Infiniti FX35, FX50 (S51). Manual - part 321

CCS-104

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A24 NP RANGE

Is the inspection result normal?

YES

>> Replace the ICC sensor integrated unit. Refer to 

CCS-184, "Exploded View"

. 

NO

>> GO TO 4.

4.

PERFORM TCM SELF-DIAGNOSIS

1.

Perform “All DTC Reading”. 

2.

Check if any DTC is detected in “Self Diagnostic Result” of “TRANSMISSION”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

TM-150, "DTC Index"

 (VQ35HR) or 

TM-332, "DTC Index"

 (VK50VE). 

NO

>> Replace the ICC sensor integrated unit. Refer to 

CCS-184, "Exploded View"

. 

Special Repair Requirement

INFOID:0000000005501655

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 ICC SYSTEM

1.

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.)

2.

Check that the ICC system is normal. 

>> WORK END

CCS

C1A28 BCU POWER SUPPLY CIRCUIT, C1A29 BCU POWER SUPPLY 

CIRCUIT2

CCS-105

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A28 BCU POWER SUPPLY CIRCUIT, C1A29 BCU POWER SUPPLY
CIRCUIT2

Description

INFOID:0000000005501656

The brake booster control unit controls the brake booster, etc. with the battery power supply and ignition
power supply. 

DTC Logic

INFOID:0000000005501657

DTC DETECTION LOGIC

NOTE:
If DTC “C1A28” or “C1A29” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to

CCS-137, "DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A28” or “C1A29” is detected as the current malfunction in “Self Diagnostic Result”. 

Is “C1A28” or “C1A29” detected as the current malfunction?

YES

>> Refer to 

CCS-105, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501658

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A28”, “C1A29” 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"

. 

NO

>> GO TO 2.

2.

CHECK BRAKE BOOSTER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

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

CCS-140, "BRAKE BOOSTER

CONTROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the brake booster control unit. 

NO

>> Repair brake booster control unit power supply and ground circuit. 

Special Repair Requirement

INFOID:0000000005501659

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

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A28

(28)

BCU PWR SUPLY CIR

The brake booster control unit power supply 
voltage is excessively low (less than 8 V).

• Brake booster control unit
• Harness, connector, fuse

C1A29

(29)

BCU PWR SUPLY CIR 
2

The brake booster control unit power supply 
voltage is excessively high (more than 19 V).

CCS-106

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A28 BCU POWER SUPPLY CIRCUIT, C1A29 BCU POWER SUPPLY 

CIRCUIT2

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 ICC SYSTEM

1.

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.)

2.

Check that the ICC system is normal. 

>> WORK END

CCS

C1A30 BCU CAN COMM CIRC

CCS-107

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A30 BCU CAN COMM CIRC 

Description

INFOID:0000000005501660

The brake booster control unit communicates with ICC sensor integrated unit for brake booster control via ITS
communication. 

DTC Logic

INFOID:0000000005501661

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005501662

1.

PERFORM THE SELF-DIAGNOSIS

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A30” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”. 

Is “C1A30” detected as the current malfunction?

YES

>> Perform trouble diagnosis for the ITS communication system. Refer to 

LAN-20, "Trouble Diagno-

sis Flow Chart"

. 

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Special Repair Requirement

INFOID:0000000005501663

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 ICC SYSTEM

1.

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.)

2.

Check that the ICC system is normal. 

>> WORK END

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A30

(30)

BCU CAN COMM CIRC

If ICC sensor integrated unit receives the sig-
nal for improper condition for brake booster 
control unit via ITS communication

ITS communication system