warning INFINITI QX56 2004 Factory Service Manual

ACS-8
[ICC]
DESCRIPTION
Revision: August 20072004 QX56
Switch OperationEKS007RM
The system is operated by a master ON/OFF switch and four control switches, all mounted on the steering
wheel.
ICC System DisplayEKS007RN
No. Switch name Description
1 ACCEL/RES switch Resumes set speed or increases speed incrementally.
2 COAST/SET switch Sets desired cruise speed, reduces speed incrementally.
3 ON/OFF switch Master switch to activate the system.
4 CANCEL switch Deactivates system without erasing set speed.
5 DISTANCE switch Changes the following distance from: Long, Middle, Short.
SKIA5973E
WKIA1977E
No. Component Description
1 Set vehicle speed indicator Indicates the set vehicle speed.
2 Vehicle ahead detection indicator Indicates whether it detects a vehicle ahead.
3 Set distance indicatorDisplay the selected distance between vehicles set with the DISTANCE
switch.
4 Own vehicle indicator Indicates the base vehicle.
5 ON/OFF switch indicator lamp (Green) Indicates that the system is ON.
6Intelligent cruise control system warning
lamp (Orange)The light comes on if there is a malfunction in the ICC system.
7 Cruise set switch indicator lamp Indicates that the conventional cruise control mode is on.

ACS-30
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
ACTIVE TEST
CAUTION:
Do not perform the active test while driving. Active test cannot be started while ICC system warning
indicator is illuminated.
Active Test
1. Touch “ACTIVE TEST” on "SELECT DIAG MODE" screen.
2. Touch any of “ICC BUZZER 1”, “METER LAMP”, “STOP LAMP”
and “BOOSTER SOL/V 3” on "SELECT TEST ITEM" screen.
3. Touch “START”.
4. Active test screen will be shown.
GEAR
[1, 2, 3, 4, 5]××Indicates AT gear position read by ICC unit via
CAN communication (TCM transmits gear position
via CAN communication).
BUZZER O/P
[ON/OFF] ×Indicates [ON/OFF] status of ICC warning output.
ICC WARNING×NOTE:
This item is displayed but cannot be monitored.
VHCL SPD AT
[km/h] or [mph]
×Indicates vehicle speed calculated from AT vehicle
speed sensor by ICC unit via CAN communication
(TCM transmits AT vehicle speed sensor signal via
CAN communication).
PRESS SENS
[bar]×××Indicates brake fluid pressure value calculated
from signal voltage of pressure sensor.
PRESS SENS 2
[bar]××NOTE:
This item is displayed but cannot be monitored.
D RANGE SW
[ON/OFF]
××Indicates [ON/OFF] status of “D” position read by
ICC unit via CAN communication (TCM transmits
ON/OFF condition of “D” position via CAN commu-
nication).
AT OD OFF
[ON/OFF]×Indicates [ON/OFF] status of OD cancel output
under control.
NP RANGE SW
[ON/OFF]××Indicates PNP switch signal read by ICC unit via
CAN communication. (TCM transmits PNP switch
signal via CAN communication)
DISTANCE×NOTE:
This item is displayed but cannot be monitored.
RELATIVE SPD×NOTE:
This item is displayed but cannot be monitored.
STP LMP DRIVE
[ON/OFF]××Indicates [ON/OFF] status of brake hold relay drive
output. Monitored Item [unit] MAIN SIGNALSECU
INPUT
SIGNALSSELECTION
FROM MENUDescription
SKIA6195E

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-31
[ICC]
C
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ACS
Revision: August 20072004 QX56
ICC BUZZER 1

Touch “ON” and “OFF” to check that ICC warning chime oper-
ates as in the following chart.
METER LAMP

Start engine.

Touch “ON” and “OFF” to check that ICC system displays operate as required.

The following ICC lamps will illuminate at the same time,
CRUISE (orange), CRUISE (green), SET and ICC digital dis-
play.
STOP LAMP

Touch “ON” and “OFF” to check that the stop lamps operate as
in the following chart.
BOOSTER SOL/V 3

Touch any of “MODE 1”, “MODE 2”, “MODE 3” to check that fol-
lowing operation condition is caused by operating monitor and
brake pedal.

