Nissan Qashqai J11. Manual - part 400

ECK-160

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

U0111 LIN COMMUNICATION

U0111 LIN COMMUNICATION

DTC Logic

INFOID:0000000010434238

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-160, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010434239

1.

CHECK LIN COMMUNICATION CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector and alternator harness connector.

3.

Check the continuity between ECM harness connector and alternator harness connector.

4.

Also check harness for short to power and short to ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

REPLACE ALTERNATOR

1.

Replace alternator.

2.

Erase DTC.

3.

Perform DTC confirmation procedure again. Refer to 

ECK-160, "DTC Logic"

.

Is DTC detected again?

YES

>> Replace ECM.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U0111

Lost communication with battery energy 
control module “A”
• 1.DEF: COMPONENT PROTECTION 

TIME-OUT

ECM detects LIN communication error.

• Harness and connectors

(LIN communication circuit is 
open or shorted.)

• Alternator
• ECM

+

−

Continuity

ECM

Alternator

Connector

Terminal

Connector

Terminal

F81

141

F54

2

Existed

U0121 CAN COMMUNICATION

ECK-161

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

U0121 CAN COMMUNICATION

DTC Logic

INFOID:0000000010434240

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-161, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010434241

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

U0121

MLTIPLXD TRACTION CNTRL CONN
[Lost communication with anti-lock brake 
system (ABS) control module]
• 1.DEF: INVALID SOURCE COMPUT-

ER MULTIPLEX SIGNALS

• 2.DEF: INVALID SOURCE COMPUT-

ER MULTIPLEX SIGNALS

• 3.DEF: CIRCUIT QUANTITY NOT 

PLAUSIBLE

When ECM is not receiving CAN commu-
nication signal between ABS actuator 
and electric unit (control unit).

ABS actuator and electric unit 
(control unit)

ECK-162

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

U0298 COMMUNICATION WITH DC/DC CONVERTER CONTROL UNIT

U0298 COMMUNICATION WITH DC/DC CONVERTER CONTROL UNIT

DTC Logic

INFOID:0000000010434242

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

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. (Stop the engine.)

5.

Touch “CANCEL” and restart the engine.

6.

Check DTC.

Without CONSULT

1.

Activate stop/start system. Refer to 

ECK-39, "STOP/START SYSTEM : System Description"

.

CAUTION:

Always drive vehicle at a safe speed.

2.

Restart the engine.

3.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECK-162, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010434243

1.

CHECK VOLTAGE STABILIZER SIGNAL

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, and then check the voltage between DC/DC converter harness
connector and ground as per the following conditions.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

U0298

COMMUNICATION ERROR 
(LOST)
(Lost communication with DC 
to DC converter control module 
“A”)

During the restart, the DC/DC converter 
status of the engine communication line 
does not show an decrease in voltage 
after an ECM transmitted voltage stabi-
lizer signal is changed from battery volt-
age to 2.0 V or less.

• Harness and connectors

(Voltage stabilizer signal line is open or cir-
cuit shorted.)

• DC/DC converter

+

–

Condition

Voltage

(Approx.)

DC/DC converter

Connector

Terminal

M22

9

Ground

While cranking with restart

2.0 V or less

Except above

Battery voltage

U0298 COMMUNICATION WITH DC/DC CONVERTER CONTROL UNIT

ECK-163

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK VOLTAGE STABILIZER SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect DC/DC converter harness connector and alternator harness connector .

3.

Disconnect ECM harness connector.

4.

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

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

3.

CHECK INTERMITTENT INCIDENT

Perform intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace DC/DC converter. Refer to 

ECK-402, "Removal and Installation"

.

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 ECM. Refer to 

ECK-399, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

+

–

Continuity

DC/DC converter

ECM

Connector

Terminal

Connector

Terminal

M22

9

F80

51

Existed