Nissan Qashqai J11. Manual - part 680

U1000 CAN COMM CIRCUIT

TM-295

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

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U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010589282

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independently). In CAN communication, control units are con-
nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000010589283

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U1000” detected?

YES

>> Go to 

TM-295, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010589284

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

U1000

CAN COMM CIRCUIT
(CAN Communication Line)

When the ignition switch is ON, TCM cannot 
send the CAN communication signal continu-
ously for 2 seconds or more. 

Harness or connector
(CAN communication line is open or 
shorted)

TM-296

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

U110F LOST COMMUNICATION (ECM)

U110F LOST COMMUNICATION (ECM)

DTC Logic

INFOID:0000000010589285

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U110F” detected?

YES

>> Go to 

TM-296, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010589286

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

U110F

LOST COMM (ECM)
(Lost Communication With 
ECM)

When the ignition switch is ON, TCM is unable 
to receive the CAN communications signal 
from ECM continuously for 2 seconds or more.

• ECM
• Harness or connector

(CAN communication line is open or 
shorted)

U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)

TM-297

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

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U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)

DTC Logic

INFOID:0000000010589287

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U1111” detected?

YES

>> Go to 

TM-297, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010589288

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

U1111

LOST COMM (CHASSIS 
CONT MDUL)
(Lost Communication With 
Chassis Control Module)

When the ignition switch is ON, TCM is unable 
to receive the CAN communications signal 
from chassis control module continuously for 2 
seconds or more.

• Chassis control module
• Harness or connector

(CAN communication line is open or 
shorted)

TM-298

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

U1117 LOST COMMUNICATION (ABS)

U1117 LOST COMMUNICATION (ABS)

DTC Logic

INFOID:0000000010589289

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and wait for 5 seconds or more.

2.

Check the DTC.

Is “U1117” detected?

YES

>> Go to 

TM-298, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010589290

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

U1117

LOST COMM (ABS)
(Lost Communication With 
ABS)

When the ignition switch is ON, TCM is unable 
to receive the CAN communications signal 
from ABS actuator and electric unit (control 
unit) continuously for 2 seconds or more.

• ABS actuator and electric unit (control 

unit)

• Harness or connector

(CAN communication line is open or 
shorted)