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Infiniti FX35, FX50 (S51). Manual - part 312

CCS-68

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A06 OPERATION SW

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace the ICC steering switch.

Special Repair Requirement

INFOID:0000000005501599

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

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.

CHECK ICC SYSTEM

Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-18, "ACTION TEST : Description"

for action test.)

Check that the ICC system is normal.

>> WORK END

Terminal

Switch operation

Resistance

[

Ω

]

When pressing MAIN switch

Approx. 0

When pressing LDP/DCA switch

Approx. 267

When pressing CANCEL switch

Approx. 615

When pressing DISTANCE switch

Approx.

1090

When pressing SET/COAST switch

Approx.

1805

When pressing RESUME/ACCELERATE
switch

Approx.

2985

When all switches are not pressed

Approx.

5415

CCS

C1A08 PRESSURE SENSOR

CCS-69

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A08 PRESSURE SENSOR

Description

INFOID:0000000005501600

• The brake pressure sensor detects the brake fluid pressure value in the brake master cylinder and outputs

the value to the brake booster control unit.

• The brake booster control unit receives the brake fluid pressure command signal from the ICC sensor inte-

grated unit via ITS communication and controls the brake fluid pressure while feeding back the brake fluid
pressure value (brake fluid pressure control signal).

DTC Logic

INFOID:0000000005501601

DTC DETECTION LOGIC

NOTE:
If DTC “C1A08” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to

CCS-137,

"DTC Logic"

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

Start the engine.

Turn the MAIN switch of ICC system ON.

Perform “All DTC Reading” with CONSULT-III.

Check if the “C1A08” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”.

Is “C1A08” detected as the current malfunction?

YES

>> Refer to

CCS-69, "Diagnosis Procedure"

>> Refer to

GI-36, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000005501602

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A08” 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-137, "DTC Logic"

>> GO TO 2.

CHECK HARNESS BETWEEN BRAKE BOOSTER CONTROL UNIT AND BRAKE PRESSURE SENSOR

Turn the ignition switch OFF.

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

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

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

DTC

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A08

(8)

PRESS SEN CIRCUIT

If the brake pressure sensor value that is input
to the brake booster control unit is malfunc-
tioning

• Brake pressure sensor circuit
• Brake pressure sensor
• Brake booster control unit

Brake booster control unit

Brake pressure sensor

Continuity

Connector

Terminal

Connector

Terminal

B250

E45

Existed

CCS-70

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A08 PRESSURE SENSOR

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair the harnesses or connectors.

CHECK BRAKE PRESSURE SENSOR POWER SUPPLY CIRCUIT

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

Turn the ignition switch ON.

Check voltage between brake booster control unit harness connectors.

Is the inspection result normal?

YES

>> Replace the brake pressure sensor.

>> Replace the brake booster control unit.

Special Repair Requirement

INFOID:0000000005501603

DESCRIPTION

SPECIAL REPAIR REQUIREMENT

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.

CHECK ICC SYSTEM

Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-18, "ACTION TEST : Description"

for action test.)

Check that the ICC system is normal.

>> WORK END

Brake booster control unit

Ground

Continuity

Connector

Terminal

B250

Not existed

Terminals

Voltage

(Approx.)

(+)

(–)

Brake booster control unit

Connector

Terminal

B250

5 V

CCS

C1A09 BOOSTER SOLENOID

CCS-71

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A09 BOOSTER SOLENOID

Description

INFOID:0000000005501604

• 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:0000000005501605

DTC DETECTION LOGIC

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

CCS-137,

"DTC Logic"

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

Start the engine.

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

Perform “All DTC Reading”.