“START” is displayed 10 seconds after operation start. (Active
test is completed.)
BUZZER O/P ON OFF
Buzzer sound Beep Not activated
SKIA1228E
METER LAMP ON OFF
All ICC system dis-
playsFull illumination OFF
SKIA1231E
STP LMP DRIVE ON OFF
Stop lamp Lamp ON Lamp OFF
SKIA1232E
SKIA1233E

ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
Self-Diagnostic FunctionEKS007PI
WITH CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop vehicle, turn ignition switch OFF, then connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. With engine started, touch “START”, “ICC”, “SELF-DIAG RESULTS” on CONSULT-II screen in this order.
CAUTION:
If “ICC” cannot be shown after several attempts, the ICC unit may be malfunctioning and should
be replaced. Refer to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Self-diagnostic result appears on screen. If “NO DTC ···” is shown, check ICC warning lamp. If any mal-
function is indicated, GO TO step 5.
5. Refer to ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , perform appropriate check, and repair or
replace malfunctioning part as necessary.
6. Turn ignition switch OFF.
7. Start engine and touch “START”, “ICC”, “SELF-DIAG RESULT”, and “ERASE” on CONSULT-II.
CAUTION:
DTC of an existing malfunction will not erase. If the memory does not erase, go to step 5.
8. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
WITHOUT CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop the vehicle to start the self-diagnosis.
3. Turn ignition switch OFF.
4. Turn ignition switch ON, and wait 5 seconds. Press ACCEL/RES
switch 5 times, and then press COAST/SET switch 5 times all
within 5 seconds to start self-diagnosis.
CAUTION:

Do not start the engine.

Do not press the ICC ON/OFF switch ON.

When operation above is not completed within the 5 to 10
second window, DTC will not be displayed.

If self-diagnosis mode cannot be started after several
attempts, the ICC unit may be malfunctioning and should be
replaced. Refer to ACS-34, "
SELF-DIAGNOSIS BY ICC SYS-
TEM DISPLAY WILL NOT RUN" .
5. When self-diagnosis mode is started, DTCs are shown on set vehicle speed indicator.
PKIA0363J
WKIA1921E

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-33
[ICC]
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ACS
Revision: August 20072004 QX56
CAUTION:

DTC will disappear after 5 minutes.

When multiple malfunctions are detected, a maximum of 3 code numbers can be stored; the lat-
est malfunction will be displayed first.
6. Check ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC unit. Refer to ACS-33, "
Self-Diagnostic Erasing Method"
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn the ignition switch OFF.
2. Turn ignition switch ON and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and DISTANCE switch 5 times within a 10
second time period.
CAUTION:

Switch inputs must be received within a 10 second time period.

When operation is not completed within 10 seconds start again from step 1.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (orange) does not illuminate.
WKIA1922E

ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS007X2
×:Applicable
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)
11 CONTROL UNIT××××

ICC unit internal malfunctionACS-37
12 VDC CONTROL UNIT××××

VDC malfunction

Brake booster signal harness is
open or shortedACS-37
20 CAN COMM CIRCUIT××××
ICC unit detected CAN communi-
cation malfunctionACS-38
31 POWER SUPPLY CIR1××××
ICC unit power supply voltage is
excessively low (less than 8V)ACS-38
34 POWER SUPPLY CIR2××××
ICC unit power supply voltage is
excessively high.ACS-38
41 VHCL SPEED SE CIRC××××

Wheel sensor malfunction

ABS actuator and electric unit
(control unit) malfunction

AT vehicle speed sensor mal-
function

TCM malfunctionACS-39
43 VDC/TCS/ABS CIRC××××
VDC/TCS/ABS system malfunc-
tionACS-39
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 ONACS-40
46 OPERATION SW CIRC×××

ICC steering switch harness or
spiral cable is open or shorted

ICC steering switch malfunctionACS-41
74 LASER BEAM OFF CNTR×× ×
Laser beam of ICC sensor is off
the aiming pointACS-42
90 STOP LAMP RLY FIX×× ×
Normally open terminal of stop
lamp relay is stuckACS-43
92 ECM CIRCUIT××××

ECM malfunction

Accelerator pedal position sensor
malfunction

ICC unit malfunctionACS-47
96 NP RANGE×××

Park/neutral position switch har-
ness is open or shorted

Park/neutral position switch mal-
function

TCM malfunctionACS-48
97 AT CIRCUIT××
TCM malfunctionACS-48

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-37
[ICC]
C
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ACS
Revision: August 20072004 QX56
DTC 11 CONTROL UNITEKS007X3
1. DIAGNOSTIC CHECK
1. Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform ICC system running
test. Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITEKS008DH
1. DIAGNOSIS CHECK
With CONSULT-II

Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect connectors of ICC unit and ABS actuator and electric unit (control unit), and connect them
securely again. Then erase DTC. Then, perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and col-
lapsed terminals. If any malfunction is detected, repair applicable part. After repair, erase DTC
and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 3.
98 GEAR POSITION××

