Nissan Sentra manuals

Nissan Sentra Service Manual: Basic inspection

Inspection and adjustment

Additional service when replacing control unit (bcm)

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Description

Before replacement

When replacing bcm, save or print current vehicle specification with consult configuration before replacement.

Note:

If “Before Replace ECU” cannot be used, use the “After Replace ECU” or “Manual Configuration” after replacing BCM.

After replacement

Caution:

When replacing bcm, you must perform “after replace ecu” with consult.

When replacing bcm, perform the system initialization (nats).

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work Procedure

1.Saving vehicle specification

Enter "re/programming, configuration" and perform “before replace ecu” to Consult


Enter "re/programming, configuration" and perform “before replace ecu” to save or print current vehicle specification.

Note:

If “before replace ecu” cannot be used, use the "after replace ecu" or "manual configuration" after replacing bcm.

>> Go to 2.

2.Replace bcm

Replace BCM. Refer to BCS-73, "Removal and Installation".

>> GO TO 3.

3.Writing vehicle specification

Consult


  1. Enter "Re/Programming, Configuration".
  2. If “before replace ecu” operation was performed, automatically an "operation log selection" screen will be displayed. Select the applicable file from the "saved data list" and press “confirm” to write vehicle specification. Refer to bcs-60, "additional service when replacing control unit (bcm) : work procedure".
  3. If “before replace ecu” operation was not performed, select "after replace ecu" or "manual configuration" to write vehicle specification. Refer to bcs-60, "additional service when replacing control unit (bcm) : work procedure".

>> Go to 4.

4.Initialize bcm (nats)

Perform bcm initialization. (Nats)

>> Work End.

Configuration (bcm)

Configuration (bcm) : description

Vehicle specification needs to be written with consult because it is not written after replacing bcm.

Configuration has three functions as follows:

Function

Description

"Before replace ecu"
  • Reads the vehicle configuration of current BCM.
  • Saves the read vehicle configuration.
"After Replace ECU" Writes the vehicle configuration with manual selection.
"Select saved data list" Writes the vehicle configuration with saved data.

CAUTION:

Configuration (bcm) : work procedure

1.WRITING MODE SELECTION

Select “Reprogramming, Configuration” of BCM. CONSULT


Select “Reprogramming, Configuration” of BCM.

When writing saved data>>GO TO 2.

When writing manually>>GO TO 3.

2.PERFORM “SAVED DATA LIST”

Automatically “Operation Log Selection” window will display if “Before CONSULT


Automatically “Operation Log Selection” window will display if “Before Replace ECU” was performed. Select applicable file from the “Save Data List” and press “Confirm”.

>> Work End.

3.PERFORM “AFTER REPLACE ECU” OR “MANUAL CONFIGURATION”

CONSULT


  1. Select “After Replace ECU” or “Manual Configuration”.
  2. Identify the correct model and configuration list. Refer to BCS-62, "CONFIGURATION (BCM) : Configuration list".
  3. Confirm and/or change setting value for each item.

CAUTION:

Thoroughly read and understand the vehicle specification. ECU control may not operate normally if the setting is not correct.

  1. Select “Next”.

CAUTION:

Make sure to select “Next”, confirm each setting value and press “OK” even if the indicated configuration of brand new BCM is same as the desirable configuration. If not, configuration which is set automatically by selecting vehicle model cannot be memorized.

  1. When "Completed", select "End".

>> GO TO 4.

4.OPERATION CHECK

Confirm that each function controlled by BCM operates normally.

>> Work End.

Configuration (bcm) : configuration list

CAUTION:

Thoroughly read and understand the vehicle specification. Incorrect settings may result in abnormal control of ECU.

Items which confirm vehicle


specifications Items which confirm vehicle
specifications

Wiring diagram
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