Nissan X-Trail 32. Instruction — part 203

BRC-278

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A14 ECM

C1A14 ECM

DTC Logic

INFOID:0000000010766629

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Accelerator pedal position sensor
• ECM
• Distance sensor

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC “C1A14” is displayed with DTC “U1000”, first diagnose the DTC “U1000”.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to

BRC-296, "DTC Logic"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Operate the FEB system and drive.

CAUTION:

Always drive safely.

3.

Stop the vehicle.

4.

Perform “All DTC Reading” with CONSULT.

5.

Check if the “C1A14” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”.

Is “C1A14” detected as the current malfunction?

YES

>> Refer to

BRC-278, "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:0000000010766630

1.

CHECK DTC PRIORITY

If DTC “C1A14” is displayed with DTC “U1000”, first diagnose the DTC “U1000”.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to

BRC-296, "DTC Logic"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS OF ECM

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”.
Is any DTC detected?

YES

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

EC-109, "DTC Index"

(MR20DD) or

EC-517, "DTC Index"

(QR25DE) or

EC-908, "DTC Index"

(R9M).

NO

>> Replace the distance sensor. Refer to

BRC-304, "Removal and Installation"

.

DTC

Trouble diagnosis name

DTC detecting condition

C1A14

ECM CIRCUIT
(ECM circuit)

If ECM is malfunctioning

C1A15 GEAR POSITION

BRC-279

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

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BRC

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C1A15 GEAR POSITION

DTC Logic

INFOID:0000000010766632

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Input speed sensor
• Vehicle speed sensor A/T (output speed sensor)
• TCM

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC “C1A15” is displayed with DTC “U1000”, “C1A03” or “C1A04” first diagnose the DTC “U1000”, “C1A03”
or “C1A04”

Is applicable DTC detected?

YES

>>

Perform diagnosis of applicable.

• U1000: Refer to

BRC-296, "DTC Logic"

• C1A03: Refer to

BRC-271, "DTC Logic"

• C1A04: Refer to

BRC-273, "DTC Logic"

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the FEB system ON.

3.

Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more.

CAUTION:

Always drive safely.

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT.

6.

Check if “C1A15” is detected as the current malfunction in the “Self Diagnostic Result” of “LASER/
RADAR”.

Is “C1A15” detected as the current malfunction?

YES

>> Refer to

BRC-279, "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:0000000010766633

1.

CHECK DTC PRIORITY

If DTC “C1A15” is displayed with DTC “U1000”, “C1A03” or “C1A04” first diagnose the DTC “U1000”, “C1A03”
or “C1A04”

Is applicable DTC detected?

YES

>>

Perform diagnosis of applicable.

• U1000: Refer to

BRC-296, "DTC Logic"

• C1A03: Refer to

BRC-271, "DTC Logic"

• C1A04: Refer to

BRC-273, "DTC Logic"

NO

>> GO TO 2.

2.

CHECK VEHICLE SPEED SIGNAL

DTC

Trouble diagnosis name

DTC detecting condition

C1A15

GEAR POSITION
(Gear position)

A mismatch between an current gear position signal transmitted from TCM via
ECM and a gear position calculated by the distance sensor continues for approx-
imately 11 minutes or more

BRC-280

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A15 GEAR POSITION

Check that “VHCL SPEED SE” operates normally in “DATA MONITOR” of “LASER/RADAR”.

CAUTION:

Be careful of the vehicle speed.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK GEAR POSITION

Check that “GEAR” operates normally in “DATA MONITOR” of “LASER/RADAR”.

CAUTION:

Be careful of the vehicle speed.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK GEAR POSITION SIGNAL

Check that “GEAR” operates normally in “DATA MONITOR” of “TRANSMISSION”.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CHECK INPUT SPEED SENSOR SIGNAL

Check that “INPUT SPEED” operates normally in “DATA MONITOR” of “TRANSMISSION”.
Is the inspection result normal?

YES

>> Replace the distance sensor. Refer to

BRC-304, "Removal and Installation"

.

NO

>> GO TO 6.

6.

CHECK TCM SELF-DIAGNOSIS RESULTS

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-288, "DTC Index"

(Gasoline engine models) or

TM-529, "DTC Index"

(Diesel engine models).

NO

>> Replace the distance sensor. Refer to

BRC-304, "Removal and Installation"

.

7.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading”.

2.

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

Is any DTC detected?

YES

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

BRC-84, "DTC Index"

.

NO

>> Replace the distance sensor. Refer to

BRC-304, "Removal and Installation"

.

C1A16 RADAR BLOCKED

BRC-281

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

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C1A16 RADAR BLOCKED

DTC Logic

INFOID:0000000010766415

DTC DETECTION LOGIC

NOTE:
DTC “C1A16” may be detected under the following conditions. (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”.)
• When contamination or foreign materials adhere to the distance sensor area of the front bumper
• When driving while it is snowing or when frost forms on the distance sensor area of the front bumper
• When distance sensor area of the front bumper is temporarily fogged

POSSIBLE CAUSE

• Stain or foreign materials is deposited
• Cracks or scratches exist

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the FEB system ON.

3.

Perform “All DTC Reading” with CONSULT.

4.

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

Is “C1A16” detected as the current malfunction?

YES

>> Refer to

BRC-281, "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:0000000010766416

1.

VISUAL CHECK 1

Check the contamination and foreign matter on the distance sensor area of the front bumper.

Does contamination or foreign materials adhere?

YES

>> Wipe out the contamination and foreign matter on the distance sensor area of the front bumper.

NO

>> GO TO 2.

2.

VISUAL CHECK 2

1.

Remove the front bumper. Refer to

EXT-15, "Removal and Installation"

.

2.

Check distance sensor for contamination and foreign matter.

Does contamination or foreign matter adhere?

YES

>> Wipe out the contamination and foreign matter from the distance sensor.

NO

>> GO TO 3.

3.

VISUAL CHECK 3

Check distance sensor for cracks and scratches.
Is it found?

YES

>> Replace the distance sensor. Refer to

BRC-304, "Removal and Installation"

.

NO

>> GO TO 4.

DTC

Trouble diagnosis name

DTC detecting condition

C1A16

RADAR BLOCKED
(Radar blocked)

Inclusion of dirt or stains on the distance sensor area of the front bumper