ECU INFINITI QX56 2008 Factory Service Manual

CCS
ICC UNITCCS-51
< ECU DIAGNOSIS >
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AAOIA0004GB
Revision: March 2010 2008 QX56

CCS-52
< ECU DIAGNOSIS >
ICC UNIT
AAOIA0005GB
Revision: March 20102008 QX56

CCS
ICC UNITCCS-53
< ECU DIAGNOSIS >
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AAOIA0006GB
Revision: March 2010 2008 QX56

CCS-54
< ECU DIAGNOSIS >
ICC UNIT
Fail Safe
INFOID:0000000001731894
When a malfunction occurs in ICC system, a chime sounds a beep, the system is released and ICC system
warning lamp in combination meter illuminates. System setting is not accepted when malfunction is detected.
AAOIA0007GB
Revision: March 2010 2008 QX56

CCS
ICC UNITCCS-55
< ECU DIAGNOSIS >
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Diagnostic Trouble Code (DTC) ChartINFOID:0000000001757410
× :Applicable
DTC
No. CONSULT-III screen terms ICC sys-
tem
warning lamp Fail-safe
Malfunctions detected where... Refer-
ence
page
Veh ic le-
to-vehi-cle dis-
tance
control mode Conven-
tional
(fixed
speed) cruise
control mode Brake as-
sist (with
preview
function)
11 CONTROL UNIT ×××× • ICC unit internal malfunctionCCS-22
12 VDC CONTROL UNIT ×××× • VDC malfunction
• Brake booster signal harness is
open or shorted CCS-23
20 CAN COMM CIRCUIT
×××× • ICC unit detected CAN communi-
cation malfunction CCS-24
31 POWER SUPPLY CIR1
×××× • ICC unit power supply voltage is
excessively low (less than 8V) CCS-25
34 POWER SUPPLY CIR2
×××× • ICC unit power supply voltage is
excessively high. CCS-25
41 VHCL SPEED SE CIRC
×××× • Wheel sensor malfunction
• ABS actuator and electric unit
(control unit) malfunction
• A/T vehicle speed sensor mal-
function
•TCM malfunction CCS-26
43 VDC/TCS/ABS CIRC
×××× • VDC/TCS/ABS system malfunc-
tion CCS-27
45 BRAKE SW/ STOP L SW
×××× • ICC brake switch or stop lamp
switch harness is open or shorted
• ICC brake switch or stop lamp switch is stuck to OFF
• ICC brake switch or stop lamp switch is stuck to ON CCS-28
46 OPERATION SW CIRC
××× • ICC steering switch harness or
spiral cable is open or shorted
• ICC steering switch malfunction CCS-30
74 LASER BEAM OFF CNTR
××ו Laser beam of ICC sensor is off
the aiming point CCS-31
90 STOP LAMP RLY FIX
××ו Normally open terminal of stop
lamp relay is stuck CCS-32
92 ECM CIRCUIT
×××× •ECM malfunction
• Accelerator pedal position sensor
malfunction
• ICC unit malfunction CCS-37
96 NP RANGE
××× • Transmission range switch har-
ness is open or shorted
• Transmission range switch mal- function
•TCM malfunction CCS-38
97 AT CIRCUIT
××× •TCM malfunctionCCS-39
98 GEAR POSITION ××× •TCM malfunction
• A/T input speed sensor malfunc-
tion
• A/T vehicle speed sensor mal- function CCS-40
Revision: March 2010
2008 QX56

CCS-56
< ECU DIAGNOSIS >
ICC UNIT
NOTE: DTC 55 will display when no malfunction is detected.102 LASER STAIN
××ו ICC sensor body window has
contamination CCS-41
103 LASER SENSOR FAIL
×× × • ICC sensor internal malfunctionCCS-42
104 LASER AIMING INCMP ×× × • Laser beam aiming of ICC sensor
is not adjusted CCS-43
107 LASER COMM FAIL
×× × • CAN data received by ICC sensor
is strange (from ICC unit, combi-
nation meter or ECM) CCS-44
109 LASER HIGH TEMP
×× × • Temperature around ICC sensor
is excessively high CCS-45
DTC
No. CONSULT-III screen terms ICC sys-
tem
warning lamp Fail-safe
Malfunctions detected where... Refer-
ence
page
Vehicle-
to-vehi-cle dis-
tance
control mode Conven-
tional
(fixed
speed) cruise
control mode Brake as-
sist (with
preview
function)
Revision: March 2010 2008 QX56

CHG-14
< COMPONENT DIAGNOSIS >
L TERMINAL CIRCUIT
L TERMINAL CIRCUIT
DescriptionINFOID:0000000001696188
The terminal “2” (L) circuit controls the charge warning lamp. The charge warning lamp illuminates when the
ignition switch is set to ON or START. When the generator is providing sufficient voltage with the engine run-
ning, the charge warning lamp will go off. If the c harge warning lamp illuminates with the engine running, a
malfunction is indicated.
Diagnosis ProcedureINFOID:0000000001696189
1.CHECK CHARGE WARNING LAMP CIRCUIT CONNECTION
Verify generator connector E205 terminal 2 is clean and tight.
Is the connection secure?
YES >> GO TO 2
NO >> Repair the connection. Confirm repair by per forming complete Starting/Charging system test.
Refer to Technical Service Bulletin.
2.CHECK CHARGE WARNING LAMP CIRCUIT
1. Disconnect generator connector E205.
2. Apply ground to generator harness connector E205 terminal 2 with the ignition switch in the ON position.
Does the charge lamp illuminate?
YES >> Check generator function. Refer to CHG-5, "Work Flow".
NO >> GO TO 3
3.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect the generator connector E205 and combination meter connector M24.
3. Check continuity between generator harness connector E205 (A) terminal 2 and combination meter harness connector M24
(B) terminal 6.
4. Check continuity between generator harness connector E205 (A) terminal 2 and ground.
Are the continuity results as specified?
YES >> Replace the combination meter. Refer to MWI-76, "Removal and Installation".
NO >> Repair the harness or connector. Charge lamp should illuminate
ALMIA0200ZZ
AB
Continuity
Connector Terminal Connector Terminal
E205 2M24 6Yes
A —
Continuity
Connector Terminal
E205 2Ground No
AWMIA0596ZZ
Revision: March 2010 2008 QX56

