Nissan Altima L32. Manual - part 1403

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B TERMINAL CIRCUIT

COMPONENT DIAGNOSIS

B TERMINAL CIRCUIT

Description

INFOID:0000000004205232

The “B” terminal is constantly supplied with battery power.

Diagnosis Procedure

INFOID:0000000004205233

CAUTION:

Perform diagnosis under the condition that the 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 depleted.

1.

CHECK TERMINAL B POWER SUPPLY VOLTAGE

1. Turn ignition switch OFF.

2. Make sure that starter motor connector F27 terminal B connection is clean and tight.

3. Check voltage between starter motor connector F27 terminal B

and ground.

Is there battery voltage present?

YES

>> GO TO 2

NO

>> Check harness between battery and starter motor for

open circuit.

2.

CHECK BATTERY CABLE (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position. (CVT models)

Press and hold the clutch pedal fully with the control lever in neutral. (M/T models)

2. Check voltage between battery positive terminal and starter

motor connector F27 terminal B while cranking the engine.

Is the voltage drop less than 0.5V?

YES

>> GO TO 3

NO

>> Check harness between the battery and the starter

motor for high resistance.

3.

CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)

1. Shift CVT selector lever to “P” or “N” position. (CVT models)

Press and hold the clutch pedal fully with the control lever in neutral. (M/T models)

2. Check voltage between starter motor case and battery negative

terminal while cranking the engine.

Is the voltage drop less than 0.2V?

YES

>> Terminal B circuit is OK. Further inspection necessary.

Refer to 

STR-3, "Work Flow"

.

NO

>> Check the starter motor case to engine mounting for

high resistance.

B - ground

Battery voltage

WKIA0137E

While cranking the engine

Terminal B - B+ terminal

Less than 0.5V

WKIA0138E

While cranking the engine

Starter case - B- terminal

Less than 0.2V

WKIA0139E

S CONNECTOR CIRCUIT

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S CONNECTOR CIRCUIT

Description

INFOID:0000000004205234

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 or N position (CVT models) or the clutch pedal is fully depressed (M/T

models).

Diagnosis Procedure

INFOID:0000000004205235

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 F28.

3. Shift CVT selector lever to “P” or “N” position. (CVT models)

Press and hold the clutch pedal fully with the control lever in

neutral. (M/T models)

4. Check voltage between starter motor harness connector F28

terminal S and ground with the ignition in START.

Is battery voltage present?

YES

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

STR-3, "Work Flow"

.

NO

>> GO TO 2

2.

CHECK CONNECTOR

1. Turn ignition switch OFF.

2. Check the following terminals and connectors for damage, bent pins and loose connections.

-

IPDM E/R harness connector F10

-

Starter motor harness connector F28

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair the terminal and connector.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the following harness connectors.

-

IPDM E/R connector F10

-

Starter motor connector F28

2. Check continuity between starter motor harness connector F28

terminal S and IPDM E/R harness connector F10 terminal 80.

Is there proper continuity between the two pins?

YES

>> Further inspection necessary. Refer to 

STR-3, "Work

Flow"

.

NO

>> Repair the harness.

With ignition switch in START

S - ground

Battery voltage

ALBIA0501GB

S - 80

Continuity exists

ALBIA0502GB

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STARTING SYSTEM

STARTING SYSTEM

Wiring Diagram - Coupe

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ABBWA0065GB

STARTING SYSTEM

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AWBWA0024G