2009 INFINITI QX56 ignition

CCS
INSPECTION AND ADJUSTMENTCCS-11
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
N P A
1. Start the engine. Then, check that the following operations are performed correctly.
2. CRUISE lamp illuminates and ICC system indicator goes off when ON/OFF switch is pressed ON for more than 1.5 seconds.
The CRUISE lamp goes off when ON/OFF switch is turned to
OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the ignition switch back to ON and confirm that CRUISE lamp is
OFF.
CHECK FOR ACCEL/RES, COAST/SET, CANCEL SWITCHES
1. Check if ACCEL/RES, COAST/SET, CANCEL sw itches operate smoothly.
2. Check if switch buttons r ebound as the buttons are released.
ALOIA0012ZZ
Revision: December 20092009 QX56

CCS
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
CCS-17
< FUNCTION DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B
N P A
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
Diagnosis DescriptionINFOID:0000000003776935
The ICC system includes the on board self-diagnosis functi on that allows the technician to check for any trou-
ble codes on the ICC system display by operating the ICC steering switch.
ON BOARD SELF-DIAGNOSIS OPERETION PROCEDURE
1. Turn ignition switch OFF.
2. Start engine.
3. From 5 seconds through 15 seconds after start engine, press
RESUME/ACCELERATE switch 5 times, and SET/COAST
switch 5 times.
NOTE:
• Never turn the MAIN switch ON.
• When operation above is not completed from 5 secondsthrough 15 seconds, start again from above go to 1.
4. When the on board self-diagnosis starts up, the ICC system display shows DTC No. (1) at the set vehicle speed indicator. Refer to CCS-55, "
Diagnostic Trouble Code (DTC) Chart".
NOTE:
• DTC will disappear after 5 minutes.
• When more than one malfunction is detected, a maxi mum of 3 code numbers can be stored; the latest
malfunction will be displayed first.
WHEN ON BOARD SELF-DIAGNOSIS WILL NOT START UP
If the on board self-diagnosis does not start up, check the following items.
PKIB8371E
JSOIA0008GB
Assumed abnormal point Inspection item
ICC steering switch malfunction. Perform the inspection for DTC 46 OPERATION SW CIRC. Refer to CCS-30, "
DTC
46 OPERATION SW CIRC" .
Harness malfunction between ICC
steering switch and ECM.
ECM malfunction.
ICC unit malfunction. • Inspect the ICC sensor power and ground circuits. Refer to
CCS-25, "
DTC 31
POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2"
• Perform the self-diagnosis for the ICC unit with CONSULT-III, and check the diag-
nosis results. Refer to CCS-55, "
Diagnostic Trouble Code (DTC) Chart".
Revision: December 20092009 QX56

CCS-18
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
ERASING ON BOARD SELF-DIAGNOSIS
1. Stop the vehicle and turn ignition switch OFF.
2. Start engine and start on board self-diagnosis.
3. During on board self-diagnosis, press CANCEL switch 5 times,
and DISTANCE switch 5 times in this order.
NOTE:
• Press them within 10 seconds after pressing CANCEL switch
at first.
• When operation is not completed within 10 seconds, start again from step 2 above.
4. DTC 55 will be shown. NOTE:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
CONSULT-III Function (ICC)INFOID:0000000003776936
DESCRIPTION
CONSULT-III can display each diagnostic item us ing the diagnostic test modes shown following.
WORK SUPPORT
Cause of Auto-Cancel Display Item List
×: Applicable
PKIB8373E
Test mode Function
Work Support • Monitors aiming direction to facilitate laser beam aiming operation.
• Indicates causes of automatic cancellation of the ICC system.
Self Diagnostic Result Displays malfunctioning system memorized in ICC sensor integrated unit.
Data Monitor Displays real-time input/output data of ICC sensor integrated unit.
Active Test Enables operation check of electrical loads by sending driving signal to them.
ECU Identification Displays part number of ICC sensor integrated unit.
Work support item Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
For the adjustment procedure, refer to
CCS-5, "
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement".
Cause of cancellationVehicle-to-vehi-
cle distance
control modeConventional
(fixed speed)
cruise control
mode
Description
OPERATING WIPER ×Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ×ABS function was operated.
OPERATING TCS ××TCS function was operated.
OPERATING VDC ××VDC function was operated.
OPE SW VOLT CIRC ××Outside the standard control switch input voltage was detected.
ECM CIRCUIT ××ECM did not permit ICC operation.
LASER SUN BEAM ×Intense light such as sunlight entered ICC sensor integrated unit
light sensing part.
LASER TEMP ×Temperature around ICC sensor integrated unit became low.
OP SW DOUBLE TOUCH ××ICC steering switches were pressed at the same time.
WHL SPD ELEC NOISE ××Wheel speed sensor signal caught electromagnetic noise.
Revision: December 20092009 QX56

