Infiniti FX35, FX50 (S51). Manual - part 330

CCS-140

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

ICC SENSOR INTEGRATED UNIT

ICC SENSOR INTEGRATED UNIT : Diagnosis Procedure

INFOID:0000000005501730

1.

CHECK FUSES

Check if any of the following fuses are blown:

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

2.

CHECK ICC SENSOR INTEGRATED UNIT POWER SUPPLY CIRCUIT 

1.

Turn the ignition switch ON.

2.

Check voltage between ICC sensor integrated unit harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the ICC sensor integrated unit power supply circuit. 

3.

CHECK ICC SENSOR INTEGRATED UNIT GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the ICC sensor integrated unit connector. 

3.

Check for continuity between ICC sensor integrated unit harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the ICC sensor integrated unit ground circuit. 

BRAKE BOOSTER CONTROL UNIT

BRAKE BOOSTER CONTROL UNIT : Diagnosis Procedure

INFOID:0000000005501731

1.

CHECK FUSES

Check if any of the following fuses are blown:

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

Signal name

Fuse No.

Ignition power supply

45

Terminal

Voltage

(Approx.)

(+)

(–)

ICC sensor integrated unit

Ground

Connector

Terminal

E67

1

Battery voltage

ICC sensor integrated unit

Ground

Continuity

Connector

Terminal

E67

4

Existed

Signal name

Fuse No.

Battery power supply

33

Ignition power supply

45

CCS

POWER SUPPLY AND GROUND CIRCUIT

CCS-141

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

2.

CHECK BRAKE BOOSTER CONTROL UNIT POWER SUPPLY CIRCUIT

1.

Turn the ignition switch ON.

2.

Check voltage between brake booster control unit harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the brake booster control unit power supply circuit. 

3.

CHECK BRAKE BOOSTER CONTROL UNIT GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect brake booster control unit connector. 

3.

Check for continuity between brake booster control unit harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the brake booster control unit ground circuit. 

Terminal

Condition

Voltage

(Approx.)

(+)

(–)

Brake booster control unit

Ground

Ignition 

switch

Connector

Terminal

B250

1

OFF

Battery volt-

age

2

B249

33

ON

42

Brake booster control unit

Ground

Continuity

Connector

Terminal

B250

19

Existed

20

B249

46

CCS-142

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

ICC WARNING CHIME CIRCUIT

ICC WARNING CHIME CIRCUIT

Description

INFOID:0000000005501732

• 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:0000000005501733

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-142, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005501734

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

ICC WARNING CHIME CIRCUIT

CCS-143

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

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-143, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the brake booster control unit. 

NO

>> Replace the ICC warning chime. 

Component Inspection

INFOID:0000000005501735

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