GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Normal engine cranking speed rpm | 100-140 rpm |
| Starter motor no load current draw amperes | 60-80 amps |
| Starter motor normal load current draw | 130 amps |
| Starter motor maximum load current draw amperes | 400 amps |
| Maximum starting circuit voltage drop (engine at normal engine temperature) | 0.5 volt |
GENERAL SPECIFICATIONS
TORQUE SPECIFICATIONS
| Description | Nm |
|---|---|
| Starter motor bolts | 25 |
| Starter motor solenoid S-terminal nut (W705790-S901) | 5 |
| Starter motor solenoid B+ terminal nut | 12 |
TORQUE SPECIFICATIONS
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 engage the starter drive and pass 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.
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 bussed electrical center (BEC) to the starter solenoid.
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.
See also:
• AUTOMATIC TRANSAXLE/TRANSMISSION
• COMPONENT TESTING