ECU INFINITI QX56 2011 Factory Service Manual

LOW TIRE PRESSURE WARNING CONTROL UNIT
WT-17
< ECU DIAGNOSIS INFORMATION >
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*: Power is supplied to the tire pressure receiver from the low tire pressure warning control unit.
DTC Inspection Priority ChartINFOID:0000000006225498
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority-
chart.
21
(G/R) Ground
Tire pressure receiver front
RH signal (sensitivity) InputIgnition switch ON Approx. 0.7 V
Ignition switch OFF 0 V
22
(BR/Y) Ground
Tire pressure receiver front
LH signal (sensitivity) InputIgnition switch ON Approx. 0.7 V
Ignition switch OFF 0 V
23
(V/W) Ground Tire pressure receiver rear
RH ground
Input Always 0 V
24
(R/B) Ground
Tire pressure receiver rear
LH ground Input Always 0 V
25
(W/L) Ground Tire pressure receiver front
RH ground Input Always 0 V
26
(BR/W) GroundTire pressure receiver front
LH ground
Input Always 0 V
32
(B) Ground Ground — Always 0 V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
Signal name Input/
Output
Priority Detected items (DTC)
1  U1000 CAN COMM CIRCUIT
 U1010 CONTROL UNIT (CAN)
2  C1704 LOW PRESSURE FL
 C1705 LOW PRESSURE FR
 C1706 LOW PRESSURE RR
 C1707 LOW PRESSURE RL
3  C1755 PR RECEIV COND FL
 C1756 PR RECEIV COND FR
 C1757 PR RECEIV COND RR
 C1758 PR RECEIV COND RL
4  C1708 [NO DATA] FL
 C1709 [NO DATA] FR
 C1710 [NO DATA] RR
 C1711 [NO DATA] RL
5  C1716 [PRESSDATA ERR] FL
 C1717 [PRESSDATA ERR] FR
 C1718 [PRESSDATA ERR] RR
 C1719 [PRESSDATA ERR] RL
7  C1728 RECEIVER ID NO REG
8  C1729 VHCL SPEED SIG ERR
9  C1750 [RECEIVER ERR] FL
 C1751 [RECEIVER ERR] FR
 C1752 [RECEIVER ERR] RR
 C1753 [RECEIVER ERR] RL
10  C1754 CONT UNIT (EEPROM)
Revision: 2010 May2011 QX56

WT-18
< ECU DIAGNOSIS INFORMATION >
LOW TIRE PRESSURE WARNING CONTROL UNIT
DTC Index
INFOID:0000000006225499
NOTE:
If some DTCs are displayed at the same time, refer to WT-17, "
DTC Inspection Priority Chart".
DTC Items (CONSULT-III screen terms) Reference
C1704 LOW PRESSURE FL
WT-31, "
DTC Logic"C1705 LOW PRESSURE FR
C1706 LOW PRESSURE RR
C1707 LOW PRESSURE RL
C1708 [NO DATA] FLWT-33, "
DTC Logic"C1709 [NO DATA] FR
C1710 [NO DATA] RRC1711 [NO DATA] RL
C1716 [PRESSDATA ERR] FL
WT-37, "
DTC Logic"C1717 [PRESSDATA ERR] FR
C1718 [PRESSDATA ERR] RR
C1719 [PRESSDATA ERR] RL
C1728 RECEIVER ID NO REGWT-39, "
DTC Logic"
C1729 VHCL SPEED SIG ERRWT-41, "DTC Logic"
C1750 [RECEIVER ERR] FL
WT-42, "
DTC Logic"C1751 [RECEIVER ERR] FR
C1752 [RECEIVER ERR] RR
C1753 [RECEIVER ERR] RL
C1754 CONT UNIT (EEPROM)WT-45, "
DTC Logic"
C1755 PR RECEIV COND FL
WT-47, "
DTC Logic"C1756 PR RECEIV COND FR
C1757 PR RECEIV COND RR
C1758 PR RECEIV COND RL
U1000 CAN COMM CIRCUITWT-49, "
DTC Logic"
U1010 CONTROL UNIT (CAN)WT-50, "DTC Logic"
Revision: 2010 May2011 QX56

