Principles Of Operation

Starting System

Principles of Operation

Starting System

This vehicle is equipped with a One-Touch Integrated Start (OTIS) starting system. The starting system is electronically controlled by the PCM. The PCM receives the following inputs:

- Brake pedal pressed, from the Brake Pedal Position (BPP) switch, all vehicles
- Transmission in PARK or NEUTRAL, from the transmission mechatronics unit
- Correctly coded ignition key, from the Passive Anti-Theft System (PATS), vehicles equipped with PATS
- Starter motor request, ignition switch in the START position

When the ignition switch is placed in the START position, voltage is supplied to the coil of the starter relay through the OTIS diode. A starter motor request signal is also sent to the PCM. If the PCM recognizes the needed input signals, it provides the starter relay coil with both voltage and a ground. The starter relay contacts close providing voltage to the starter solenoid, allowing the starter motor to activate. Once the starter motor begins to crank, the ignition switch may be released. The starter motor will continue to crank until the engine starts, a PCM controlled crank time has been exceeded or the ignition switch is turned to the OFF position.