Infiniti FX35 / FX45. Instruction - page 12

ACS-42

< SERVICE INFORMATION >

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> 1.

Repair harness between brake pressure sensor and
ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

3.

CHECK POWER SUPPLY CIRCUIT FOR BRAKE PRESSURE SENSOR

1.

Connect ICC unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between ICC unit harness connector terminals.

OK or NG

OK

>> 1.

Replace brake pressure sensor. Refer to

BR-12,

"Removal and Installation"

.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

NG

>> 1.

Replace ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

DTC 62 BOOSTER SOL/V CIRCUIT

INFOID:0000000001328834

1.

CHECK SOLENOID/RELEASE SWITCH AND ICC UNIT CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect brake booster connector and ICC unit connector, and connect them securely again.

3.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated?

YES

>> GO TO 2.

NO

>>

Poor connector connection

1.

Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.)

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

2.

CHECK HARNESS BETWEEN SOLENOID/RELEASE SWITCH AND ICC UNIT

ICC unit connector

Terminal

Ground

Continuity

M88

8

No

17

24

PKIB1444E

ICC unit connector

Terminal

Voltage (Approx.)

(+)

(

)

M88

8 24

5

V

SKIA6653E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-43

< SERVICE INFORMATION >

[ICC]

C

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1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and brake booster connector.

3.

Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> 1.

Repair harness between brake booster and ICC
unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

3.

CHECK BOOSTER SOLENOID

Check booster solenoid. Refer to

ACS-63, "Booster Solenoid"

.

OK or NG

OK

>> 1.

Replace ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

NG

>>

Booster solenoid malfunction

1.

Replace brake booster.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

DTC 63 RELEASE SW CIRCUIT

INFOID:0000000001328835

1.

CHECK SOLENOID/RELEASE SWITCH AND ICC UNIT CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect brake booster connector and ICC unit connector, and connect them securely again.

3.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated?

YES

>> GO TO 2.

NO

>>

Poor connector connection

1.

Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.)

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

2.

CHECK HARNESS SOLENOID/RELEASE SWITCH AND ICC UNIT

A

B

Continuity

Connector

Terminal

Connector

Terminal

M88

10

E54

4

Yes

12

6

PKIC5179E

ICC unit

connector

Terminal

Ground

Continuity

M88

10

No

12

PKIB4148E

ACS-44

< SERVICE INFORMATION >

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and brake booster connector.

3.

Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> 1.

Repair harness between brake booster and ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

3.

CHECK RELEASE SWITCH POWER SUPPLY CIRCUIT

1.

Connect ICC unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between ICC unit harness connector and ground.

OK or NG

OK

>> GO TO 4.

NG

>> 1.

Replace ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

4.

CHECK RELEASE SWITCH

1.

Turn ignition switch OFF.

2.

Check release switch. Refer to

ACS-63, "Release Switch"

.

OK or NG

OK

>> 1.

Replace ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

NG

>>

Release switch malfunction

1.

Replace brake booster.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

A

B

Continuity

ICC unit

connector

Terminal

Brake booster

connector

Terminal

M88

6

E54

1

Yes

15

3

22

2

PKIC5180E

ICC unit

connector

Terminal

Ground

Continuity

M88

6

No

15

22

PKIB1446E

ICC unit

connector

Terminal

Voltage (Approx.)

(+)

(

)

M88

6

Ground

10 V

SKIA6656E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-45

< SERVICE INFORMATION >

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

N

O

P

DTC 65 PRESSURE CONTROL

INFOID:0000000001328836

1.

OPERATION CHECK

Check foot brake pedal operates normally.

OK or NG

OK

>> GO TO 2.

NG

>> 1.

Check brake circuit.

2.

After repairing, erase DTC and perform active test (BOOSTER SOL/V3) with CONSULT-III.
Then perform self-diagnosis of ICC system again.

2.

CHECK BOOSTER SOLENOID

Check booster solenoid. Refer to

ACS-63, "Booster Solenoid"

.

OK or NG

OK

>> GO TO 3.

NG

>>

Booster solenoid malfunction

1.

Replace brake booster.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

3.

CHECK HARNESS BETWEEN ICC UNIT AND BRAKE BOOSTER

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and brake booster connector.

3.

Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> 1.

Replace ICC unit.

2.

Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.

NG

>> 1.

Repair harness between brake booster and ICC unit.

2.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

DTC 74 LASER BEAM OFF CNTR

INFOID:0000000001328837

1.

DIAGNOSTIC CHECK

1.

Adjust laser beam aiming. Then erase DTC, and perform ICC system running test.

2.

Perform self-diagnosis of ICC system.

3.

Check if “DTC 74 LASER BEAM OFF CNTR” is indicated.

Is it indicated?

YES

>> 1.

Replace ICC sensor, and adjust laser beam aiming.

A

B

Continuity

ICC unit

connector

Terminal

Brake booster con-

nector

Terminal

M88

10

E54

4

Yes

12

6

PKIC5179E

ICC unit

connector

Terminal

Ground

Continuity

M88

10

No

12

PKIB4148E

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