Grand Cherokee 4WD V6-3.7L (2009)
![background image](/jeep/grand_cherokee_4wd/v6-3.7l/Page-188005.png)
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Ignition coil(s)
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Certain relays/solenoids
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Certain sensors
Sensor Return
SENSOR RETURN
The Sensor Return circuits are internal to the Powertrain Control Module (PCM).
Sensor Return provides a low-noise ground reference for all engine control system sensors. For more information, See: .
Signal Ground
SIGNAL GROUND
Signal ground provides a low noise ground to the data link connector.