Infiniti FX35, FX50 (S51). Manual — part 352

CCS-228

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A08 PRESSURE SENSOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK BRAKE PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Connect connectors of brake booster control unit and brake pressure sensor.

2.

Turn the ignition switch ON.

3.

Check voltage between brake booster control unit harness connectors.

Is the inspection result normal?

YES

>> Replace the brake pressure sensor.

NO

>> Replace the brake booster control unit.

Special Repair Requirement

INFOID:0000000005501810

DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed.
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit

SPECIAL REPAIR REQUIREMENT

1.

LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

.

>> GO TO 2.

2.

CHECK DCA SYSTEM

1.

Erase the “self-diagnosis results”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-191, "ACTION TEST : Description"

for action test.)

2.

Check that the DCA system is normal.

>> WORK END

Brake booster control unit

Ground

Continuity

Connector

Terminal

B250

8

Not existed

17

24

Terminals

Voltage

(Approx.)

(+)

(–)

Brake booster control unit

Connector

Terminal

B250

8

24

5 V

CCS

C1A09 BOOSTER SOLENOID

CCS-229

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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C1A09 BOOSTER SOLENOID

Description

INFOID:0000000005501811

• The booster solenoid is integrated with the brake booster.
• The brake booster control unit activates the booster solenoid to operate the brake booster (brake) according

to the brake fluid pressure command signal received from ICC sensor integrated unit via ITS communica-
tion.

DTC Logic

INFOID:0000000005501812

DTC DETECTION LOGIC

NOTE:
If DTC “C1A09” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to

CCS-313, "ICC

SENSOR INTEGRATED UNIT : DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Perform the active test item “BOOSTER SOL/V” with CONSULT-III.

3.

Perform “All DTC Reading”.

4.

Check if the “C1A09” is detected as the current malfunction in self-diagnosis results of “ICC”.

Is “C1A09” detected as the current malfunction?

YES

>> Refer to

CCS-229, "Diagnosis Procedure"

.

NO

>> Refer to

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005501813

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A09” in “Self Diagnostic Result” of “ICC”.
Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to

CCS-313, "ICC SENSOR INTEGRATED UNIT : DTC Logic"

.

NO

>> GO TO 2.

2.

CHECK BRAKE BOOSTER CONTROL UNIT POWER SUPPLY CIRCUIT

Check power supply and ground circuit of brake booster control unit. Refer to

CCS-318, "BRAKE BOOSTER

CONTROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CHECK HARNESS BETWEEN BRAKE BOOSTER (BOOSTER SOLENOID) AND BRAKE BOOSTER

CONTROL UNIT

1.

Turn the ignition switch OFF.

2.

Disconnect connectors of brake booster control unit and brake booster.

3.

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

DTC

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A09

(9)

BOOSTER SOL/V CIRC

If the booster solenoid is malfunctioning

• Booster solenoid
• Booster solenoid circuit
• Brake booster control unit

CCS-230

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A09 BOOSTER SOLENOID

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK BOOSTER SOLENOID

Check the booster solenoid. Refer to

CCS-230, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the brake booster control unit.

NO

>> Replace the brake booster.

Component Inspection

INFOID:0000000005501814

1.

CHECK BRAKE BOOSTER (BOOSTER SOLENOID)

Check resistance between brake booster (booster solenoid) termi-
nals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the brake booster.

Special Repair Requirement

INFOID:0000000005501815

DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed.
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit

SPECIAL REPAIR REQUIREMENT

1.

LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

.

>> GO TO 2.

2.

CHECK DCA SYSTEM

1.

Erase the “self-diagnosis results”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-191, "ACTION TEST : Description"

for action test.)

Brake booster control unit

Brake booster

Continuity

Connector

Terminal

Connector

Terminal

B250

10

E44

4

Existed

12

6

Brake booster control unit

Ground

Continuity

Connector

Terminal

B250

10

Not existed

12

Brake booster

Resistance

Terminal

4

6

Approx. 1.4

Ω

JPOIA0160GB

CCS

C1A09 BOOSTER SOLENOID

CCS-231

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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2.

Check that the DCA system is normal.

>> WORK END