CCS
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
CCS-19
< FUNCTION DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B
N P A
• Last five cancel (system cancel) causes are displayed.
• “CAUSE OF AUTO-CANCEL” displays times of ignition switch ON/OFF up to 254 maximum. 254 is kept though the number exceeds 254. The num ber returns to 0 when detecting the same cancellation causes.
SELF DIAGNOSTIC RESULT
For details, refer to CCS-55, "Diagnostic Trouble Code (DTC) Chart".
NOTE:
“DTC RESULTS” and “TIME” are indicated on “Self Diagnostic Result”. “TIME” is used as a reference data of
diagnosis. It shows when malfunction is detected.
“TIME” shows the following.
• 0: malfunction is detected at present (from malfunction detection to ignition switch OFF).
CAN communication ([U1000], [U1010])
• 1 ~ 39: Displays when it is normal at present and finds malfunction in the past. It increases like
0→ 1→ 2...38→ 39 after returning to the normal condition whenever IGN OFF→ ON. If it is over 39, it is fixed to
39 until the self-diagnostic results are erased. It retu rns to 0 when malfunction is detected again in the pro-
cess.
Other than CAN communication (other than [U1000], [U1010])
• 1 ~ 49: Displays when it is normal at present and finds malfunction in the past. It increases like 0→ 1→ 2...48→ 49 after returning to the normal condition whenever IGN OFF→ ON. If it is over 49, it is fixed to
49 until the self-diagnostic results are erased. It retu rns to 0 when malfunction is detected again in the pro-
cess.
DATA MONITOR
× : Applicable
VDC/TCS OFF SW ×VDC OFF switch was pressed.
WHEEL SPD UNMATCH ××Wheel speed became different from A/T vehicle speed.
TIRE SLIP ××Wheel slipped.
IGN LOW VOLT ××Power supply voltage became low.
NO RECORD ××—
Monitored Item [unit]MAIN
SIGNALS SELECTION
FROM
MENU Description
VHCL SPEED SE
[km/h] or [mph] ××Indicates vehicle speed calculated from ICC sensor integrated unit through
CAN communication [ABS actuator and electric unit (control unit) transmits
vehicle speed signal (wheel speed) through CAN communication].
SET VHCL SPD
[km/h] or [mph] ××
Indicates set vehicle speed memorized in ICC sensor integrated unit.
THRTL OPENING
[%] ××Indicates throttle position read from ICC sensor integrated unit through CAN
communication (ECM transmits accelerator pedal position signal through
CAN communication).
THRTL SENSOR
[deg] ××NOTE:
This item is displayed, but cannot monitor.
SET DISTANCE
[SHOR/MID/LONG] ××
Indicates set distance memorized in ICC sensor integrated unit.
MAIN SW
[On/Off] ××
Indicates [On/Off] status as judged from ICC steering switch signal (ECM
transmits ICC steering switch signal through CAN communication).
SET/COAST SW
[On/Off] ××Indicates [On/Off] status as judged from ICC steering switch signal (ECM
transmits ICC steering switch signal through CAN communication).
CANCEL SW
[On/Off] ××Indicates [On/Off] status as judged from ICC steering switch signal (ECM
transmits ICC steering switch signal through CAN communication).
RESUME/ACC SW
[On/Off] ××
Indicates [On/Off] status as judged from ICC steering switch signal (ECM
transmits ICC steering switch signal through CAN communication).
DISTANCE SW
[On/Off] ×Indicates [On/Off] status as judged from ICC steering switch signal (ECM
transmits ICC steering switch signal through CAN communication).
CRUISE OPE
[On/Off] ××
Indicates whether controlling or not (ON means “controlling”).
Revision: December 20092009 QX56

