STARTING SYSTEMS
CONTENTS
page page
GENERAL INFORMATION
GENERAL INFORMATION ...................1
DESCRIPTION AND OPERATION
BOSCH AND MELCO STARTERS .............1
NIPPONDENSO STARTER...................1
SUPPLY CIRCUIT AND CONTROL CIRCUIT.....1
DIAGNOSIS AND TESTING
CONTROL CIRCUIT TEST...................2
FEED CIRCUIT RESISTANCE TEST............3
FEED CIRCUIT TEST.......................3
STARTING SYSTEM TEST ..................4
REMOVAL AND INSTALLATION
SAFETY SWITCHES .......................6
STARTER ...............................6
STARTER RELAY .........................8
SPECIFICATIONS
STARTER ...............................8
TORQUE ................................8
GENERAL INFORMATION
GENERAL INFORMATION
The starting system (Fig. 1) and (Fig. 2) has:
• Ignition switch
• Starter relay
• Transmission range sensor, or Park/Neutral
Position switch with automatic transmissions
• Clutch Pedal Position Switch with manual
transmissions
• Powertrain Control Module (PCM)
• Wiring harness
• Battery
• Starter motor with an integral solenoid
These components form two separate circuits. A
high amperage circuit that feeds the starter motor up
to 300+ amps, and a control circuit that operates on
less than 20 amps.
The Powertrain Control Module (PCM) controls a
double start over ride safety that does not allow the
starter to be engaged if the engine is already running.
DESCRIPTION AND OPERATION
BOSCH AND MELCO STARTERS
The Bosch and Melco are permanent magnet
starter motors. A planetary gear train transmits
power between starter motor and pinion shaft. The
fields have six permanent magnets. The Bosch is
used on 2.0L engines and Melco is used on 2.5L
engines.
NIPPONDENSO STARTER
The Nippondenso is a reduction gear-field coil
starter motor and is available on 2.4L engine.
SUPPLY CIRCUIT AND CONTROL CIRCUIT
The starter system consists of two separate cir-
cuits:
• A high amperage supply to feed the starter
motor.
• A low amperage circuit to control the starter
solenoid.
Fig. 1 Starting System Components - Automatic
Fig. 2 Starting System Components - Manual
JA STARTING SYSTEMS 8B - 1
1999 JA Cirrus, Stratus and Breeze
Publication No. 81-270-9121
TSB 26-09-98 September, 1998
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