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).
Refer to STARTING/CHARGING for schematic and connector information.
SPECIAL TOOL(S) 73 Digital Multimeter 105-R0051 or equivalent SABRE Premium Battery and Electrical System Tester 010-00730 or equivalent Worldwide Diagnostic System (WDS) Vehicle Communication Module (VCM) with appropriate adapters, or equivalent diagnostic tool
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
In normal operation, voltage from the bussed electrical center (BEC) is supplied to the ignition switch through circuit 1050 (LG/PK). When the ignition switch is placed in the START position, voltage is supplied through circuit 1522 (DG) to the smart junction box (SJB).
For automatic transmission equipped vehicles, voltage is supplied from the SJB to the digital transmission range (TR) sensor through circuit 32 (RD/LB). In PARK or NEUTRAL, voltage is supplied from the TR sensor through circuit 33 (WH/PK) to the starter relay coil located in the BEC. The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
For manual transmission equipped vehicles, voltage from the SJB is supplied to the clutch pedal position switch (CPP) through circuit 32 (RD/LB). When the clutch pedal is depressed, voltage is supplied from the CPP to the starter relay coil located in the BEC through circuit 32 (RD/LB). The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
When the starter relay is energized, voltage supplied to the relay switch is sent to the starter motor solenoid through circuit 113 (YE/LB). Battery voltage is supplied to the starter motor through circuit 2037 (RD) at all times.
In normal operation, voltage from the bussed electrical center (BEC) is supplied to the ignition switch through circuit 1050 (LG/PK). When the ignition switch is placed in the START position, voltage is supplied through circuit 1522 (DG) to the smart junction box (SJB).
For automatic transmission equipped vehicles, voltage is supplied from the SJB to the digital transmission range (TR) sensor through circuit 32 (RD/LB). In PARK or NEUTRAL, voltage is supplied from the TR sensor through circuit 33 (WH/PK) to the starter relay coil located in the BEC. The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
For manual transmission equipped vehicles, voltage from the SJB is supplied to the clutch pedal position switch (CPP) through circuit 32 (RD/LB). When the clutch pedal is depressed, voltage is supplied from the CPP to the starter relay coil located in the BEC through circuit 32 (RD/LB). The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
When the starter relay is energized, voltage supplied to the relay switch is sent to the starter motor solenoid through circuit 113 (YE/LB). Battery voltage is supplied to the starter motor through circuit 2037 (RD) at all times.
In normal operation, voltage from the bussed electrical center (BEC) is supplied to the ignition switch through circuit 1050 (LG/PK). When the ignition switch is placed in the START position, voltage is supplied through circuit 1522 (DG) to the smart junction box (SJB).
For automatic transmission equipped vehicles, voltage is supplied from the SJB to the digital transmission range (TR) sensor through circuit 32 (RD/LB). In PARK or NEUTRAL, voltage is supplied from the TR sensor through circuit 33 (WH/PK) to the starter relay coil located in the BEC. The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
For manual transmission equipped vehicles, voltage from the SJB is supplied to the clutch pedal position switch (CPP) through circuit 32 (RD/LB). When the clutch pedal is depressed, voltage is supplied from the CPP to the starter relay coil located in the BEC through circuit 32 (RD/LB). The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
When the starter relay is energized, voltage supplied to the relay switch is sent to the starter motor solenoid through circuit 113 (YE/LB). Battery voltage is supplied to the starter motor through circuit 2037 (RD) at all times.
In normal operation, voltage from the bussed electrical center (BEC) is supplied to the ignition switch through circuit 1050 (LG/PK). When the ignition switch is placed in the START position, voltage is supplied through circuit 1522 (DG) to the smart junction box (SJB).
For automatic transmission equipped vehicles, voltage is supplied from the SJB to the digital transmission range (TR) sensor through circuit 32 (RD/LB). In PARK or NEUTRAL, voltage is supplied from the TR sensor through circuit 33 (WH/PK) to the starter relay coil located in the BEC. The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
For manual transmission equipped vehicles, voltage from the SJB is supplied to the clutch pedal position switch (CPP) through circuit 32 (RD/LB). When the clutch pedal is depressed, voltage is supplied from the CPP to the starter relay coil located in the BEC through circuit 32 (RD/LB). The starter relay coil is supplied ground from the PCM through circuit 1419 (LG/YE).
When the starter relay is energized, voltage supplied to the relay switch is sent to the starter motor solenoid through circuit 113 (YE/LB). Battery voltage is supplied to the starter motor through circuit 2037 (RD) at all times.