THERMOSTAT AND WATER PIPINGCO-23
< ON-VEHICLE REPAIR >
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3. Remove the engine room cover using power tool.
4. Disconnect the heater hose (heater core side).
5. Remove the heater hose bracket.
6. Disconnect the water cut valve connector.
7. Remove the water cut valve.
INSPECTION AFTER REMOVAL
• Place a thread so that it is caught
in the valve of the thermostat.
Immerse fully in a container filled with water. Heat while stirring.
• The valve opening temperature is the temperature at which the valve opens and falls from the thread.
• Continue heating. Check the full-open lift amount.
• After checking the full-open lift amount, lower the water tempera- ture and check the valve closing temperature.
Standard values:
INSTALLATION
Installation is in the reverse order of removal.
Installation of Thermostat
• Install the thermostat with the whole circumference of each flange
part fit securely inside the rubber ring as shown.
• Install the thermostat with the jiggle valve facing upwards.
Installation of Water Outlet Pipe and Heater Pipe
First apply a neutral detergent to the O- rings, then quickly insert the insertion parts of the water outlet pipe and
heater pipe into the installation holes.
INSPECTION AFTER INSTALLATION
• Check for leaks of the engine coolant. Refer to CO-10, "Inspection".
• Start and warm up the engine. Visually check for leaks of the engine coolant.
SLC252B
Thermostat
Valve opening temperature 80 - 84°C (176 - 183 ° F)
Full-open lift amount More than 10 mm/ 95°C (0.39 in/ 203° F)
Valve closing temperature 77°C (171 °F) or higher
KBIA2502E
Revision: March 2010 2008 QX56

DEF-1
DRIVER CONTROLS
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SECTION DEF
A
B
DEF
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CONTENTS
DEFOGGER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Flow ................................................ ......3
FUNCTION DIAGNOSIS ...............................4
REAR WINDOW DEFOGGER SYSTEM ........ .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................5
Component Description .............................................5
DIAGNOSIS SYSTEM (BCM) .............................6
COMMON ITEM ..................................................... ......6
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .......................................................
6
REAR WINDOW DEFOGGER ............................... ......6
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) ......................
6
CAN COMMUNICATION .....................................7
System Description ............................................. ......7
COMPONENT DIAGNOSIS ..........................8
REAR WINDOW DEFOGGER SWITCH ........ .....8
Description .......................................................... ......8
Component Function Check ......................................8
Diagnosis Procedure .................................................8
REAR WINDOW DEFOGGER RELAY ...............9
Description .......................................................... ......9
Component Function Check ......................................9
Diagnosis Procedure .................................................9
REAR WINDOW DEFOGGER POWER SUP-
PLY AND GROUND CIRCUIT ............................
10
Description .......................................................... ....10
Component Function Check ....................................10
Diagnosis Procedure ...............................................10
Component Inspection ......................................... ....11
DOOR MIRROR DEFOGGER LH .....................12
Description ...............................................................12
Component Function Check ....................................12
Diagnosis Procedure ...............................................12
Component Inspection .............................................13
DOOR MIRROR DEFOGGER RH .....................14
Description ...............................................................14
Component Function Check ....................................14
Diagnosis Procedure ...............................................14
Component Inspection .............................................15
ECU DIAGNOSIS .........................................16
BCM (BODY CONTROL MODULE) .................16
Reference Value .................................................. ....16
Wiring Diagram ........................................................17
SYMPTOM DIAGNOSIS ..............................25
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. ....
25
Diagnosis Procedure ........................................... ....25
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ...................................
26
Diagnosis Procedure ...............................................26
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ..............................................
27
Diagnosis Procedure ...............................................27
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .....................................
28
Diagnosis Procedure ...............................................28
PASSENGER SIDE DOOR MIRROR DEFOG-
GER DOES NOT OPERATE. ............................
29
Revision: March 2010 2008 QX56

DEF-6
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000001735606
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 subsystem selection items.
REAR WINDOW DEFOGGER
REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000001735607
DATA MONITOR
ACTIVE TEST
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-50, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
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 This function is not used even though it is displayed.
SystemSub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
Rear window defogger REAR DEFOGGER ××
BCM BCM ×
Monitor Item Description
REAR DEF SW Indicates [ON/OFF] condition of rear defogger switch.
IGN SW Indicates [ON/OFF] condition of ignition switch.
Test Item Description
REAR DEFOGGER This test is able to check rear window defogger operation. Rear window defogger operates when
“ON” on CONSULT-I
II screen is touched.
Revision: March 2010 2008 QX56