Nissan Qashqai J11. Manual - part 504

EC9-172

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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

TROL UNIT)]

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

DTC Logic

INFOID:0000000010499284

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC U0315 can not duplicate.

>> Proceed to 

EC9-172, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010499285

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: ALIVE COUNTER INCOR-

RECT

• 4.DEF: CIRCUIT QUANTITY NOT 

PLAUSIBLE

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

EC9-173

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

U0415 CAN COMMUNICATION

DTC Logic

INFOID:0000000010309060

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC U0415 can not duplicate.

>> Proceed to 

EC9-173, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309061

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 CN-
TRL CONN
[Invalid data received from 
anti-lock brake system (ABS) 
control module]
• 1.DEF: IMPLAUSIBLE SIG-

NAL

• 2.DEF: INVALID SOURCE 

COMPUTER MULTIPLEX 
SIGNALS

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

ABS actuator and electric unit 
(control unit)

EC9-174

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

B1900 DC/DC CONVERTER

B1900 DC/DC CONVERTER

DTC Logic

INFOID:0000000010309073

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 10 seconds or more to start this procedure.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-1

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-174, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1.

Start the engine and warm it up to normal operating temperature.

2.

Press start/stop OFF switch and check that the switch indicator is ON.

3.

Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

4.

Touch “START” and operate stop/start system. (engine stop.)

5.

Touch “CANCEL” and restart the engine.

6.

Check DTC.

Without CONSULT

1.

Activate stop/start system. Refer to 

EC9-39, "STOP/START SYSTEM : System Description (M/T models)"

(M/T models), 

EC9-47, "STOP/START SYSTEM : System Description (CVT models)"

 (CVT models).

CAUTION:

Always drive vehicle at a safe speed.

2.

Restart the engine.

3.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-174, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309074

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check that the following fuse is not fusing.

Is the fuse fusing?

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

B1900

—
(—)

DC/DC converter detects power supply 
input 1 is 5.0 V or less and difference 
between power supply input 1 and pow-
er supply input 2 is 4.0 V or more for 3 
seconds.

• Harness and connectors

(DC/DC converter power supply input 1 cir-
cuit is open or shorted.)

• DC/DC converter

Fuse No.

Capacity

F/L-O

30 A

B1900 DC/DC CONVERTER

EC9-175

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

YES

>> Replace the fuse after repairing the applicable circuit.

NO

>> GO TO 2.

2.

CHECK DC/DC CONVERTER POWER SUPPLY INPUT 1

1.

Disconnect DC/DC converter harness connector.

2.

Check the voltage between DC/DC converter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK DC/DC CONVERTER POWER SUPPLY INPUT 1 CIRCUIT

1.

Disconnect battery negative terminal.

2.

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

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

4.

CHECK INTERMITTENT INCIDENT

Perform intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace DC/DC converter. Refer to 

EC9-408, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

+

−

Voltage

DC/DC converter

Connector

Terminal

M23

1

Ground

Battery voltage

+

−

Continuity

DC/DC converter

Fuse No.

Connector

Terminal

M23

1

F/L-O

Existed