Infiniti FX35, FX50 (S51). Manual - part 358

CCS-252

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A16 RADAR STAIN

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

C1A18 LASER AIMING INCMP

CCS-253

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

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B

N

P

A

C1A18 LASER AIMING INCMP

Description

INFOID:0000000005501847

Always perform the laser beam aiming adjustment after replacing the ICC sensor integrated unit. 

DTC Logic

INFOID:0000000005501848

DTC DETECTION 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 “C1A18” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “C1A18” detected as the current malfunction?

YES

>> Refer to 

CCS-253, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005501849

1.

ADJUST LASER BEAM AIMING

1.

Adjust the laser beam aiming. Refer to 

CCS-13, "LASER BEAM AIMING ADJUSTMENT : Description"

. 

2.

Erase All self-diagnosis results with CONSULT-III.

3.

Perform “All DTC Reading”. 

4.

Check if the “C1A18” is detected in “Self Diagnostic Result” of “ICC”. 

Is “C1A18” detected?

YES

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

NO

>> INSPECTION END

Special Repair Requirement

INFOID:0000000005501850

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

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A18

(18)

LASER AIMING IN-
CMP

Laser beam aiming of ICC sensor integrated unit 
is not adjusted

• No laser beam aiming adjustment is 

performed

• Laser beam aiming adjustment has 

been interrupted

CCS-254

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A18 LASER AIMING INCMP

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

C1A21 UNIT HIGH TEMP

CCS-255

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A21 UNIT HIGH TEMP

Description

INFOID:0000000005501851

ICC sensor integrated unit integrates the temperature sensor. 

DTC Logic

INFOID:0000000005501852

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more and cool the ICC sensor integrated unit. 

3.

Start the engine.

4.

Turn the DCA system ON. 

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if the “C1A21” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “C1A21” detected as the current malfunction?

YES

>> Refer to 

CCS-255, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501853

1.

CHECK ENGINE COOLING SYSTEM

Check for any malfunctions in engine cooling system. 

Is engine cooling system normal?

YES

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

NO

>> Repair engine cooling system. 

Special Repair Requirement

INFOID:0000000005501854

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. 

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A21

(21)

UNIT HIGH TEMP

If the temperature sensor (integrated in the ICC 
sensor integrated unit) detects a high temperature

Temperature around ICC sensor inte-
grated unit is excessively high