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
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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

CCS
INTELLIGENT CRUISE CONTROL SYSTEM SYMPTOMSCCS-57
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SYMPTOM DIAGNOSIS
INTELLIGENT CRUISE CONTROL SYSTEM SYMPTOMS
Symptom ChartINFOID:0000000001744721
Symptoms Reference page
Operation ON/OFF switch does not switch ON.
CCS-58
ON/OFF switch does not switch OFF.CCS-58
Cruise does not function for setting (powering functions).CCS-59
CANCEL switch does not function.CCS-60
RESUME does not function.CCS-60
The set speed does not increase.CCS-60
The set distance to the vehicle ahead cannot be changed.CCS-60
The ICC is not cancelled when the gear is in "N".CCS-61
Display/ChimeThe ICC system display does not appear.
Check combination meter. Refer to
MWI-24, "Diagnosis Description"
Chime does not function. CCS-62
ControlDriving force is hunting. CCS-63
Function to detect the vehicle aheadThe system frequently cannot detect the vehicle ahead.
CCS-64
The distance to detect the vehicle ahead is short.CCS-64
The system misidentifies a vehicle even though there is
no vehicle ahead.•Refer to CCS-5, "
LASER BEAM
AIMING ADJUSTMENT : Out-
line of Laser Beam Aiming Ad-
justment Procedure"
•Refer to CCS-8, "ACTION TEST
: ICC System Running Test"
The system misidentifies a vehicle in the next lane.
•Refer to CCS-5, "
LASER BEAM
AIMING ADJUSTMENT : Out-
line of Laser Beam Aiming Ad-
justment Procedure"
•Refer to CCS-8, "ACTION TEST
: ICC System Running Test"
The system does not detect a vehicle at all.
CCS-65
Revision: March 2010 2008 QX56

CCS-58
< SYMPTOM DIAGNOSIS >
MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN OFF
MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN
OFF
Diagnosis ProcedureINFOID:0000000001744722
NOTE:
• *1: The ICC system display in the co mbination meter does not illuminate.
• *2: The ICC system display in the combination meter remains powered.
1.CHECK ON/OFF SWITCH
With "DATA MONITOR", check that ON/OFF switch operates normally.
Does ON/OFF switch operate normally?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ICC unit harness connectors.
3. Check connector housing for disconnected, loose, bent, and collapsed terminals.
Does the ICC unit pass inspection?
YES >> GO TO 3
NO >> • Poor connector connection. • Repair ICC unit connector. Erase DTC and perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test".
3.DIAGNOSIS CHECK
Perform self-diagnosis.
Is "CAN COMM CIRCUIT" indicated?
YES >> Refer to CCS-24, "DTC 20 CAN COMM CIRCUIT".
NO >> Refer to CCS-30, "
DTC 46 OPERATION SW CIRC".
Revision: March 2010 2008 QX56

CCS
ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)
CCS-59
< SYMPTOM DIAGNOSIS >
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ICC SYSTEM CANNOT BE SET (M AIN SWITCH TURNS ON/OFF)
Diagnosis ProcedureINFOID:0000000001744723
The ICC cannot be set in the following cases.
• When the vehicle speed is not in range of approx. 40 km/h (25 MPH) to 144 km/h (89 MPH).
• When the selector lever is in "N".
• While the brake is in operation.
• When the windshield wipers are operating.
1.CHECK CAUSE OF AUTOMATIC CANCELLATION
1. With “CAUSE OF AUTO-CANCEL” in "WORK SUPPORT ", check if any cause of cancellation exists.
Is there a cause of cancellation stored?
YES >> • Cancel with appropriate cause. • For causes A, B, or C, go to specified diagnosis.A: “OPE SW VOLT CIRC” : Refer to CCS-30, "
DTC 46 OPERATION SW CIRC".
B: “VHCL SPD UNMATCH” : Refer to CCS-26, "
DTC 41 VHCL SPEED SE CIRC".
C: “IGN LOW VOLT” : Refer to CCS-25, "
DTC 31 POWER SUPPLY CIR1, DTC 34
POWER SUPPLY CIR2".
NO >> GO TO 2
2.PERFORM SELF-DIAGNOSIS
1. Perform -self-diagnosis to check for malfunctioning items.
Does the ICC have any DTC’s stored?
YES >> Repair or replace as necessary, erase DT C. Perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test".
NO >> GO TO 3
3.CHECK SWITCHES AND VEHICLE SPEED SIGNAL
1. With "DATA MONITOR", check that the followi ng switches and vehicle speed signal operate normally.
A: VHCL SPEED SE B: NP RANGE SW
C: BRAKE SW D: SET/COAST SW
Do the monitor items display properly?
YES >> Replace ICC unit and erase DTC. Refer to CCS-70, "ICC Unit". Perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> • A: Refer to CCS-26, "
DTC 41 VHCL SPEED SE CIRC".
• B: Refer to CCS-61, "
Diagnosis Procedure".
• C: Refer to CCS-28, "
DTC 45 BRAKE SW/STOP L SW".
• D: Refer to CCS-30, "
DTC 46 OPERATION SW CIRC".
Revision: March 2010 2008 QX56

CCS-60
< SYMPTOM DIAGNOSIS >
ICC STEERING SWITCH (OTHER THAN MAIN SWITCH) DOES NOT FUNCTION
ICC STEERING SWITCH (OTHER THAN MAIN SWITCH) DOES NOT
FUNCTION
Diagnosis ProcedureINFOID:0000000001744724
RESUME will not function in the following cases:
• When ON/OFF switch is pressed once after the ICC system was ON.
• When the vehicle speed is less than 32 km/h (20 MPH).
1.CHECK SWITCH
1. With "DATA MONITOR", check that the following switches operate normally. “RESUME/ACC SW”, “CANCEL SW”, “DISTANCE ADJ”.
Do the monitor items display properly?
YES >> Replace ICC unit and erase DTC. Refer to CCS-70, "ICC Unit". Perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 2
2.CHECK DIAGNOSIS
Perform self-diagnosis with CONSULT-III.
Is "CAN COMM CIRCUIT" indicated?
YES >> Refer to CCS-24, "DTC 20 CAN COMM CIRCUIT".
NO >> Refer to CCS-30, "
DTC 46 OPERATION SW CIRC".
Revision: March 2010 2008 QX56