Nissan Sentra Service Manual: Additional service when replacing ecm

Description

When replacing ECM, the following procedure must be performed. (For details, refer to EC-135, "Work Procedure".)

PROGRAMMING OPERATION

NOTE:

After replacing with a blank ECM, programming is required to write ECM information. Be sure to follow the procedure to perform the programming.

Work Procedure

1.SAVE ECM DATA

With CONSULT

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Turn ignition switch ON.
4. Select “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
5. Follow the instruction of CONSULT display

NOTE:

• Necessary data in ECM is copied and saved to CONSULT.
• Go to Step 2 regardless of with or without success in saving data.

>> GO TO 2.

2.CHECK ECM PART NUMBER

Check ECM part number to see whether it is blank ECM or not.

NOTE:

• Part number of blank ECM is 23703 - ×××××.
• Check part number when ordering ECM or the one included in the label on the container box.

Is the ECM a blank ECM? YES >> GO TO 3.

NO >> GO TO 5.

3.SAVE ECM PART NUMBER

Read out the part number from the old ECM and save the number, following the programming instructions.

Refer to CONSULT Operation Manual.

NOTE:

• The ECM part number is saved in CONSULT.
• Even when ECM part number is not saved in CONSULT, go to 4.

>> GO TO 4.

4.PERFORM ECM PROGRAMMING

After replacing ECM, perform the ECM programming. Refer to CONSULT Operation Manual.

NOTE:

• Refer to EC-485, "Removal and Installation" for replacement of ECM.
• During programming, maintain the following conditions:

• Ignition switch: ON
• Electric load: OFF
• Brake pedal: Not depressed
• Battery voltage: 12 – 13.5 V (Be sure to check the value of battery voltage by selecting “BATTERY VOLT” in “Data monitor” of CONSULT.)

>> GO TO 6.

5.REPLACE ECM

Replace ECM. Refer to EC-485, "Removal and Installation".

>> GO TO 6.

6.PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNITION KEY IDS

Refer to SEC-61, "ECM : Work Procedure" (With Intelligent Key System) or SEC-174, "ECM : Work Procedure" (Without Intelligent Key System).

>> GO TO 7.

7.CHECK ECM DATA STATUS

Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.

Is the data saved successfully? YES >> GO TO 8.

NO >> GO TO 9.

8.WRITE ECM DATA

With CONSULT

1. Select “WRITING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT
2. Follow the instruction of CONSULT display.

NOTE:

The data saved by “SAVING DATA FOR REPLC CPU” is written to ECM.

>> GO TO 10.

9.PERFORM VIN REGISTRATION

Refer to EC-137, "Work Procedure".

>> GO TO 10.

10.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform Accelerator Pedal Released Position Learning. Refer to EC-138, "Work Procedure".

>> GO TO 11.

11.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform Throttle Valve Closed Position Learning. Refer to EC-139, "Work Procedure".

>> GO TO 12.

12.PERFORM IDLE AIR VOLUME LEARNING

Perform Idle Air Volume Learning. Refer to EC-140, "Work Procedure".

>> END