Ford Mustang Service Manual: Starter Drive and Flywheel Ring Gear Inspection
Starting System (Description and Operation)
Starter Motor
The starter motor is a 12-volt unit that has the starter solenoid mounted on the drive end housing and functions as follows:
- The current flows through the solenoid energizing coil until the solenoid plunger is at the end of its travel.
- The plunger closes a set of contacts that bypass the energizing coil, letting the holding coil keep the starter drive engaged and passing starting current to the starter motor.
- The motor is energized when the starter solenoid contacts are closed.
- The starter drive engages the flywheel ring gear and starts the engine.
- An overrunning clutch in the starter drive protects the starter motor from excessive speed when the engine starts.
Starter Relay
The starter interrupt relay consists of:
- pull in coil and contacts
- When the ignition switch is in the START position:
- the pull-in coil is activated and pulls the contacts together.
- current passes through the starter relay from the engine compartment power distribution box to the starter solenoid.
Clutch Pedal Position (CPP) Switch
The CPP switch for:
- a manual transmission closes when the clutch pedal is depressed, completing the starting circuit.
- an automatic transmission is a jumper inserted in place of the CPP switch to complete the circuit.
Starter System - Operation
When the ignition switch is turned to the START position the starter relay switches power to the starter solenoid causing the starter motor to engage as long as:
- the clutch pedal is depressed (manual transmission only).
- the digital transmission range (TR) sensor is in PARK or NEUTRAL (automatic transmission only).
Component Tests
Inspection and Verification
WARNING: When servicing starter motor or carrying out other underhood
work in the
vicinity of the starter motor, be aware that the heavy gauge battery input lead
at the s ...
Relay Switch
Starting System (Description and Operation)
Starter Motor
The starter motor is a 12-volt unit that has the starter solenoid mounted on
the drive end housing and
functions as follows:
The current fl ...
Other materials:
Crankshaft Main Bearing Journal - Clearance
Engine (Diagnosis and Testing)
Special Tool(s)
Commercially Available
Leakdown Tester
Quick Disconnect Compression
Tester
134-R0212 or equivalent
Dial Indicator Gauge Adapter
303-007 (TOOL-6565-AB) or
equivalent
Di ...
Switch - Deactivator
Speed Control (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 31 , Speed Control for schematic and connector
information.
Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-F224,
New Generation STAR (NGS)
Tester
418-F052, or equi ...
Unique Calibration
Vehicle Identification Number (VIN) Locator
The vehicle identification number (VIN) is a seventeen-digit alphanumeric
code. The VIN is stamped
on a metal tab riveted to the instrument panel, top upper left of the dash. The
VIN number is also found
on the v ...