TORQUE SPECIFICATIONS
| Description | Nm |
|---|---|
| Starter motor bolt and stud bolt (2.3L) | 25 |
| Starter motor bolts (3.0L and 3.5L) | 27 |
| Starter motor solenoid battery cable nut | 12 |
| Starter motor solenoid wire nut | 5 |
TORQUE SPECIFICATIONS
The starting system consists of the following components
- Starter motor
- Starter motor relay - part of smart junction box (SJB)
- Transmission range (TR) sensor - automatic transmission
- Clutch cutoff switch - manual transmission
- Battery
- Ignition switch
- PCM
- Start diode
When the key is placed in the START position, the starter solenoid is energized and a magnetic field is created in the starter solenoid windings. The iron plunger core is drawn into the starter solenoid coil, and a drive lever and pin connected to the starter drive engages the drive pinion gear to the flexplate/flywheel ring gear. When the plunger is pulled all the way in, its contact disc closes the circuit between the battery and the starter motor solenoid feed terminals. This sends current to the motor, and the drive pinion gear cranks the flexplate/flywheel to start the engine. When current flows to the starter motor, the starter solenoid pull-in coil is bypassed and the hold-in coil keeps the drive pinion gear engaged with the flywheel until the ignition switch is released from the START position.
An overrunning clutch in the starter drive protects the starter motor from excessive speeds during the brief period before the driver releases the ignition switch from the START position as the engine starts.
Vehicles equipped with a manual transaxle have a clutch cutoff switch mounted on the clutch pedal bracket. The clutch cutoff switch prevents operation of the starter motor unless the clutch is fully depressed.
Vehicles equipped with an automatic transmission have a TR sensor mounted on the transaxle. The TR sensor prevents operation of the starter motor unless NEUTRAL or PARK is selected. The vehicle has one-touch integrated start (OTIS), a computer-assisted cranking system. This feature assists in starting the engine. If the ignition key is turned to the START position and released when the engine begins cranking, the engine may continue cranking for up to 10 seconds or until the vehicle starts.
One-Touch Integrated Start (OTIS)
Once the ignition is turned to the START position and the vehicle is in NEUTRAL or PARK, the PCM reads starter motor request (SMR) from the ignition switch and gains control of the starter engagement. The customer is no longer in the loop after the initial crank request, the customer may release the key to the RUN/START position. The PCM will disengage the starter motor based on the following events
- The engine is started (RPM threshold)
- A set time has been exceeded (calibrated)
- The ignition key has been turned to the OFF position
Special Tools Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
Scheme 1
The starting system is electronically controlled by the passive anti-theft system (PATS). PATS is controlled by the instrument cluster. PATS recognizes the correct electronically coded ignition key and the instrument cluster will send a message to the PCM to provide a ground for the starter relay. The energized relay provides voltage to the starter solenoid, thereby allowing the starter motor to activate.
See also:
• JACKING AND LIFTING