Nissan Leaf. Manual - part 1109

INSPECTION AND ADJUSTMENT

SRC-37

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

INFOID:0000000010122789

WARNING:

Always perform zero point reset using CONSULT when removing and installing the front passenger

seat or servicing the occupant classification system (OCS). If zero point reset is not performed, the

OCS may not operate normally, which may increase the risk of serious injury in a collision.

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement

INFOID:0000000010122790

WORK PROCEDURE WHEN REPLACING OCS CONTROL UNIT

1.

PERFORM ZERO POINT RESET

Perform zero point reset. Refer to 

SRC-37, "ZERO POINT RESET : Special Repair Requirement"

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>>  Inspection End.

ZERO POINT RESET
ZERO POINT RESET : Description

INFOID:0000000010122791

Zero point reset is an initializing procedure for the OCS (weight) sensors that must be performed using CON-

SULT when removing and installing passenger seat or servicing the OCS system. If zero point reset is not per-

formed, the initialization is incomplete and OCS may not operate normally.

NOTE:

• When reinstalling the passenger seat, the initial value for the OCS sensors may change, and the OCS may

not operate normally.

• When zero point reset is performed after removal and installation of passenger seat, CONSULT displays

“complete”.

ZERO POINT RESET : Special Repair Requirement

INFOID:0000000010122792

1.

PERFORM ZERO POINT RESET

1. Perform preliminary checks:

NOTE:

• Level the vehicle

• Minimize vibrations near the vehicle

• Remove any objects on passenger seat

• Do not touch the vehicle during zero point reset

2. Select START on “Zero point reset function” from, “Work support” of “OCCUPANT DETECTION”.

3. “Zero point reset” starts.

>> GO TO 2.

2.

CONFIRM RESET

1. Check that “Complete” is displayed on “Zero point reset current status”.

CAUTION:

• “Complete” may be displayed if the seat has been reinstalled, or “zero point reset” has already been

performed.

• “Incomplete” may be displayed if a new seat is installed.

• Air bag warning lamp blinks in user mode if zero point reset is “incomplete”.
Is zero point reset status “complete”?

YES

>> Print out “Zero point reset current status” screen. Inspection end.

NO

>> Recheck the preliminary check items and perform zero point reset again.

SRC-38

< BASIC INSPECTION >

INTERMITTENT INCIDENT

INTERMITTENT INCIDENT

Inspection Procedure

INFOID:0000000010122793

INTERMITTENT TROUBLE

An intermittent incident may have occurred in the past but is not being detected currently. This DTC will not be

detected on SELF-DIAG [CURRENT], but may be viewed on SELF-DIAG [PAST] if the DTC has not been

erased.

U1000 CAN COMM CIRCUIT

SRC-39

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

DTC Description

INFOID:0000000010876518

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Modern

vehicle is equipped with many electronic control unit, 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.

CAN Communication Signal Chart. Refer to 

LAN-37, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

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DTC LOGIC

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

Diagnosis Procedure

INFOID:0000000010876519

1.

PERFORM SELF DIAGNOSTIC

1. Turn power switch ON and wait for 2 seconds or more.

2. Check “SELF-DIAG [CAN]” in “special function” of “AIR BAG” using CONSULT.
Is DTC “U1000-01” displayed?

YES

>> Refer to 

SRC-39, "DTC Description"

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NO

>> Refer to 

GI-53, "Intermittent Incident"

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DTC

CONSULT screen items

(Trouble diagnosis content)

DTC detecting condition

U1000–01

CAN COMM CIRCUIT
[CAN communication circuit]

When air bag diagnosis sensor unit cannot communicate CAN communication signal 
continuously for 2 seconds or more.

SRC-40

< DTC/CIRCUIT DIAGNOSIS >

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Description

INFOID:0000000010876965

DTC LOGIC

POSSIBLE CAUSE

Air bag diagnosis sensor unit

FAIL-SAFE

—

Diagnosis Procedure

INFOID:0000000010876966

1.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

When DTC “U1010–49” is detected, replace air bag diagnosis sensor unit.

>> Replace air bag diagnosis sensor unit. Refer to 

SR-38, "Removal and Installation"

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DTC

CONSULT screen items

(Trouble diagnosis content)

DTC detecting condition

U1010–49

CONTROL UNIT (CAN) 
[Control unit (CAN)]

Air bag diagnosis sensor unit detected internal CAN communication circuit malfunction.