Nissan Qashqai J11. Manual - part 401

ECK-164

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

U0299 LOST COMMUNICATION (DC/DC CONVERTER)

U0299 LOST COMMUNICATION (DC/DC CONVERTER)

DTC Logic

INFOID:0000000010434244

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be
turned OFF and wait for 1 minute or more to start this procedure.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-1

1.

Turn ignition switch ON and wait at least 10 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECK-164, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

1.

Start the engine and let it idle for at least 5 minutes.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECK-164, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010434245

1.

CHECK ENGINE COMMUNICATION LINE

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect DC/DC converter harness connector, alternator harness connector, and active grille shutter
harness connector.

4.

Check the continuity between ECM harness connector and DC/DC converter harness connector.

5.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK INTERMITTENT INCIDENT

Perform intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

U0299

COMMUNICATION ERROR (LOST)
(Lost communication with DC to DC con-
verter control module “B”)

• ECM receives an abnormality signal 

sent from DC/DC converter.

• ECM is not receiving LIN communica-

tion signal sent from DC/DC converter.

• DC/DC converter
• Harness and connectors

(LIN communication line)

+

−

Continuity

ECM

DC/DC converter

Connector

Terminal

Connector

Terminal

F81

141

M22

7

Existed

U0299 LOST COMMUNICATION (DC/DC CONVERTER)

ECK-165

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

YES

>> Replace DC/DC converter. Refer to 

ECK-402, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

ECK-166

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

U0315 CAN COMMUNICATION [ABS ACTUATOR AND ELECTRIC UNIT (CON-

TROL UNIT)]

U0315 CAN COMMUNICATION [ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)]

DTC Logic

INFOID:0000000010434246

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECK-166, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010434247

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check DTC with ABS actuator and electric unit (control unit). Refer to 

BRC-42, "CONSULT Function"

.

Is DTC detected?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Perform trouble shooting relevant to DTC indicated.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

U0315

VEHICLE SPEED
(Software incompatibility with anti-lock 
brake system control module)
• 1.DEF: INVALID SERIAL DATA RE-

CEIVED

• 2.DEF: INVALID SOURCE COMPUT-

ER MULTIPLEX SIGNALS

• 3.DEF: CIRCUIT QUANTITY NOT 

PLAUSIBLE

• 4.DEF: INVALID SOURCE COMPUT-

ER MULTIPLEX SIGNALS

ECM receives invalid signal of vehicle 
speed sent from ABS actuator and elec-
tric unit (control unit).

ABS actuator and electric unit 
(control unit)

U0415 CAN COMMUNICATION

ECK-167

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

U0415 CAN COMMUNICATION

DTC Logic

INFOID:0000000010289717

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC U0415 can not duplicate.

>> Proceed to 

ECK-167, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010289718

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check DTC with ABS actuator and electric unit (control unit). Refer to 

BRC-42, "CONSULT Function"

.

Is DTC detected?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Perform trouble shooting relevant to DTC indicated.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

U0415

MLTIPLXD TRACTION CNTRL CONN
[Invalid data received from anti-lock 
brake system (ABS) control module]
• 1.DEF: IMPLAUSIBLE SIGNAL
• 2.DEF: INVALID SOURCE COMPUT-

ER MULTIPLEX SIGNALS

ECM receives invalid data sent from ABS 
actuator and electric unit (control unit).

ABS actuator and electric unit 
(control unit)