Nissan X-Trail 32. Instruction — part 1650

PB-126

< DTC/CIRCUIT DIAGNOSIS >

U0129 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) COMMUNICA-

TION

U0129 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) COMMU-
NICATION

DTC Description

INFOID:0000000010723004

DTC DETECTION LOGIC

POSSIBLE CAUSE

• ABS actuator and electric unit (control unit)
• CAN communication line
• Electric parking brake control module

FAIL-SAFE

• Automatic apply and release are prohibited.
• Brake force is degraded.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn the ignition switch OFF
and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1.

Turn the ignition switch OFF to ON.

CAUTION:

Be sure to wait for 10 seconds after turning ignition switch OFF or ON.

2.

Push the parking brake switch.

CAUTION:

• Set the select lever in the P position.
• Depress the brake pedal.

3.

Pull the parking brake switch.

4.

Perform self-diagnosis for “EHS/PKB”.

Is DTC “U0129” detected?

YES

>> Proceed to

PB-126, "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:0000000010723005

1.

ERFORM SELF-DIAGNOSIS (1)

With CONSULT

Perform self-diagnosis for “ABS”.
Is DTC detected?

YES

>> Check the DTC. Refer to

BRC-84, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS (2)

With CONSULT

DTC

Display Item

(Trouble diagnosis content)

Malfunction detected condition

U0129

BRAKE SYSTEM CONTROL
MODULE
(BRAKE SYSTEM CONTROL
MODULE)

When CAN communication signal with ABS actuator and electric unit (control unit) is
not continuously received for 2 seconds or more.

U0129 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) COMMUNICA-

TION

PB-127

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

G

H

I

J

K

L

M

A

B

PB

N

O

P

1.

Turn the ignition switch OFF to ON.

CAUTION:

Be sure to wait for 10 seconds or more after turning the ignition switch OFF.

2.

Erase self-diagnosis result for “EHS/PKB”.

3.

Repeat the parking brake switch operation (pull and push) five times.

4.

Perform self-diagnosis for “EHS/PKB”.

Is DTC “U0129”, “U1000” detected?

YES (“U0129”)>>Replace the electric parking brake control module. Refer to

PB-153, "Removal and Installa-

tion"

.

YES (“U1000”)>>Proceed to

LAN-17, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END

PB-128

< DTC/CIRCUIT DIAGNOSIS >

U0140 BCM COMMUNICATION

U0140 BCM COMMUNICATION

DTC Description

INFOID:0000000010723006

DTC DETECTION LOGIC

POSSIBLE CAUSE

• BCM
• CAN communication line
• Electric parking brake control module

FAIL-SAFE

Automatic apply and release are prohibited.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn the ignition switch OFF
and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1.

Turn the ignition switch OFF to ON.

CAUTION:

Be sure to wait for 10 seconds after turning ignition switch OFF or ON.

2.

Push the parking brake switch.

CAUTION:

• Set the select lever in the P position.
• Depress the brake pedal.

3.

Pull the parking brake switch.

4.

Perform self-diagnosis for “EHS/PKB”.

Is DTC “U0140” detected?

YES

>> Proceed to

PB-128, "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:0000000010723007

1.

ERFORM SELF-DIAGNOSIS (1)

With CONSULT

Perform self-diagnosis for “BCM”.

Is DTC detected?

YES

>> Check the DTC. Refer to

BCS-78, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS (2)

With CONSULT

1.

Turn the ignition switch OFF to ON.

CAUTION:

Be sure to wait for 10 seconds or more after turning the ignition switch OFF.

2.

Erase self-diagnosis result for “EHS/PKB”.

DTC

Display Item

(Trouble diagnosis content)

Malfunction detected condition

U0140

BCM
(BCM)

When CAN communication signal with BCM is not continuously received for 2 sec-
onds or more.

U0140 BCM COMMUNICATION

PB-129

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

G

H

I

J

K

L

M

A

B

PB

N

O

P

3.

Repeat the parking brake switch operation (pull and push) five times.

4.

Perform self-diagnosis for “EHS/PKB”.

Is DTC “U0140”, “U1000” detected?

YES (“U0410”)>>Replace the electric parking brake control module. Refer to

PB-156, "Removal and Installa-

tion"

.

YES (“U1000”)>>Proceed to

LAN-17, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END