Nissan Sentra. Manual - part 801

DIAGNOSIS AND REPAIR WORK FLOW

SRC-39

< BASIC INSPECTION >

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1.

INTERVIEW THE CUSTOMER FOR THE SYMPTOM

Interview the customer for the symptom (the condition and the environment when the incident/malfunction

occurs).

>> GO TO 2.

2.

CHECK SYMPTOM

Check the symptom from the customer information.

>> GO TO 3.

3.

CHECK WARNING LAMP OPERATION

Check air bag warning lamp operation in the user mode. Refer to 

SRC-15, "On Board Diagnosis Function"

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Are any malfunction detected?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK LOW VOLTAGE 

Check low voltage. 
Are any malfunction detected?

YES

>> GO TO 9.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

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5.

CHECK SELF DIAGNOSTIC RESULTS

Check self diagnostic result with CONSULT or diagnosis mode.

If it is impossible to switch to diagnosis mode, follow the same procedure that DTC is not detected.

NOTE:

Perform the following procedure if DTC is detected.

• Record DTC (Print them out with CONSULT.)

• Erase self diagnostic result.

• Study the relationship between the malfunction that DTC or air bag warning lamp indicates and the symptom

that the customer describes.

• Check related service bulletins for information.
Is DTC detected?

YES

>> GO TO 6.

NO

>> GO TO 7.

6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the DTC.

>> GO TO 8.

7.

PERFORM DIAGNOSIS ACCORDING TO WARNING LAMP OPERATION

1. Check air bag warning lamp operation in the user mode. Refer to 

SRC-15, "On Board Diagnosis Func-

tion"

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2. Perform Diagnosis Procedure for the air bag warning lamp operation. Refer to 

SRC-15, "On Board Diag-

nosis Function"

 (USER MODE).

>> GO TO 9.

8.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the DTC.

>> GO TO 9.

9.

REPAIR OR REPLACE THE MALFUNCTION PART

SRC-40

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

Repair or replace the malfunctioning part.

>> GO TO 10.

10.

FINAL CHECK

Check self diagnostic result and air bag warning lamp operation in the user mode.
Is the malfunction repaired?

YES

>> INSPECTION END

NO 

>> GO TO 2.

INSPECTION AND ADJUSTMENT

SRC-41

< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

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

INFOID:0000000009757943

WARNING:

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

seat or servicing the occupant classification system. 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:0000000009757944

WORK PROCEDURE WHEN REPLACING OCS CONTROL UNIT

1.

PERFORM ZERO POINT RESET

Perform zero point reset. Refer to 

SRC-41, "ZERO POINT RESET : Special Repair Requirement"

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>>  Inspection End.

ZERO POINT RESET
ZERO POINT RESET : Description

INFOID:0000000009757945

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:0000000009757946

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 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 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 flashes 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-42

< BASIC INSPECTION >

INTERMITTENT INCIDENT

INTERMITTENT INCIDENT

Inspection Procedure

INFOID:0000000009757947

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.

Trouble Diagnosis with CONSULT

INFOID:0000000009757948

CHECK SRS REPAIR HISTORY

Refer to 

SRC-17, "SRS History Check"

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