Nissan Sentra. Manual - part 359

EC-132

< BASIC INSPECTION >

[MRA8DE]

BASIC INSPECTION

2. Rev engine (2,000 to 3,000 rpm) two or three times under no

load, then run engine at idle speed for about 1 minute.

3. Check idle speed.

For procedure, refer to 

EC-479, "Inspection"

.

For specification, refer to 

EC-486, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 4.

4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.

2. Perform 

EC-138, "Work Procedure"

.

>> GO TO 5.

5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-139, "Work Procedure"

.

>> GO TO 6.

6.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-140, "Work Procedure"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 7.

NO

>> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

7.

CHECK TARGET IDLE SPEED AGAIN

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

For procedure, refer to 

EC-479, "Inspection"

.

For specification, refer to 

EC-486, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the Following.

• Check camshaft position sensor (PHASE) and circuit. Refer to 

EC-280, "DTC Logic"

.

• Check crankshaft position sensor (POS) and circuit. Refer to 

EC-277, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace. Then GO TO 4

9.

CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but

this is a rare case.)

2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to 

SEC-61,

"ECM : Work Procedure"

 for the one with INTELLIGENT KEY SYSTEM, or 

SEC-174, "ECM : Work Proce-

dure"

 for the one without INTELLIGENT KEY SYSTEM.

>> GO TO 4.

10.

CHECK IGNITION TIMING

1. Run engine at idle.

PBIA8513J

BASIC INSPECTION

EC-133

< BASIC INSPECTION >

[MRA8DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2. Check ignition timing with a timing light.

For procedure, refer to 

EC-480, "Inspection"

For specification, refer to 

EC-486, "Ignition Timing"

.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1. Stop engine.

2. Perform 

EC-138, "Work Procedure"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-139, "Work Procedure"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-140, "Work Procedure"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 14.

NO

>> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

14.

CHECK TARGET IDLE SPEED AGAIN

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

For procedure, refer to 

EC-479, "Inspection"

.

For specification, refer to 

EC-486, "Idle Speed"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

1. Run engine at idle.

2. Check ignition timing with a timing light.

For procedure, refer to 

EC-480, "Inspection"

.

For specification, refer to 

EC-486, "Ignition Timing"

.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to 

EM-58, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair the timing chain installation. Then GO TO 4.

1

: Timing indicator

PBIB3263E

1

: Timing indicator

PBIB3263E

EC-134

< BASIC INSPECTION >

[MRA8DE]

BASIC INSPECTION

17.

DETECT MALFUNCTIONING PART

Check the following.

• Check camshaft position sensor (PHASE) and circuit. Refer to 

EC-280, "DTC Logic"

.

• Check crankshaft position sensor (POS) and circuit. Refer to 

EC-277, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair or replace. Then GO TO 4

18.

CHECK ECM FUNCTION 

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but

this is a rare case.)

2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to 

SEC-61,

"ECM : Work Procedure"

 for the one with INTELLIGENT KEY SYSTEM, or 

SEC-174, "ECM : Work Proce-

dure"

 for the one without INTELLIGENT KEY SYSTEM.

>> GO TO 4.

ADDITIONAL SERVICE WHEN REPLACING ECM

EC-135

< BASIC INSPECTION >

[MRA8DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ADDITIONAL SERVICE WHEN REPLACING ECM

Description

INFOID:0000000009758399

When replacing ECM, the following procedure must be performed. (For details, refer to 

EC-135, "Work Proce-

dure"

.)

PROGRAMMING OPERATION

NOTE:

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

cedure to perform the programming.

Work Procedure

INFOID:0000000009758400

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