Infiniti FX35, FX50 (S51). Manual - part 375

CCS-320

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the accelerator pedal actuator power supply circuit.

3.

CHECK ACCELERATOR PEDAL ACTUATOR GROUND CIRCUIT

Check for continuity between accelerator pedal actuator harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the accelerator pedal actuator ground circuit.

Terminals

Condition

Voltage

(+)

(–)

Accelerator pedal actuator

Ground

Ignition 

switch

Connector

Terminal

E115

2

OFF

Battery volt-

age

1

ON

Accelerator pedal actuator

Ground

Continuity

Connector

Terminal

E115

4

Existed

CCS

ICC WARNING CHIME CIRCUIT

CCS-321

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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ICC WARNING CHIME CIRCUIT

Description

INFOID:0000000005501988

• The ICC sensor integrated unit transmits the buzzer output signal to the brake booster control unit via ITS

communication. 

• The brake booster control unit outputs the buzzer output signal to the ICC warning chime. 
• A warning chime sounds when the system is canceled or when the vehicle distance from the vehicle ahead

is too close.

Component Function Check

INFOID:0000000005501989

1.

ICC WARNING CHIME OPERATION INSPECTION

1.

Select the active test item “ICC BUZZER” of “ICC” with CONSULT-III. 

2.

Check if the ICC warning chime sounds when operating each test item. 

Does the ICC warning chime sound?

YES

>> The ICC warning chime circuit is normal. 

NO

>> Refer to 

CCS-321, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005501990

1.

CHECK ICC WARNING CHIME POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the ICC warning chime connector. 

3.

Turn ignition switch ON.

4.

Check voltage between ICC warning chime harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK ICC WARNING CHIME SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect brake booster control unit connector. 

3.

Check for continuity between the ICC warning chime harness connector and brake booster control unit
harness connector. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK ICC WARNING CHIME SIGNAL CIRCUIT SHORT

Check for continuity between ICC warning chime harness connector and ground. 

Terminals

Voltage

(Approx.)

(+)

(–)

ICC warning chime

Ground

Connector

Terminal

M17

1

Battery voltage

ICC warning chime

Brake booster control unit

Continuity

Connector

Terminal

Connector

Terminal

M17

3

B250

21

Existed

CCS-322

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

ICC WARNING CHIME CIRCUIT

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK ICC WARNING CHIME

Check the ICC warning chime. Refer to 

CCS-322, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the brake booster control unit. 

NO

>> Replace the ICC warning chime. 

Component Inspection

INFOID:0000000005501991

1.

ICC WARNING CHIME INSPECTION

Apply the battery voltage between ICC warning chime terminals, and then check if the ICC warning chime
sounds. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the ICC warning chime. 

ICC warning chime

Ground

Continuity

Connector

Terminal

M17

3

Not existed

Terminal

Condition

Warning 

chime

(+)

(–)

1

3

When the battery voltage is applied

Sounds

When the battery voltage is not applied

Does not 

sound

CCS

ICC SENSOR INTEGRATED UNIT

CCS-323

< ECU DIAGNOSIS INFORMATION >

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ECU DIAGNOSIS INFORMATION

ICC SENSOR INTEGRATED UNIT

Reference Value

INFOID:0000000005501992

VALUES ON THE DIAGNOSIS TOOL

Monitor item

Condition

Value/Status

MAIN SW

Ignition switch ON

When MAIN switch is pressed

On

When MAIN switch is not pressed

Off

SET/COAST SW

Ignition switch ON

When SET/COAST switch is pressed

On

When SET/COAST switch is not pressed

Off

CANCEL SW

Ignition switch ON

When CANCEL switch is pressed

On

When CANCEL switch is not pressed

Off

RESUME/ACC SW

Ignition switch ON

When RESUME/ACCELERATE switch is pressed

On

When RESUME/ACCELERATE switch is not pressed

Off

DISTANCE SW

Ignition switch ON

When DISTANCE switch is pressed

On

When DISTANCE switch is not pressed

Off

CRUISE OPE

Drive the vehicle and operate 
the ICC system.

When ICC system is controlling

On

When ICC system is not controlling

Off

BRAKE SW

Ignition switch ON

When brake pedal is depressed

Off

When brake pedal is not depressed

On

STOP LAMP SW

Ignition switch ON

When brake pedal is depressed

On

When brake pedal is not depressed

Off

IDLE SW

Engine running

Idling

On

Except idling (depress accelerator pedal)

Off

SET DISTANCE

• Start the engine and turn the 

ICC system ON.

• Press the DISTANCE 

switch to change the vehi-
cle-to-vehicle distance set-
ting.

When set to “long”

Long

When set to “middle”

Mid

When set to “short”

Short

CRUISE LAMP

Start the engine and press 
MAIN switch.

ICC system ON
(MAIN switch indicator ON)

On

ICC system OFF
(MAIN switch indicator OFF)

Off

OWN VHCL

Start the engine and press 
MAIN switch.

ICC system ON
(Own vehicle indicator ON)

On

ICC system OFF
(Own vehicle indicator OFF)

Off

VHCL AHEAD

Drive the vehicle and activate 
the vehicle-to-vehicle distance 
control mode.

When a vehicle ahead is detected (vehicle ahead de-
tection indicator ON)

On

When a vehicle ahead is not detected (vehicle ahead 
detection indicator OFF)

Off

ICC WARNING

Start the engine and press the 
MAIN switch.

When ICC system is malfunctioning
 (ICC system warning lamp ON)

On

When ICC system is normal
 (ICC system warning lamp OFF)

Off

VHCL SPEED SE

While driving

Value of vehicle 

speed signal 

(wheel speed)