Nissan Altima L32. Instruction — part 1403
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< COMPONENT DIAGNOSIS >
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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.
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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< COMPONENT DIAGNOSIS >
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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
.
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
NO
>> Repair the harness.
With ignition switch in START
S - ground
Battery voltage
ALBIA0501GB
S - 80
Continuity exists
ALBIA0502GB
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< COMPONENT DIAGNOSIS >
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STARTING SYSTEM
STARTING SYSTEM
Wiring Diagram - Coupe
INFOID:0000000004205236
ABBWA0065GB
STARTING SYSTEM
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AWBWA0024G
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