Infiniti G37 Coupe. Manual - part 303

CCS

DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)

CCS-25

< FUNCTION DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

DATA MONITOR

×

: Applicable

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”).

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]

×

×

Indicates [On/Off] status as judged from ICC clutch switch signal (ECM trans-
mits ICC clutch switch signal through CAN communication).

NP SW SIG
[On/Off]

×

×

Indicates [On/Off] status as judged from park/neutral position switch signal 
(ECM transmits park/neutral position 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.

CCS-26

< FUNCTION DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)

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 the ICC sensor integrated unit. 

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 RATE
[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]

×

Indicates 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

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. 

CCS

C1A00 CONTROL UNIT

CCS-27

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

C

D

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COMPONENT DIAGNOSIS

C1A00 CONTROL UNIT

Description

INFOID:0000000001606871

ICC sensor integrated unit function description.
• Irradiates laser beam, and receives reflected laser beam to measure distance from preceding vehicle.
• Controls vehicle distance by operating electric throttle control actuator based on that sensor signals and

CAN communication. 

• Controls vehicle distance by transmitting deceleration degree commandment value signal to ABS actuator

and electric unit (control unit) when deceleration with brake is needed.

DTC Logic

INFOID:0000000001606872

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001606873

1.

PERFORM SELF-DIAGNOSIS OF ICC SENSOR INTEGRATED UNIT

1.

Perform self-diagnosis of ICC sensor integrated unit.

2.

Check if DTC other than “CONTROL UNIT [C1A00]” (DTC 0) is detected.

Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

DIAGNOSIS FOR DETECTED DTC

Perform diagnosis on the detected DTC and repair or replace the applicable item. Refer to 

CCS-92, "DTC

Index"

.

>> GO TO 4.

3.

REPLACE ICC SENSOR INTEGRATED UNIT

1.

Replace ICC sensor integrated unit.

2.

Adjust laser beam aiming. Refer to 

CCS-7, "LASER BEAM AIMING ADJUSTMENT : Special Repair

Requirement (Preparation)"

.

>> GO TO 4.

4.

CHECK ICC SYSTEM

1.

Erase DTC and perform ICC system action test. Then perform self-diagnosis of ICC sensor integrated
unit. (For the details on the ICC system action test, refer to 

CCS-11, "ACTION TEST : Special Repair

Requirement (Vehicle-To-Vehicle Distance Control Mode)"

).

2.

Check that no abnormal condition is present in the ICC system. 

>> INSPECTION END

DTC No.

(On board 

display)

Trouble diagnosis 

name

DTC detecting condition

Possible cause

C1A00

(0)

CONTROL UNIT

ICC sensor integrated unit internal malfunction.

ICC sensor integrated unit

CCS-28

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

Description

INFOID:0000000001606874

The ICC sensor integrated unit controls the ICC system through the ignition power supply.

DTC Logic

INFOID:0000000001606875

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001606876

1.

CHECK CONNECTOR OF ICC SENSOR INTEGRATED UNIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC sensor integrated unit connector, and connect it securely again.

3.

Start engine and erase DTC.

4.

Press MAIN switch (ICC system ON).

5.

Perform self-diagnosis of ICC sensor integrated unit.

6.

Check if DTC “POWER SUPPLY CIR 1 [C1A01]” (DTC 1) or “ POWER SUPPLY CIR 2 [C1A02]” (DTC 2)
is detected.

Is any DTC detected?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK ICC SENSOR INTEGRATED UNIT CONNECTOR

1.

Check ICC sensor integrated unit connector housing for disconnected, loose, bent, and collapsed termi-
nals.

2.

Repair or replace the applicable item if any DTC is found.

>> GO TO 6.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT OF ICC SENSOR INTEGRATED UNIT

Check power supply and ground circuit of ICC sensor integrated unit. Refer to 

CCS-81, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

REPAIR OR REPLACE ICC SENSOR INTEGRATED UNIT POWER SUPPLY AND GROUND CIRCUIT

Repair and replace the malfunctioning ICC sensor integrated unit power supply and ground circuit. 

>> GO TO 6.

5.

REPLACE ICC SENSOR INTEGRATED UNIT

1.

Replace ICC sensor integrated unit.

2.

Adjust laser beam aiming. Refer to 

CCS-7, "LASER BEAM AIMING ADJUSTMENT : Special Repair

Requirement (Preparation)"

.

>> GO TO 6.

DTC No.

(On board 

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A01

(1)

POWER SUPPLY CIR 1

ICC sensor integrated unit power supply voltage 
is excessively low (Less than 8 V).

• ICC sensor integrated unit
• Connector, harness, fuse

C1A02

(2)

POWER SUPPLY CIR 2

ICC sensor integrated unit power supply voltage 
is excessively high (More than 19 V).