Diagnosis and Repair Work Flow. Work Flow. Work Flow

Work Flow

OVERALL SEQUENCE

DETAILED FLOW

1. INTERVIEW THE CUSTOMER FOR THE SYMPTOM

   1. Interview the customer for the symptom (the condition and the environment when the incident/malfunction occurs).

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   GO TO 2.

2. CHECK SYMPTOM

   1. Check the symptom from the customer information.

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   GO TO 3.

3. CHECK WARNING LAMP OPERATION

   1. Check air bag warning lamp operation in the user mode. Refer to On Board Diagnosis Function.

   Are any malfunction detected?

   YES >>

   GO TO 5.

   NO >>

   GO TO 4.

4. CHECK LOW VOLTAGE

   1. CONSULT

      Check low voltage.

   Are any malfunction detected?

   YES >>

   GO TO 9.

   NO >>

   Check intermittent incident. Refer to Intermittent Incident.

5. CHECK SELF DIAGNOSTIC RESULT

   1. CONSULT

      Check “Self Diagnostic Result” 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.)

      • 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

   1. Perform DTC CONFIRMATION PROCEDURE for the DTC.

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   GO TO 8.

7. PERFORM DIAGNOSIS ACCORDING TO WARNING LAMP OPERATION

   1. 1. Check air bag warning lamp operation in the user mode. Refer to On Board Diagnosis Function.

      2. Perform Diagnosis Procedure for the air bag warning lamp operation. Refer to Trouble Diagnosis with CONSULT or Trouble Diagnosis without CONSULT.

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   GO TO 9.

8. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

   1. Inspect according to Diagnostic Procedure of the DTC.

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   GO TO 9.

9. REPAIR OR REPLACE THE MALFUNCTION PART

   1. Repair or replace the malfunctioning part.

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   GO TO 10.

10. FINAL CHECK

    1. 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.

Configuration (air Bag Diagnosis Sensor Unit). Work Procedure. Work Procedure

Work Procedure

Since vehicle specifications are not yet written in a new air bag diagnosis sensor unit, it is necessary to write then “Re/programming, Configuration” with CONSULT.

Configuration has three functions as follows:

Function		Description
Before Replace ECU		Reads the Nissan Sentra vehicle specification of current air bag diagnosis sensor unit. Saves the read vehicle specification.
After Replace ECU	FAST linked	Searched for by using Global Web-FAST (NISSAN parts catalogue) to automatically write the Type ID* into the air bag diagnosis sensor unit.
	Manual selection	Searched for by using Global Web-FAST (NISSAN parts catalogue) to write the selected Type ID* into the air bag diagnosis sensor unit. Writes the Nissan Sentra vehicle configuration by manual selection. Note: This item is displayed, but not used.

*: For the Type ID, that part number (Nissan Sentra vehicle specification) to be written to the air bag diagnosis sensor unit.

1. CHECKING AIR BAG DIAGNOSIS SENSOR UNIT TYPE ID

   1. CONSULT

      1. Perform ECU setting according to the “C/U setting” procedure in the “CONSULT Operation Manual”. Refer to CONSULT Operation Manual.

      2. Check if the Type ID of the air bag diagnosis sensor unit is displayed on the CONSULT screen.

   Is Type ID displayed?

   YES >>

   GO TO 2.

   NO >>

   GO TO 3.

2. WRITING Nissan Sentra Vehicle SPECIFICATION

   1. CONSULT

      Follow the procedure displayed in CONSULT for writing the saved Nissan Sentra vehicle specification data to the air bag diagnosis sensor unit.

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   GO TO 5.

3. CHECKING AIR BAG DIAGNOSIS SENSOR UNIT TYPE ID

   1. Use Global Web-FAST (NISSAN parts catalogue) to search for the air bag diagnosis sensor unit of the applicable Nissan Sentra vehicle and find the Type ID. Refer to “FAST linked” in the “CONSULT Operation Manual”.

      Note:

      For FAST linked parts, even if a system number cannot be acquired from the air bag sensor unit before replacement, the applicable ECU setting operation can still be performed by acquiring the system number from Global Web-FAST (NISSAN parts catalogue).

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   GO TO 4.

4. WRITING Nissan Sentra Vehicle SPECIFICATION (FAST LINKED)

   1. CONSULT

      Perform ECU setting according to the “C/U setting” procedure in the “CONSULT Operation Manual”. Refer to CONSULT Operation Manual.

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   GO TO 5.

5. CHECK ALL ECU SELF DIAGNOSTIC RESULT

   1. CONSULT

      1. Erase all ECU self-diagnosis results.

      2. Ignition switch OFF.

      3. Ignition switch ON.

      4. Check that all ECU self-diagnosis results have no DTC.

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   Work End.

Inspection and Adjustment. Additional Service When Replacing Control Unit

Description

Description

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.

Special Repair Requirement

Special Repair Requirement

WORK PROCEDURE WHEN REPLACING OCS CONTROL UNIT

1. PERFORM ZERO POINT RESET

   1. Perform zero point reset. Refer to Special Repair Requirement.

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   Inspection End.

Zero Point Reset

Description

Description

Zero point reset is an initializing procedure for the OCS (weight) sensors that must be performed using CONSULT when removing and installing passenger seat or servicing the OCS system. If zero point reset is not performed, the initialization is incomplete and OCS may not operate normally.

• 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”.

Special Repair Requirement

Special Repair Requirement

1. PERFORM ZERO POINT RESET

   1. CONSULT

      1. Perform preliminary checks:

         Note:

         • Level the Nissan Sentra vehicle

         • Minimize vibrations near the vehicle

         • Remove any objects on passenger seat

         • Do not touch the Nissan Sentra vehicle during zero point reset

      2. Select “Start” on “Zero point reset function” screen from “Work support” mode of “OCCUPANT DETECTION”.

      3. “Zero point reset function” starts.

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   GO TO 2.

2. CONFIRM RESET

   1. CONSULT

      Check that “Complete” is displayed on “Zero point reset function”.

      CAUTION:

      • “Complete” may be displayed if the seat has been reinstalled, or “Zero point reset function” 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.

Intermittent Incident. Inspection Procedure

Inspection Procedure

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 Diagnostic Result [CURRENT], but may be viewed on “Self Diagnostic Result [PAST]” if the DTC has not been erased.

Trouble Diagnosis with Consult

Trouble Diagnosis with CONSULT

CHECK SRS REPAIR HISTORY

Refer to SRS History Check.