Nissan Leaf. Manual — part 282
U1000 CAN COMM CIRCUIT
BR-449
< DTC/CIRCUIT DIAGNOSIS >
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Diagnosis Procedure
INFOID:0000000010123093
BR-450
< DTC/CIRCUIT DIAGNOSIS >
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000010123094
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 error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected 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:0000000010123095
DTC DETECTION LOGIC
DTC REPRODUCTION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1. Turn the power switch OFF to ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
2. Repeat step 1 two or more times.
CAUTION:
Be sure to wait for 5 seconds or more after turning the power switch OFF.
3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for
3 minutes or more with all doors closed.
CAUTION:
Never operate the vehicle while waiting.
5. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
6. Start CONSULT and erase self-diagnosis result of “BRAKE”.
7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for
3 minutes or more with all doors closed.
CAUTION:
Never operate the vehicle while waiting.
9. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
11. Release brake pedal.
12. Start CONSULT and perform “BRAKE” self-diagnosis.
Is DTC “U1010” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
DTC
Display item
Malfunction detection condition
Possible causes
U1010
CONTROL UNIT (CAN)
A malfunction is detected at initial diagnosis of CAN
controller of electrically-driven intelligent brake unit.
Electrically-driven intelligent
brake unit
U1010 CONTROL UNIT (CAN)
BR-451
< DTC/CIRCUIT DIAGNOSIS >
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Diagnosis Procedure
INFOID:0000000010123096
1.
CHECK SELF-DIAGNOSIS RESULTS
Check for failures in the pin terminals and connections of the electrically-driven intelligent brake unit harness
connector.
Is the inspection result normal?
YES
>> Replace the electrically-driven intelligent brake unit. Refer to
BR-510, "Removal and installation"
NO
>> Repair or replace error-detected parts.
BR-452
< DTC/CIRCUIT DIAGNOSIS >
U1510 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) COMMUNICA-
TION
U1510 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) COMMU-
NICATION
DTC Logic
INFOID:0000000010123097
DTC DETECTION LOGIC
*: CAN communications line between electrically-driven intelligent brake unit and ABS actuator control unit
DTC REPRODUCTION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1. Turn the power switch OFF to ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
2. Repeat step 1 two or more times.
CAUTION:
Be sure to wait for 5 seconds or more after turning the power switch OFF.
3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for
3 minutes or more with all doors closed.
CAUTION:
Never operate the vehicle while waiting.
5. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
6. Start CONSULT and erase self-diagnosis result of “BRAKE”.
7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.
8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for
3 minutes or more with all doors closed.
CAUTION:
Never operate the vehicle while waiting.
9. Turn the power switch ON without depressing the brake pedal.
CAUTION:
Never set the vehicle to READY.
10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.
11. Release brake pedal.
12. Start CONSULT and perform “BRAKE” self-diagnosis.
Is DTC “U1510” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010123098
1.
CHECK 12V BATTERY
DTC
Display item
Malfunction detection condition
Possible causes
U1510
BRAKE CONTROL COMMUNI-
CATION
Signals from brake communications line
*
are not sent
or received continuously for 4 seconds or more.
• Harness or connector
• Electrically-driven intelligent
brake unit
• ABS actuator and electric unit
(control unit)
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