CCS
DTC 12 VDC CONTROL UNITCCS-23
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B
N P A
DTC 12 VDC CONTROL UNIT
DTC 12 VDC CONTROL UNITINFOID:0000000003776938
1.DIAGNOSIS CHECK
Perform self-diagnosis of ABS actuator and electric unit (control unit).
Is malfunction indicated?
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to CCS-
8, "ACTION TEST : ICC System Running Test".
NO >> GO TO 2
2.CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit, and ABS act uator and electric unit (control unit) connectors, and connect them
securely again. Erase DTC, then perform self-diagnosis of ICC system again.
Does the DTC return?
YES >> Poor connector connection. Check connector hous ing for disconnected, loose, bent and collapsed
terminals. If any malfunction is detected, repa ir as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 3
3.CHECK HARNESS BETWEEN ICC UNIT AND ABS AC TUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit and ABS actuat or and electric unit (control
unit) connectors.
3. Check continuity between ICC unit harness connector B13 ter-
minal 10, and ABS actuator and electric unit (control unit) con-
nector E125 terminal 7.
Does continuity exist?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit". Erase
DTC and perform ICC system running test. Refer to
CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> • Repair harness between ICC unit, and ABS actuator and electric unit (control unit).
• Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
Continuity should exist.
WKIA3616E
Revision: December 20092009 QX56

CCS
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2
CCS-25
< COMPONENT DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B
N P A
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2INFOID:0000000003776940
1.CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors and connect them secu rely again. Erase DTC, then perform self-diagno-
sis of ICC system again.
Does the DTC reset?
YES >> GO TO 2
NO >> • Poor connector connection. • Check connector. Check connector housing for disconnected, loose, bent, and collapsed termi-nals. If any malfunction is detected, repair as as necessary. Erase DTC and perform ICC system
running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2.CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT
1. Turn ignition switch ON.
2. Check voltage between ICC unit harness connector B17 termi- nals 33, 42 and ground.
Does battery voltage exist?
YES >> GO TO 3
NO >> • Repair ICC unit power supply harness. • Erase DTC and perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Run-
ning Test".
3.CHECK GROUND CIRCUIT FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors.
3. Check continuity between ICC unit harness connector B13 ter- minals 19, 20, and connector B17 terminal 46 and ground.
Does continuity exist?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
CCS-8, "
ACTION TEST : ICC System Running Test" .
NO >> • Repair ICC unit ground harness.
• Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test" .
Battery voltage should exist.
SKIA1173E
Continuity should exist.
SKIA6650E
Revision: December 20092009 QX56

CCS-28
< COMPONENT DIAGNOSIS >
DTC 45 BRAKE SW/STOP L SW
DTC 45 BRAKE SW/STOP L SW
DTC 45 BRAKE SW/STOP L SWINFOID:0000000003776943
1.CHECK CONNECTORS FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors and connect them secu rely again. Erase DTC, then perform self-diagno-
sis of ICC system again.
Does the DTC reset?
YES >> • Poor connector connection. • Check connectors. Check connectors housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC system
running test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> GO TO 2
2.CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With data monitor, check if “STOP LAMP SW” and “BRAKE SW” are operating normally.
Do the monitor items display properly?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit". Erase DTC and perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test" .
NO >> • BRAKE SW: GO TO 3 • STOP LAMP SW: GO TO 5
3.ICC BRAKE SWITCH INSTALLATION AND ADJUSTMENT INSPECTION
Check ICC brake switch for proper installation and adjust if necessary.
Does ICC brake switch operate normally?
YES >> GO TO 4
NO >> After adjustment, erase DTC and perform ICC system running test. Refer to \
CCS-8, "
ACTION
TEST : ICC System Running Test" .
4.CHECK ICC BRAKE SWITCH
Check ICC brake switch.
Does the ICC brake switch check OK?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit". Erase DTC and perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
NO >> Replace ICC brake switch. Erase DTC and perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test".
5.CHECK STOP LAMP ILLUMINATION
Check stop lamp illumination.
Do the stop lamps operate normally?
YES >> GO TO 6
NO >> • Check stop lamp circuit. • Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
6.CHECK ICC BRAKE HOLD RELAY
Revision: December 20092009 QX56

CCS
DTC 45 BRAKE SW/STOP L SWCCS-29
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B
N P A
1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check continuity between ICC brake hold relay terminals.
Are continuity results as specified?
YES >> GO TO 7
NO >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
7.CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect ICC unit and stop lamp switch connectors.
2. Check continuity between ICC unit harness connector (A) B17 terminal 38 and ICC brake hold relay harness connector (B)
E134 terminal 6.
3. Check continuity between ICC unit harness connector (A) B17 terminal 38 and stop lamp switch harness connector (C) E38 ter-
minal 4.
Are continuity test results as specified?
YES >> Replace ICC unit. Refer to CCS-70, "ICC Unit". Erase DTC and perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Running Test" .
NO >> • Repair harness between ICC unit and ICC brake hold relay or stop lamp switch. • Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
7 - 6 Continuity should not exist.
4 - 3 Continuity should exist.
SKIA6651E
Continuity should exist.
Continuity should exist.
ALOIA0007ZZ
Revision: December 20092009 QX56