Nissan Sentra. Manual - part 840

STR-28

< DTC/CIRCUIT DIAGNOSIS >

S CONNECTOR CIRCUIT

S CONNECTOR CIRCUIT

Description

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The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START posi-

tion while the selector lever is in the P (Park) or N (Neutral) position (CVT Models) or the clutch pedal is

depressed (M/T Models).

Diagnosis Procedure

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Regarding Wiring Diagram information, refer to 

STR-10, "Wiring Diagram"

 (with Intellignet Key system) or

STR-15, "Wiring Diagram"

 (without Intelligent Key system).

CAUTION:

Perform diagnosis under the condition that engine cannot start by the following procedure.

1. Remove fuel pump fuse.

2. Crank or start the engine (where possible) until the fuel pressure is released.

1.

CHECK “S” CONNECTOR CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect starter motor connector.

3. Shift selector lever to “P” (Park) or “N” (Neutral) position (CVT Models) or the clutch pedal is depressed

(M/T Models).

4. Check voltage between starter motor harness connector F28 and ground.

Is the inspection result normal?

YES

>> “S” circuit is OK. Further inspection is necessary. Refer to 

STR-20, "Work Flow (With GR8-1200

NI)"

 or 

STR-24, "Work Flow (Without GR8-1200 NI)"

.

NO

>> GO TO 2.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 

1. Disconnect IPDM E/R connector.

2. Check continuity between starter motor harness connector F28 and the IPDM E/R harness connector

E44.

Is the inspection result normal?

YES

>> Further inspection is necessary. Refer to 

STR-20, "Work Flow (With GR8-1200 NI)"

 or 

STR-24,

"Work Flow (Without GR8-1200 NI)"

.

NO

>> Repair or replace the harness or connectors.

(+)

(-)

Condition 

Voltage 

(Approx.)

Connector Terminal 

F28

ST

Ground 

When the ignition switch is in START position

Battery voltage

Starter motor harness connector 

IPDM E/R harness connector

Continuity 

Connector

Terminal

Connector

Terminal

F28

ST

E44

19

Yes

STARTING SYSTEM

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< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

STARTING SYSTEM

Symptom Table

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Symptom

Reference

No normal cranking

Refer to 

STR-20, "Work Flow (With GR8-1200 NI)"

 or 

STR-24, 

"Work Flow (Without GR8-1200 NI)"

.

Starter motor does not rotate

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< REMOVAL AND INSTALLATION >

STARTER MOTOR

REMOVAL AND INSTALLATION

STARTER MOTOR

Exploded View

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Removal and Installation

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NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing. 

REMOVAL

1. Disconnect the battery negative terminal. Refer to 

PG-50, "Removal and Installation (Battery)"

.

2. Remove fan shroud and motor assembly. Refer to 

CO-17, "Component"

.

3. Remove reservoir hose upper from radiator to water outlet. Refer to 

CO-15, "Exploded View"

. 

4. Remove “B” terminal nut and “B” terminal harness.
5. Remove “S” terminal nut and “S” terminal harness.
6. Disconnect harness connector from oil temperature sensor. Refer to 

EM-94, "Exploded View"

.

7. Disconnect harness connector (1) from crankshaft position sen-

sor.

8. Remove harness clip (A) from oil pan (upper), and then remove

harness (2) and set aside.

9. Remove upper starter motor bolt.
10. Remove lower starter motor bolt and remove starter motor.

INSTALLATION

1.

“S” terminal harness

2.

“B” terminal harness

3.

Starter motor

4.

Cylinder block

  Front

PKIC8095E

JMBIA3021ZZ

STARTER MOTOR

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< REMOVAL AND INSTALLATION >

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• Installation is in the reverse order of removal.

• Refill engine coolant. Refer to 

CO-12, "Changing Engine Coolant"

.

CAUTION:

• Be careful to tighten "B" terminal nut to the specified torque.