Infiniti G37 Coupe. Manual — part 1284
B TERMINAL CIRCUIT
STR-7
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000001665981
The “B” terminal is constantly supplied with battery power.
Diagnosis Procedure
INFOID:0000000001665982
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 “B” TERMINAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Check that starter motor “B” terminal connection is clean and tight.
3.
Check voltage between starter motor “B” terminal and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Check harness between battery and starter motor for open circuit.
2.
CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
1.
Shift A/T selector lever to “P” or “N” position. (A/T models)
Keep depressing clutch pedal fully. (M/T models)
2.
Check voltage between battery positive terminal and starter motor “B” terminal.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check harness between the battery and the starter motor for poor continuity.
3.
CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1.
Shift A/T selector lever to “P” or “N” position. (A/T models)
Keep depressing clutch pedal fully. (M/T models)
2.
Check voltage between starter motor case and battery negative terminal.
Is the inspection result normal?
YES
>> “B” terminal circuit is OK. Further inspection is necessary. Refer to
.
NO
>> Check the starter motor case and ground for poor continuity.
Terminals
Voltage (Approx.)
(+)
(–)
Starter motor “B” terminal
Terminal
E204
2 Ground
Battery
voltage
Terminals
Condition
Voltage (Approx.)
(+)
(–)
Starter motor
“B” terminal
Terminal
Battery positive terminal
E204
2
When the ignition switch is
in START position
Less than
0.5 V
Terminals
Condition
Voltage (Approx.)
(+)
(–)
Starter motor case
Battery negative terminal
When the ignition switch is in
START position
Less than 0.2 V
STR-8
< COMPONENT DIAGNOSIS >
S CONNECTOR CIRCUIT
S CONNECTOR CIRCUIT
Description
INFOID:0000000001665983
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 for A/T models or the clutch pedal is depressed for M/T
models.
Diagnosis Procedure
INFOID:0000000001665984
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 A/T selector lever to “P” or “N” position. (A/T models)
Keep depressing clutch pedal fully. (M/T models)
4.
Check voltage between starter motor harness connector and ground.
Is the inspection result normal?
YES
>> “S” connector circuit is OK. Further inspection is necessary. Refer to
NO
>> GO TO 2.
2.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Check the following terminals and connectors for damage, bend and loose connection.
-
Harness connector F1
-
Harness connector E3
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the terminal and connector.
3.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1.
Disconnect IPDM E/R connector.
2.
Check continuity between starter motor harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> Further inspection is necessary. Refer to
in SEC section.
NO
>> Repair the harness.
Terminals
Condition
Voltage (Approx.)
(+)
(–)
Starter motor har-
ness connector
Terminal
F52
1 Ground
When the ignition switch is in
START position
Battery voltage
Starter motor harness connector
IPDM E/R harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
F52
1
E7
80
Existed
STARTING SYSTEM
STR-9
< COMPONENT DIAGNOSIS >
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STARTING SYSTEM
Wiring Diagram - STARTING SYSTEM -
INFOID:0000000001665985
JCBWA0368GB
STR-10
< COMPONENT DIAGNOSIS >
STARTING SYSTEM
JCBWA0369GB
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