Nissan Qashqai J11. Manual - part 735

U0300 CAN COMMUNICATION DATA

TM-515

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

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U0300 CAN COMMUNICATION DATA

DTC Logic

INFOID:0000000010245589

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 5 seconds or more.

2.

Check the DTC.

Is “U0300” detected?

YES

>> Go to 

TM-515, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010245590

1.

CONTROL UNIT CHECK 

Check the number of control units replaced before “U0300” is detected. 
Is one control unit replaced? 

YES

>> The specification of the control unit replaced may be incorrect. Check the part number and the

specification. 

NO

>> GO TO 2.

2.

CONTROL UNIT CHECK

With CONSULT

1.

Remove one of the control unit replaced. 

2.

Assemble the old control unit before replacement. 

3.

Turn ignition switch ON, and wait for 2 seconds or more.

4.

Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “U0300”detected?

YES

>> Turn OFF the ignition switch and check other control units in the same manner. 

NO

>> The specification of the control unit removed may be incorrect. Check the part number and the

specification. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

U0300

CAN COMM DATA
(Internal Control Module Soft-
ware Incompatibility)

When the ignition switch is ON, the data length 
transmitted from each control unit is shorter 
than the specified length and the status contin-
ues for 2 seconds or more. 

Control unit other than TCM

TM-516

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010245591

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:0000000010245592

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-516, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010245593

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)

U110F LOST COMMUNICATION (ECM)

TM-517

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

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U110F LOST COMMUNICATION (ECM)

DTC Logic

INFOID:0000000010438743

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-518, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010438744

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

U110F

LOST COMM (ECM)
(Lost Communication With 
ECM)

When the ignition switch is ON, TCM is un-
able to receive the CAN communications sig-
nal from ECM continuously for 2 seconds or 
more.

• ECM
• Harness or connector (CAN communi-

cation line is open or shorted)

TM-518

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)

U1111 LOST COMMUNICATION (CHASSIS CONTROL MODULE)

DTC Logic

INFOID:0000000010438745

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-518, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010438746

For the diagnosis procedure, refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

U1111

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

When the ignition switch is ON, TCM is un-
able to receive the CAN communications 
signal from chassis control module contin-
uously for 2 seconds or more.

• Chassis control module
• Harness or connector (CAN communi-

cation line is open or shorted)