Nissan Sentra. Manual - part 438

EC-448

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

BRAKE PEDAL POSITION SWITCH

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace brake pedal position switch. Refer to 

BR-22, "Exploded View"

.

Brake pedal position switch

Condition

Continuity

+

−

Terminals

1

2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

ASCD INDICATOR

EC-449

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

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ASCD INDICATOR

Component Function Check

INFOID:0000000009758706

1.

CHECK ASCD INDICATOR FUNCTION

Check ASCD indicator under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-449, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009758707

1.

CHECK DTC

Check that DTC UXXXX is not displayed.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX.

2.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter. Refer to 

MWI-26, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-77, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

ASCD INDICATOR

CONDITION

SPECIFICATION

CRUISE LAMP

• Ignition switch: ON

• MAIN switch: Pressed at the 1st time 

→

at the 2nd time

ON 

→ OFF

SET LAMP

• MAIN switch: ON
• When vehicle speed is between 38 km/h 

(24 MPH) and 160 km/h (100 MPH)

• ASCD: Operating

ON

• ASCD: Not operating

OFF

EC-450

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

FUEL INJECTOR

FUEL INJECTOR

Component Function Check

INFOID:0000000009758708

1.

INSPECTION START

Turn ignition switch to START.
Is any cylinder ignited?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-450, "Diagnosis Procedure"

.

2.

CHECK FUEL INJECTOR FUNCTION

With CONSULT

1. Start engine.

2. Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

3. Check that each circuit produces a momentary engine speed drop.

Without CONSULT

1. Let engine idle.

2. Listen to each fuel injector operating sound.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-450, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009758709

1.

CHECK FUSE

1. Turn ignition switch OFF.

2. Pull out #52 fuse and check that the fuse is not fusing.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the fuse after repairing the applicable circuit.

2.

CHECK FUEL INJECTOR POWER SUPPLY

1. Insert the fuse which pulled out.

2. Disconnect fuel injector harness connector.

3. Turn ignition switch ON.

4. Check the voltage between fuel injector harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

Clicking noise should be heard.

PBIB3332E

+

−

Voltage

Fuel injector

Cylinder

Connector

Terminal

1

F18

1

Ground

Battery voltage

2

F19

1

3

F20

1

4

F21

1

FUEL INJECTOR

EC-451

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

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3.

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between fuel injector harness connector and IPDM E/R harness connector.

4. Also check harness for short to ground.
Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

. 

NO

>> Repair or replace error-detected parts.

4.

CHECK FUEL INJECTOR CONTROL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between fuel injector harness connector and ECM harness connector.

4. Also check harness for short to ground and to power.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK FUEL INJECTOR

Check the fuel injector. Refer to 

EC-451, "Component Inspection (Fuel Injector)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

NO

>> Replace malfunctioning fuel injector. Refer to 

EM-40, "Removal and Installation"

.

Component Inspection (Fuel Injector)

INFOID:0000000009758710

1.

CHECK FUEL INJECTOR

1. Turn ignition switch OFF.

2. Disconnect fuel injector harness connector.

3. Check resistance between fuel injector terminals as per the following.

+

−

Continuity

Fuel injector

IPDM E/R

Cylinder

Connector

Terminal

Connector

Terminal

1

F18

1

E43

18

Existed

2

F19

1

3

F20

1

4

F21

1

+

−

Continuity

Fuel injector

ECM

Cylinder

Connector

Terminal

Connector

Terminal

1

F18

2

F24

13

Existed

2

F19

2

14

3

F20

2

10

4

F21

2

9