TCM malfunction

AT turbine revolution sensor mal-
function

AT vehicle speed sensor mal-
functionACS-49
102 LASER STAIN×× ×
ICC sensor body window has
contaminationACS-49
103 LASER SENSOR FAIL×× ×
ICC sensor internal malfunctionACS-50
104 LASER AIMING INCMP×× ×
Laser beam aiming of ICC sensor
is not adjustedACS-50
107 LASER COMM FAIL×× ×

CAN data received by ICC sen-
sor is strange (from ICC unit,
combination meter or ECM)ACS-51
109 LASER HIGH TEMP×× ×
Temperature around ICC sensor
is excessively highACS-51
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)

TROUBLE DIAGNOSIS FOR SYMPTOMS
ACS-55
[ICC]
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ACS
Revision: August 20072004 QX56
Symptom 4: The ICC System Is Not Cancelled When the Gear Is in Other Than
‘D’
EKS007XV
1. CHECK D RANGE SWITCH
With CONSULT-II
1. With data monitor, check that “D RANGE SW” operates normally.
OK or NG
OK >> Replace ICC unit and erase DTC. Refer to ACS-59, "ICC Unit" . Perform ICC system running
test, and then perform self-diagnosis of ICC system again.
NG >> GO TO 2.
2. CHECK CAN COMMUNICATION
With CONSULT-II
1. With CONSULT-II self-diagnosis, check “CAN COMM CIRCUIT”.
OK or NG
OK >> GO TO 3.
NG >> Refer to ACS-38, "
DTC 20 CAN COMM CIRCUIT" .
3. CHECK D RANGE SWITCH
1. With TCM data monitor, check that “D” position switch operates normally.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Perform ICC system running test, and then per-
form self-diagnosis of ICC system again.
NG >> After repairing or replacing malfunctioning part. Perform ICC system running test, and then per-
form self-diagnosis of ICC system again.
Symptom 5: Chime Does Not SoundEKS007XW
The chime may not sound occasionally in the following cases even if the distance from the vehicle ahead is
short:

When the speed difference from that of the vehicle ahead is small (both vehicles driving at similar speed).

When the vehicle ahead drives at faster speed (the actual distance is increasing).

When depressing the accelerator.

Chime does not sound when the vehicle is not driving.

Chime does not sound when the system does not detect any vehicle ahead. (Diagnose the conditions
under which the system is detecting the vehicle ahead and when the system is malfunctioning. If there is
any malfunction in detecting the vehicle ahead, refer to ACS-56, "
Symptom 7: The ICC System Frequently
Cannot Detect the Vehicle Ahead/The Detection Zone is Short" .)
1. CHECK ICC WARNING CHIME
With CONSULT-II
1. With active test, check that ICC warning chime operates normally.
OK or NG
OK >> Determine preceding vehicle detection status when malfunction occurred. If chime should have
sounded replace ICC unit. Refer to ACS-59, "
ICC Unit" . Perform ICC system running test, and
then perform self-diagnosis of ICC system again.
NG >> GO TO 2.

AT-42
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: August 20072004 QX56
Malfunction Indicator Lamp (MIL)UCS002CQ
DESCRIPTION
The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned “ON” with-
out the engine running. This is a bulb check.

If the MIL does not light up, refer to DI-31, "WARNING LAMPS"
.
2. When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
SEF 2 17 U

