Nissan X-Trail 32. Manual - part 201

BRC-270

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

DTC Logic

INFOID:0000000010766405

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Connector, harness, fuse
• Distance sensor

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 “C1A01” or “C1A02” is detected as the current malfunction in “Self Diagnostic Result” of
“RADAR”.

Is “C1A01” or “C1A02” detected as the current malfunction?

YES

>> Refer to 

BRC-270, "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:0000000010766406

1.

CHECK DISTANCE SENSOR POWER SUPPLY AND GROUND CIRCUIT

Check power supply and ground circuit of distance sensor. Refer to 

BRC-300, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

.

NO

>> Repair or replace the malfunctioning parts.

DTC

Trouble diagnosis name

DTC detecting condition

C1A01

POWER SUPPLY CIR
(Power supply circuit)

The battery voltage sent to distance sensor remains less than 7.9 V for 5 sec-
onds

C1A02

POWER SUPPLY CIR 2
(Power supply circuit 2)

The battery voltage sent to distance sensor remains more than 19.3 V for 5 
seconds

C1A03 VEHICLE SPEED SENSOR

BRC-271

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

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BRC

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C1A03 VEHICLE SPEED SENSOR

DTC Logic

INFOID:0000000010766623

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Wheel speed sensor
• ABS actuator and electric unit (control unit)
• Vehicle speed sensor A/T (output speed sensor)
• TCM
• Distance sensor

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

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

Is applicable DTC detected?

YES

>>

Perform diagnosis of applicable.

• U1000: Refer to 

BRC-296, "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 30 km/h (19 MPH) or more. 

CAUTION:

Always drive safely. 

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT. 

6.

Check if the “C1A03” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”. 

Is “C1A03” detected as the current malfunction?

YES

>> Refer to 

BRC-271, "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:0000000010766624

1.

CHECK DTC PRIORITY

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

Is applicable DTC detected?

YES

>>

Perform diagnosis of applicable.

• U1000: Refer to 

BRC-296, "DTC Logic"

• C1A04: Refer to 

BRC-273, "DTC Logic"

NO

>> GO TO 2.

2.

CHECK DATA MONITOR

1.

Start the engine.

DTC

Trouble diagnosis name

DTC detecting condition

C1A03

VHCL SPEED SE CIRC
(Vehicle speed sensor circuit)

If the vehicle speed signal (wheel speed) from ABS actuator and electric unit (con-
trol unit) and the A/T vehicle speed sensor signal (output shaft revolution signal) 
from TCM, received by the distance sensor via CAN communication, are inconsis-
tent

BRC-272

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

C1A03 VEHICLE SPEED SENSOR

2.

Drive the vehicle. 

3.

Check that the value of “VHCL SPD AT” is almost the same as the value of “VHCL SPEED SE” in “DATA
MONITOR” of “LASER/RADAR”. 

CAUTION:

Be careful of the vehicle speed. 
Is the inspection result normal?

YES

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

. 

NO

>> GO TO 3.

3.

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

BRC-247, "DTC Index"

.

NO

>> GO TO 4.

4.

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

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-247, "DTC Index"

. 

NO

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

. 

C1A04 ABS/TCS/VDC SYSTEM

BRC-273

< DTC/CIRCUIT DIAGNOSIS >

[FORWARD EMERGENCY BRAKING]

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BRC

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C1A04 ABS/TCS/VDC SYSTEM

DTC Logic

INFOID:0000000010766625

DTC DETECTION LOGIC

POSSIBLE CAUSE

ABS actuator and electric unit (control unit)

FAIL-SAFE

FEB system is canceled.

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC “C1A04” 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.

Turn the FEB system ON.

3.

Perform “All DTC Reading” with CONSULT. 

4.

Check if the “C1A04” is detected as the current malfunction in “Self Diagnostic Result” of “LASER/
RADAR”. 

Is “C1A04” detected as the current malfunction?

YES

>> Refer to 

BRC-273, "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:0000000010766626

1.

CHECK DTC PRIORITY

If DTC “C1A04” 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.

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

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-188, "Diagnosis Procedure"

.

NO

>> Replace the distance sensor. Refer to 

BRC-304, "Removal and Installation"

. 

DTC

Trouble diagnosis name

DTC detecting condition

C1A04

ABS/TCS/VDC CIRC
(ABS/TCS/VDC circuit)

If a malfunction occurs in the VDC/TCS/ABS system