Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003MALIBU V6-3.1L VIN JREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDESCRIPTION AND OPERATION
2003 Chevrolet Malibu V6-3.1L VIN J
Information Bus: Description and Operation
2003 Chevrolet Malibu V6-3.1L VIN JSECTION Description and Operation
DATA LINK COMMUNICATIONS DESCRIPTION AND OPERATION
DATA LINK CONNECTOR (DLC)
The data link connector (DLC) terminal 2 contains the class 2 serial data link.
The DLC also provides a power source for the scan tool as follows:
- Battery voltage at the DLC terminal 16.
- Ground at terminals 4 and 5.
CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate with each other:
- The body control module (BCM)
- The electronic brake control module (EBCM)
- The integrated radio chassis (IRC)
- The powertrain control module (PCM)
- The Remote Control Door Lock Receiver (RCDLR)
- The inflatable restraint sensing and diagnostic module (SDM)
The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes.
DATA LINK CONNECTOR (DLC)
The data link connector (DLC) terminal 2 contains the class 2 serial data link.
The DLC also provides a power source for the scan tool as follows:
- Battery voltage at the DLC terminal 16.
- Ground at terminals 4 and 5.
CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate with each other:
- The body control module (BCM)
- The electronic brake control module (EBCM)
- The integrated radio chassis (IRC)
- The powertrain control module (PCM)
- The Remote Control Door Lock Receiver (RCDLR)
- The inflatable restraint sensing and diagnostic module (SDM)
The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.