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 digital transmission range (TR) sensor is in PARK or NEUTRAL.
- the anti-theft system is operational.
Refer to SYSTEM WIRING DIAGRAMS - FIVE HUNDRED , SYSTEM WIRING DIAGRAMS - FREESTYLE or SYSTEM WIRING DIAGRAMS - MONTEGO for schematic and connector information.
SPECIAL TOOL(S) 73111 Automotive Meter 105-R0057 or equivalent Worldwide Diagnostic System (WDS) Vehicle Communication Module (VCM) with appropriate adapters, or equivalent diagnostic tool SABRE Electrical System Tester 010-00736 or equivalent
Scheme 1
Principles of Operation
The starting system is electronically controlled by the passive anti-theft system (PATS). The PATS recognizes the correct electronically coded ignition key and signals the instrument cluster to provide a ground for the starter relay. The energized relay provides voltage to the starter solenoid with the key in the START position, thereby allowing the starter motor to activate.
Normal Operation
Under normal operation, voltage is supplied to the ignition switch through circuit 1715 (RD). When the ignition switch is turned to the START position, voltage is sent to the smart junction box (SJB) fuse through circuit 1522 (DG). From the fuse in the SJB, voltage is sent to the starter relay coil through circuit 1785 (LG/VT). Ground for the starter relay coil is provided from the PCM through circuit 329 (PK). Voltage is supplied to the starter relay switch through circuit 1786 (BN/PK). When the relay is energized, voltage is sent to the starter motor through circuit 33 (WH/PK).