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DRIVER CONTROLS
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CONTENTS
WIPER & WASHER
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
Precaution for Procedure without Cowl Top Cover ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Component Parts Location .................................. ......5
Component Description ............................................6
Washer Switch ..........................................................6
SYSTEM ..............................................................7
FRONT WIPER AND WASHER SYSTEM ............. ......7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Diagram ..............................................................
7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Description .........................................................
7
FRONT WIPER AND WASHER SYSTEM : Fail-
safe ...........................................................................
9
REAR WIPER AND WASHER SYSTEM ............... ....10
REAR WIPER AND WASHER SYSTEM : System
Diagram ...................................................................
10
REAR WIPER AND WASHER SYSTEM : System
Description ..............................................................
10
REAR WIPER AND WASHER SYSTEM :
Fail Safe .................................................................
12
HEADLAMP WASHER SYSTEM .......................... ....12
HEADLAMP WASHER SYSTEM : System Dia-
gram ........................................................................
13
HEADLAMP WASHER SYSTEM : System De-
scription ...................................................................
13
DIAGNOSIS SYSTEM (BCM) ............................14
COMMON ITEM ..................................................... ....14
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
14
WIPER .................................................................... ....15
WIPER : CONSULT-III Function (BCM - WIPER) ....15
DIAGNOSIS SYSTEM (IPDM E/R) ...................18
Diagnosis Description ..............................................18
CONSULT-III Function (IPDM E/R) .........................20
ECU DIAGNOSIS INFORMATION ..............23
BCM, IPDM E/R .................................................23
List of ECU Reference ......................................... ....23
WIRING DIAGRAM ......................................24
WIPER AND WASHER SYSTEM .....................24
Wiring Diagram .................................................... ....24
BASIC INSPECTION ...................................33
DIAGNOSIS AND REPAIR WORKFLOW ........33
Work Flow ............................................................ ....33
DTC/CIRCUIT DIAGNOSIS .........................35
WIPER AND WASHER FUSE ...........................35
Diagnosis Procedure ........................................... ....35
FRONT WIPER MOTOR LO CIRCUIT ..............36
Component Function Check ....................................36
Diagnosis Procedure ...............................................36
FRONT WIPER MOTOR HI CIRCUIT ...............37
Component Function Check ....................................37
Diagnosis Procedure ...............................................37
FRONT WIPER AUTO STOP SIGNAL CIR-
CUIT ..................................................................
38
Component Function Check ....................................38
Diagnosis Procedure ...............................................38
Revision: 2010 May2011 QX56

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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000006349813
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 ea ch 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 defogger 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

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< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
CONSULT-III Function (IPDM E/R)
INFOID:0000000006349815
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

BCM, IPDM E/RWW-23
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
BCM, IPDM E/R
List of ECU ReferenceINFOID:0000000006300464
ECU Reference
BCM BCS-33, "
Reference Value"
BCS-54, "Fail-safe"
BCS-56, "DTCInspectionPriorityChart"
BCS-57, "DTCIndex"
IPDM E/R
PCS-15, "
Reference Value"
PCS-21, "Fail-Safe"
PCS-22, "DTCIndex"
Revision: 2010 May2011 QX56

FRONT WIPER BLADEWW-69
< REMOVAL AND INSTALLATION >
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2. Insert the tip of new wiper refill (1) into the rear end of wiper blade (2). Slide the new wiper refill to the direction shown by the
arrow while pressing the new wiper refill onto the wiper blade
rear end.
NOTE:
 Insert the wiper refill to be held securely by tab of wiper bladeas shown in section.
 After the wiper refill is fully inserted, remove the holder
* (3).
*: Attached to service parts.
3. Insert the new wiper refill toward the direction shown by the mark “ ” until the stopper at the rear end of wiper refill fits in the
“SET” mark tab on wiper blade.
4. Untwist the twisted wiper refill at the rear end of wiper blade, if any.
5. Check the following items after replacing wiper refill.  Wiper refill is not twisted at all.
 Wiper refill thoroughly fits in the tab on wiper blade.
 Wiper refill is inserted from the proper direction.
NOTE: When the vertebra is detached.
 Insert the vertebra (1) into the wiper blade to the same bending direction.
 If a vertebra has a notch, fit it to a protrusion inside the wiper refill.
JMLIA1128ZZ
JMLIA1129ZZ
JPLIA1586ZZ
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< REMOVAL AND INSTALLATION >
LIGHT & RAIN SENSOR
LIGHT & RAIN SENSOR
Exploded ViewINFOID:0000000006220417
CAUTION:
When the light & rain sensor is removed from windshield, the light & rain sensor cannot be re-used.
Removal and InstallationINFOID:0000000006220418
REMOVAL
1. Disengage light & rain sensor cover fixing pawls with a remover tool, and then remove rain senor cover.
2. Disconnect light & rain sensor connector.
3. Disengage both sides metal spring clips, and remove the light & rain sensor from the windshield.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
 Surface of windshield should be cleaned.
 Never touch gel/adhesive of new part.
 Lock the metal spring clips and inst all the light & rain sensor securely.
1. Light & rain sensor connector 2. Light & rain sensor cover 3. Light & rain sensor
A. Metal spring clip
: Pawl
: Do not reuse
JMLIA0941ZZ
Revision: 2010 May2011 QX56