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 MANUALSSATURN1992SL L4-1.9L SOHC VIN 9REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDATA LINK CONNECTORDESCRIPTION AND OPERATIONSERIAL DATA
1992 Saturn SL L4-1.9L SOHC VIN 9
Serial Data
1992 Saturn SL L4-1.9L SOHC VIN 9SECTION Serial Data
PCM Wiring:
PURPOSE
Serial Data is a single wire line that the Powertrain Control Module (PCM) uses to communicate and share information with other systems.
OPERATION
A Serial Data line is part of the ALDL connector and is used for hookup of test equipment.
On vehicles equipped with an automatic transaxle the Powertrain Control Module (PCM) will have an internal serial data line. This line will allow the Engine Controller (EC) to send and receive signals from the Transaxle Controller (TC) and Antilock Brake System (ABS). The EC will control this serial data line within the PCM.
NOTE: The Engine Controller (EC) and Transaxle Controller (TC) are located within the Powertrain Control Module (PCM).
RENDER: 1.0x
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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.