................................................... ....16
BASIC INSPECTION ...................................24
DIAGNOSIS AND REPAIR WORK FLOW .......24
Work Flow ............................................................ ....24
DTC/CIRCUIT DIAGNOSIS .........................25
REAR WINDOW DEFOGGER SWITCH ...........25
Component Function Check ................................ ....25
Diagnosis Procedure ...............................................25
REAR WINDOW DEFOGGER RELAY .............26
Description ...............................................................26
Component Function Check ....................................26
Diagnosis Procedure ...............................................26
REAR WINDOW DEFOGGER ..........................27
Description ...............................................................27
Component Function Check ....................................27
Diagnosis Procedure ...............................................27
DOOR MIRROR DEFOGGER ...........................29
Description ...............................................................29
Component Function Check ....................................29
Diagnosis Procedure ...............................................29
DRIVER SIDE DOOR MIRROR DEFOGGER ...30
Description ...............................................................30
Component Function Check ....................................30
Diagnosis Procedure ...............................................30
PASSENGER SIDE DOOR MIRROR DEFOG-
GER ...................................................................
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Description ...............................................................31
Component Function Check ....................................31
Diagnosis Procedure ...............................................31
WIPER DEICER RELAY ...................................32
Component Function Check ....................................32
Diagnosis Procedure ...............................................32
Component Inspection .............................................33
WIPER DEICER ................................................34
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)DEF-7
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000006349773
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate each device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

DEF-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
CONSULT-III Function (IPDM E/R)
INFOID:0000000006349777
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with IPDM E/R.
SELF DIAGNOSTIC RESULT
Refer to PCS-22, "DTCIndex".
DATA MONITOR
Monitor item
Oil pressure warning lamp does not operate Perform auto active test.
Does the oil pressure warning
lamp blink?YES
 Harness or connector be-
tween IPDM E/R and oil
pressure switch
 Oil pressure switch
IPDM E/R
NO  CAN communication signal
between IPDM E/R and
BCM
 CAN communication signal
between BCM and combi-
nation meter
 Combination meter
Symptom Inspection contents Possible cause
Diagnosis mode Description
Ecu Identification Allows confirmation of IPDM E/R part number.
Self Diagnostic Result Displays the diagnosis results judged by IPDM E/R.
Data Monitor Displays the real-time input/output data from IPDM E/R input/output data.
Active Test IPDM E/R can provide a drive signal to electronic components to check their operations.
CAN Diag Support Monitor The results of transmit/receive diagnosis of CAN communication can be read.
Monitor Item [Unit] MAIN SIG-
NALS Description
RAD FAN REQ
[1/2/3/4] ×Displays the value of the cooling fan speed request signal received from ECM via
CAN communication.
AC COMP REQ
[Off/On] ×Displays the status of the A/C compressor request signal received from ECM via
CAN communication.
TA I L & C L R R E Q
[Off/On] ×
Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[Off/On] ×Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[Off/On] ×Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[Off/On] ×Displays the status of the front fog light request signal received from BCM via
CAN communication.
FR WIP REQ
[Stop/1LOW/Low/Hi] ×
Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P] ×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[Off/BLOCK] ×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
IGN RLY1 -REQ
[Off/On] Displays the status of the ignition switch ON signal received from BCM via CAN
communication.
IGN RLY
[Off/On] ×
Displays the status of the ignition relay judged by IPDM E/R.
Revision: 2010 May2011 QX56