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Infiniti QX56 (JA60). Manual - part 170

CCS-16

< FUNCTION DIAGNOSIS >

INTELLIGENT CRUISE CONTROL SYSTEM

Component Description

INFOID:0000000005145982

×: Applicable

Component

Vehicle-to-

vehicle

distance

control mode

Conventional

(Fixed speed)

cruise

control mode

Brake assist

(With preview

function)

Description

ICC unit

Controls vehicle speed through ECM via CAN commu-
nication.

ICC sensor

Measures distance to objects in front of the vehicle and
transmits that information to the ICC unit.

ECM

Refer to

EC-21, "System Diagram"

ABS actuator and electric
unit (control unit)

Refer to

BRC-17, "System Description"

Brake pressure sensor

Detects brake fluid pressure.

Brake booster

Adjusts brake fluid pressure based on command from
ABS actuator and electric unit (control unit).

BCM

Transmits front wiper request signal to ICC sensor inte-
grated unit through CAN communication.

TCM

Refer to

TM-20, "TCM Function"

CCS

DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)

CCS-17

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)

Diagnosis Description

INFOID:0000000005145983

The ICC system includes the on board self-diagnosis function 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 seconds

through 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-56, "Diagnostic Trouble Code (DTC) Chart"

NOTE:

• DTC will disappear after 5 minutes.

• When more than one malfunction is detected, a maximum 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-56, "Diagnostic Trouble Code (DTC) Chart"

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:0000000005145984

DESCRIPTION

CONSULT-III can display each diagnostic item using 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 cancellation

Vehicle-to-vehi-
cle distance
control mode

Conventional
(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.

CCS

DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)

CCS-19

< FUNCTION DIAGNOSIS >

• 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 number returns to 0 when detecting the same cancellation causes.

SELF DIAGNOSTIC RESULT

For details, refer to

CCS-56, "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

→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 returns 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

→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 returns 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).

SET DISTANCE
[SHOR/MID/LONG]

Indicates set distance memorized in ICC sensor integrated unit.

MAIN SW
[On/Off]