AV-2Revision: August 20072004 QX56 “VIEW” MODE ..................................................... 70
“HEADING” MODE .............................................. 71
“NEARBY DISPLAY ICONS” MODE ................... 71
“SAVE CURRENT LOCATION” MODE ............... 71
“ADJUST CURRENT LOCATION” MODE ........... 71
“AUTO RE-ROUTE” MODE ................................. 72
“AVOID AREA SETTINGS” MODE ...................... 72
“CLEAR MEMORY” MODE ................................. 72
“EDIT ADDRESS BOOK” MODE ........................ 73
“GPS INFORMATION” MODE ............................. 73
“QUICK STOP CUSTOMER SETTING” MODE ... 73
“SET AVERAGE SPEED” MODE ........................ 73
“TRACKING” MODE ............................................ 74
GUIDANCE VOLUME ......................................... 74
DISPLAY WITH PUSHED “TRIP” BUTTON ........ 74
TRIP 1 OR TRIP 2 ............................................... 75
FUEL ECONOMY ................................................ 75
MAINTENANCE .................................................. 75
ENGINE OIL OR TIRE ROTATION ..................... 75
TIRE PRESSURE ................................................ 76
WARNING INDICATIONS ................................... 76
CAN Communication System Description .............. 76
Component Parts Location ..................................... 77
Schematic ............................................................... 78
Wiring Diagram —NAVI— ....................................... 79
Schematic ............................................................... 86
Wiring Diagram — COMM — ................................. 87
Terminals and Reference Value for NAVI Control
unit .......................................................................... 90
Terminals and Reference Value for Display Control
unit .......................................................................... 92
Terminals and Reference Value for Display unit ..... 96
Terminals and Reference Value for AV Switch ....... 98
Terminals and Reference Value for BCM ................ 99
On Board Self-Diagnosis Function .......................101
DESCRIPTION ..................................................101
DIAGNOSIS ITEM .............................................101
Self-Diagnosis Mode (DCU) .................................101
OPERATION PROCEDURE ..............................101
SELF–DIAGNOSIS RESULT .............................103
Self-Diagnosis Mode (NAVI) .................................104
OPERATION PROCEDURE ..............................104
SELF–DIAGNOSIS RESULT .............................105
Confirmation/Adjustment Mode ............................107
OPERATION PROCEDURE ..............................107
DISPLAY DIAGNOSIS .......................................108
VEHICLE SIGNALS ...........................................108
NAVIGATION .....................................................109
DISPLAY DIAGNOSIS .......................................109
VEHICLE SIGNALS ...........................................110
HISTORY OF ERRORS ....................................110
DIAGNOSIS BY HISTORY OF ERRORS ..........110
NAVIGATION .....................................................112
CAN DIAG SUPPORT MONITOR ........................114
OPERATION PROCEDURE ..............................114
AV Switch Self-Diagnosis Function .......................115
Power Supply and Ground Circuit Check for NAVI
Control Unit ...........................................................116
Power Supply and Ground Circuit Check for Display Control Unit ...........................................................117
Power Supply and Ground Circuit Check for Display
Unit ........................................................................118
Power Supply and Ground Circuit Check for AV
Switch ................................................................... 120
Vehicle Speed Signal Check for NAVI Control Unit . 121
Vehicle Speed Signal Check for Display Control Unit . 122
Illumination Signal Check for NAVI Control Unit ... 123
Illumination Signal Check for Display Control Unit . 123
Ignition Signal Check for NAVI Control Unit .......... 123
Ignition Signal Check for Display Control Unit ...... 124
Reverse Signal Check for NAVI Control Unit ........ 124
Reverse Signal Check for Display Control Unit .... 124
AV Communication Line Check (Between Display
Control Unit and NAVI Control Unit) ...................... 125
Audio Communication Line Check (Between Dis-
play Control Unit and Audio Unit) .......................... 126
Display Communication Line Check (Between Dis-
play Control Unit and Display Unit) ....................... 128
AV Communication Line Check (Between Display
Control Unit and AV Switch) .................................. 130
CAN Communication Line Check ......................... 131
If NAVI Control Unit Detects That DVD-ROM Map
is Not Inserted ....................................................... 131
If NAVI Control Unit Detects That Inserted DVD-
ROM Map Malfunctioning or If It is Impossible to
Load Data from DVD-ROM Map ........................... 131
If Connection Between NAVI Control Unit and GPS
Antenna is Malfunctioning ..................................... 132
Operating Screen for Audio and A/C is Not Dis-
played When Showing NAVI Screen ..................... 132
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Bluish) ............................................ 134
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Reddish) ......................................... 135
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Yellowish) ....................................... 136
Color of RGB Image is Not Proper (All Screen Looks
Bluish) ................................................................... 137
Color of RGB Image is Not Proper (All Screen Looks
Reddish) ................................................................ 138
Color of RGB Image is Not Proper (All Screen Looks
Yellowish) .............................................................. 139
NAVI Screen is Rolling .......................................... 140
Guide Sound is Not Heard .................................... 142
Screen is Not Shown ............................................ 143
A/C Screen is Not Shown (NAVI Screen is Shown) . 143
FUEL ECONOMY Screen is Not Shown ............... 143
Average Fuel Economy Displayed is Not Shown (“
*** ” is Shown) ....................................................... 143
Distance to Empty Displayed is Not Shown (“ *** ”
is Shown) .............................................................. 144
Driving Distance or Average Speed Displayed is Not
Shown (“ *** ” is Shown) ....................................... 144
WARNING DOOR OPEN Screen is Not Shown ... 144
Unable to Operate All of AV Switches (Unable to
Start Self-Diagnosis) ............................................. 145
Audio Does Not Work ........................................... 145
Navigation System Does Not Activate .................. 145