Control Circuit Test

The starter control circuit has:

Starter motor with integral solenoid
Starter relay
Transmission range sensor, or Park/Neutral Position switch with automatic transmissions
Ignition switch
Battery
All related wiring and connections
Powertrain Control Module (PCM)

CAUTION: Before performing any starter tests, the ignition and fuel systems must be disabled.

To disable ignition and fuel systems, disconnect the Automatic Shutdown Relay (ASD). The ASD relay is located in the Power Distribution Center (PDC). Refer to the PDC cover for the proper relay location.