Infiniti FX35, FX50 (S51). Manual - part 360

CCS-260

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A22 BCU CIRCUIT

YES

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

EC-541, "DTC Index"

 (VQ35HR) or 

EC-1179, "DTC Index"

 (VK50VE). 

NO

>> Replace the brake booster control unit. 

Special Repair Requirement

INFOID:0000000005501858

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

CCS

C1A24 NP RANGE

CCS-261

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A24 NP RANGE

Description

INFOID:0000000005501859

ICC sensor integrated unit judges the NP position status from the shift position signal and current gear position
signal received from TCM via CAN communication. 

DTC Logic

INFOID:0000000005501860

DTC DETECTION LOGIC

NOTE:
If DTC “C1A24” 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)

1.

Start the engine.

2.

Turn the DCA system ON. 

3.

Wait for approximately 5 minutes or more after shifting the selector lever to “P” position. 

4.

Perform “All DTC Reading” with CONSULT-III. 

5.

Check if the “C1A24” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “C1A24” detected as the current malfunction?

YES

>> Refer to 

CCS-261, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE (2)

1.

Wait for approximately 5 minutes or more after shifting the selector lever to “N” position. 

2.

Perform “All DTC Reading”. 

3.

Check if the “C1A24” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “C1A24” detected as the current malfunction?

YES

>> Refer to 

CCS-261, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501861

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A24” 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 NP POSITION SWITCH SIGNAL

Check that “NP RANGE SW” operates normally in “DATA MONITOR” of “ICC”. 
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

3.

CHECK TCM DATA MONITOR

Check that “SLCT LVR POSI” operates normally in “DATA MONITOR” of “TRANSMISSION”. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A24

(24)

NP RANGE

If the shift position signal and the current gear 
position signal, transmitted from TCM via CAN 
communication, are inconsistent

• TCM
• Transmission range switch

CCS-262

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A24 NP RANGE

Is the inspection result normal?

YES

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "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-380, "Exploded View"

. 

Special Repair Requirement

INFOID:0000000005501862

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

CCS

C1A28 BCU POWER SUPPLY CIRCUIT, C1A29 BCU POWER SUPPLY 

CIRCUIT2

CCS-263

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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:0000000005501863

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

DTC Logic

INFOID:0000000005501864

DTC DETECTION LOGIC

NOTE:
If DTC “C1A28” or “C1A29” 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.

Turn the DCA 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-diagnosis results. 

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

YES

>> Refer to 

CCS-263, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501865

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-313, "ICC SENSOR INTEGRATED UNIT : 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-318, "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:0000000005501866

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 
CIR2

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