Nissan X-Trail 32. Manual - part 204

BRC-282

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A16 RADAR BLOCKED

4.

PERFORM RADAR ALIGNMENT

1.

Adjust the radar alignment with CONSULT. Refer to 

BRC-262, "Description"

.

2.

Perform FEB system action test to check the operation status. Refer to 

BRC-268, "Description"

.

3.

Perform “All DTC Reading”.

4.

Check the “C1A16” is detected in “Self Diagnostic Result” of “LASER/RADAR”.

Is “C1A16” detected?

YES

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

.

NO

>> GO TO 5.

5.

INTERVIEW

1.

Ask if there is any trace of contamination or foreign materials adhering to the distance sensor area of the
front bumper. 

2.

Ask if distance sensor area of the front bumper was frosted during driving or if vehicle was driven in snow. 

3.

Ask if distance sensor area of the front bumper was temporarily fogged. (Windshield glass may also tend
to fog, etc.)

Is any of above conditions seen?

YES

>> Explain to the customer about the difference between the contamination detection function and

the indication when the malfunction is detected and tell them “This is not malfunction”.

NO

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

.

C1A17 DISTANCE SENSOR

BRC-283

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C

D

E

G

H

I

J

K

L

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A

B

BRC

N

O

P

C1A17 DISTANCE SENSOR

DTC Logic

INFOID:0000000010727824

DTC DETECTION LOGIC

NOTE:
If DTC C1A17 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

BRC-

296, "DTC Logic"

.

POSSIBLE CAUSE

Distance sensor

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more.

3.

Start the engine.

4.

Turn the FEB system ON. 

5.

Perform “All DTC Reading” with CONSULT.

6.

Check if the “C1A17” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”. 

Is “C1A17” detected as the current malfunction?

YES

>> Refer to 

BRC-285, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010727825

1.

REPLACE DISTANCE SENSOR

>> Replace distance sensor. Refer to 

BRC-304, "Removal and Installation"

.

DTC

Trouble diagnosis name

DTC detecting condition

C1A17

ICC SENSOR MALF
(ICC sensor malfunction)

Distance sensor is malfunctioning.

BRC-284

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A18 RADAR AIMING INCMP

C1A18 RADAR AIMING INCMP

DTC Logic

INFOID:0000000010727826

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Distance sensor aiming adjustment not performed.
• Distance sensor aiming adjustment interrupted.

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more.

3.

Start the engine.

4.

Turn the FEB system ON. 

5.

Perform “All DTC Reading” with CONSULT.

6.

Check if the “C1A18” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”. 

Is “C1A18” detected as the current malfunction?

YES

>> Refer to 

BRC-285, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010727827

1.

ADJUST DISTANCE SENSOR

Perform distance sensor Initial vertical alignment and distance sensor alignment.

>> Refer to 

BRC-260, "Description"

 and 

BRC-262, "Description"

. 

DTC

Trouble diagnosis name

DTC detecting condition

C1A18

LASER AIMING INCMP
(Laser aiming incomplete)

Distance sensor not adjusted.

C1A21 UNIT HIGH TEMP

BRC-285

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

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BRC

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C1A21 UNIT HIGH TEMP

DTC Logic

INFOID:0000000010766427

DTC DETECTION LOGIC

POSSIBLE CAUSE

Temperature around the distance sensor becomes extremely low or high

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more.

3.

Start the engine.

4.

Turn the FEB system ON. 

5.

Perform “All DTC Reading” with CONSULT.

6.

Check if the “C1A21” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”. 

Is “C1A21” detected as the current malfunction?

YES

>> Refer to 

BRC-285, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010766428

1.

CHECK ENGINE COOLING SYSTEM

Check for any malfunctions in engine cooling system. 

Is engine cooling system normal?

YES

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

.

NO

>> Repair engine cooling system. 

DTC

Trouble diagnosis name

DTC detecting condition

C1A21

UNIT HIGH TEMP
(Unit high temperature)

Temperature detected by the temperature sensor integrated in distance sensor 
remains more than 105 

°

C (221 

°

F) for 5 seconds or more