2008 INFINITI QX56 Stop

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:0000000001731814
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: March 2010 2008 QX56

CCS-20
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
BRAKE SW
[On/Off] ××
Indicates [On/Off] status as judged from ICC brake switch signal (ECM trans-
mits ICC brake switch signal through CAN communication).
STOP LAMP SW
[On/Off] ××Indicates [On/Off] status as judged from stop lamp switch signal (ECM trans-
mits stop lamp switch signal through CAN communication).
CRUISE LAMP
[On/Off] ××
Indicates [On/Off] status of MAIN switch indicator lamp output.
CLUTCH SW SIG
[On/Off] ××
NOTE:
This item is displayed, but cannot monitor.
NP SW SIG
[On/Off] ××Indicates [On/Off] status as judged from transmission range switch signal
(ECM transmits transmission range switch signal through CAN communica-
tion).
STP LMP DRIVE
[On/Off] ××
Indicates [On/Off] status of ICC brake hold relay drive output.
PWR SUP MONI
[V] ××
Indicates IGN voltage input by ICC sensor integrated unit.
IDLE SW
[On/Off] ×Indicates [On/Off] status of idle switch read from ICC sensor integrated unit
through CAN communication (ECM transmits On/Off status through CAN
communication).
OWN VHCL
[On/Off] ×
Indicates [On/Off] status of own vehicle indicator output.
VHCL AHEAD
[On/Off] ×
Indicates [On/Off] status of vehicle ahead detection indicator output.
ICC WARNING
[On/Off] ×
Indicates [On/Off] status of ICC system warning lamp output.
BUZZER O/P
[On/Off] ×
Indicates [On/Off] status of ICC warning chime output.
ENGINE RPM
[rpm] ×Indicates engine speed read from ICC sensor integrated unit through CAN
communication (ECM transmits engine speed through CAN communication).
WIPER SW
[OFF/LOW/HIGH] ×
Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front wiper request
signal through CAN communication).
YAW R AT E
[deg/s] ×NOTE:
This item is displayed, but cannot monitor.
D RANGE SW
[On/Off] ×Indicates [On/Off] status of “D” or “DS” or “M” positions read from ICC sensor
integrated unit through CAN communication; ON when position “D” or “DS” or
“M” (TCM transmits shift position indicator lamp signal through CAN commu-
nication).
NP RANGE SW
[On/Off] ×Indicates shift position indicator lamp signal read from ICC sensor integrated
unit through CAN communication (TCM transmits shift position indicator lamp
signal through CAN communication).
VHCL SPD AT
[km/h] or [mph] ×Indicates vehicle speed calculated from A/T vehicle speed sensor read from
ICC sensor integrated unit through CAN communication (TCM transmits A/T
vehicle speed sensor signal through CAN communication).
GEAR
[1, 2, 3, 4, 5] ×Indicates A/T gear position read from ICC sensor integrated unit through CAN
communication (TCM transmits current gear position signal through CAN
communication).
MODE SIG
[OFF, ICC, ASCD] ×Indicates the active mode from ICC or ASCD [conventional (fixed speed)
cruise control mode].
SET DISP IND
[On/Off] ×
Indicates [On/Off] status of SET switch indicator output.
DISTANCE
[m] ×
Indica
t

es the distance from the vehicle ahead.
RELATIVE SPD
[m/s] ×
Indicates the relative speed of the vehicle ahead.
Monitored Item [unit]
MAIN
SIGNALS SELECTION
FROM
MENU Description
Revision: March 2010
2008 QX56

CCS
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
CCS-21
< FUNCTION DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B
N P A
ACTIVE TEST
NOTE:
• Never perform the active test while driving.
• “Active Test” cannot be started while ICC system warning lamp illuminates.
ECU IDENTIFICATION
Displays the part number of t he ICC sensor integrated unit.
Active test item Function
ICC BUZZER Activates/deactivates the ICC buzzer.
METER LAMP Turns ON/OFF the MAIN switch indicator and ICC system warning lamp.
NOTE:
Start the engine and perform active test.
STOP LAMP Drives the ICC brake hold relay and turns ON/OFF the stop lamp.
Revision: March 2010 2008 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:0000000001744708
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: March 2010 2008 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 B17 (A) terminal 38 and ICC brake hold relay harness connector E134
(B) terminal 6.
3. Check continuity between ICC unit harness connector B17 (A) terminal 38 and stop lamp switch harness connector E38 (C) 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: March 2010
2008 QX56

