Nissan Titan. Instruction — part 576
STR-8
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow (Without GR8-1200 NI)
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OVERALL SEQUENCE
DETAILED FLOW
NOTE:
If any malfunction is found, immediately disconnect the battery cable from the negative terminal.
1.
CHECK ENGINE START
Crank the engine and check that the engine starts.
Does the engine start?
YES
>> GO TO 2.
NO
>> GO TO 3.
AWBIA1303GB
DIAGNOSIS AND REPAIR WORKFLOW
STR-9
< BASIC INSPECTION >
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2.
CHECK THAT THE STARTER MOTOR STOPS
Check that the starter motor stops after starting the engine.
Does the starter motor stop?
YES
>> Inspection End.
NO
>> Replace starter motor. Refer to
STR-19, "Removal and Installation"
3.
CHECK THAT THE ENGINE TURNS WHEN CRANKING
Check that the engine turns when cranking.
Does engine turn when cranking?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
CHECK THE ENGINE SPEED WHEN CRANKING
Check that the engine speed is not low when cranking.
Does engine turn normally?
YES
>> Check ignition/fuel system.
NO
>> Check charge condition, corrosion and connection condition of the battery. Refer to
5.
CHECK STARTER MOTOR ACTIVATION
Check that the starter motor runs at cranking.
Does starter motor turn?
YES
>> Replace starter motor. Refer to
STR-19, "Removal and Installation"
NO
>> GO TO 6.
6.
CHECK POWER SUPPLY CIRCUIT
Check the following conditions:
• Fuse and fusible link
• Charge condition, corrosion and connection of the battery.
Are these inspection results normal?
YES
>> GO TO 7.
NO
>> Repair as needed.
7.
CHECK STARTING SYSTEM WIRING
Check the following:
• “B” terminal circuit. Refer to
.
• “S” terminal circuit. Refer to
.
Are the inspection results normal?
YES
>> Replace starter motor. Refer to
STR-19, "Removal and Installation"
NO
>> Repair as needed.
STR-10
< SYSTEM DESCRIPTION >
STARTING SYSTEM
SYSTEM DESCRIPTION
STARTING SYSTEM
System Diagram
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System Description
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The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The
starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.
Component Parts Location
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ALBIA0416GB
1.
A/T assembly
F9 (floor shift)
F17 (column shift)
2.
IPDM E/R E119, E120, E122, E124
3.
BCM M18 (view with instrument panel
lower LH panel removed)
AWBIA0127ZZ
STARTING SYSTEM
STR-11
< SYSTEM DESCRIPTION >
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Component Description
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Component part
Description
TCM
TCM supplies power to the starter relay inside the IPDM E/R when
the selector lever is shifted to the P or N position.
BCM
BCM sends a starter request signal to the CPU of the IPDM E/R
over the CAN communication lines.
IPDM E/R
CPU inside IPDM E/R operates the starter relay at the request of
the BCM over the CAN communication lines.
Starter motor
The starter motor plunger closes and the motor is supplied with
battery power, which in turn cranks the engine, when the “S” ter-
minal is supplied with electric power.
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