CCS-32
< COMPONENT DIAGNOSIS >
DTC 90 STOP LAMP RLY FIX
DTC 90 STOP LAMP RLY FIX
DTC 90 STOP LAMP RLY FIXINFOID:0000000001744711
1.CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect and check ICC unit connector.
Does connector check OK?
YES >> GO TO 2
NO >> • Connector malfunction. • Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
2.CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
1. Connect ICC unit connector and turn ignition switch ON.
2. With data monitor, check that “STOP LAMP SW” and “BRAKE SW” operate normally.
Do the monitor items display normally?
YES >> GO TO 11
NO >> • BRAKE SW: GO TO 3 • STOP LAMP SW: GO TO 8
3.CHECK AND ADJUST ICC BRAKE SWITCH
Check ICC brake switch for proper installation and adjust if necessary.
Does the ICC brake switch pass inspection?
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. Refer to CCS-28, "
DTC 45 BRAKE SW/STOP L SW" .
Is the ICC brake switch operating normally?
YES >> GO TO 5
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 ICC BRAKE HOLD RELAY
Disconnect ICC brake hold relay and check continuity between ICC
brake hold relay terminal 4 and terminal 3.
Does continuity exist?
YES >> GO TO 6
NO >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
6.CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT
1. Disconnect ECM and ICC unit harness connectors. Continuity should exist.
SKIA6658E
Revision: March 2010
2008 QX56

CCS
DTC 90 STOP LAMP RLY FIXCCS-33
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B
N P A
2. Check continuity between ICC brake hold relay harness connec- tor E134 (B) terminal 3 and IC C unit harness connector B17 (A)
terminal 29.
3. Check continuity between ICC unit harness connector B17 (A) terminal 29 and ground.
Are continuity test results as specified?
YES >> GO TO 7
NO >> • Repair harness between ICC brake hold relay and ICC brake switch. • Repair harness between ICC brake switch and ICC unit.
• Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
7.CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between ICC brake hold relay harness connector E134 terminal 4 and ground.
Does battery voltage 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 >> • Check fuse or ICC brake hold relay power supply sys- tem harness.
• Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION TEST : ICC Sys-
tem Running Test".
8.CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Check stop lamp switch.
Does stop lamp switch operate normally?
YES >> GO TO 9
NO >> Replace stop lamp switch. Erase DTC and perform ICC system running test. Refer to CCS-8,
"ACTION TEST : ICC System Running Test".
9.CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect stop lamp switch connector.
2. When brake pedal is not depressed, make sure that stop lamp does not illuminate.
Does the ICC brake hold relay 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 >> GO TO 10
10.CHECK ICC BRAKE HOLD RELAY Continuity should exist.
Continuity should not exist.
ALOIA0008ZZ
Battery voltage should exist
ALOIA0009ZZ
Revision: March 2010
2008 QX56

CCS-34
< COMPONENT DIAGNOSIS >
DTC 90 STOP LAMP RLY FIX
1. Disconnect ICC brake hold relay.
2. Check continuity between ICC brake hold relay E134 terminal 7and terminal 6.
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 >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
11 . CHECK HARNESS THROUGH ICC UNIT, ICC BRAKE HOLD RELAY, AND GROUND
1. Disconnect ICC unit and ICC brake hold relay harness connec- tors.
2. Check continuity between I CC unit harness connector B17 ter-
minal 47 and ICC brake hold relay harness connector E134 ter-
minal 1.
3. Check continuity between I CC unit harness connector B17 ter-
minal 47 and ground.
4. Check continuity between ICC brake hold relay harness connec- tor E134 terminal 2 and ground.
Are continuity test results as specified?
YES >> GO TO 12
NO >> • Repair harness through ICC unit and ICC brake hold relay, or between ICC brake hold relay and ground.
• Erase DTC and perform ICC system running test.
Refer to CCS-8, "
ACTION TEST : ICC System Run-
ning Test".
12.CHECK ICC BRAKE HOLD RELAY
Check continuity between ICC brake hold relay terminal 1 and termi-
nal 2.
Does continuity exist?
YES >> GO TO 13
NO >> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Refer to CCS-8, "
ACTION
TEST : ICC System Running Test".
13.CHECK ICC UNIT STANDARD VOLTAGE Continuity should not exist.
SKIA6659E
47 - 1
Continuity should exist.
47 - Ground Continuity should not exist.
SKIA6660E
Continuity should exist.
SKIA6661E
Continuity should exist
(minimal resistance through coil will exist)
SKIA6662E
Revision: March 2010 2008 QX56