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Pontiac
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1990
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J2000/Sunbird L4-121 2.0L
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Output Driver
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Service and Repair
Output Driver: Service and Repair
Quad/
Output drivers
are hard wired onto the ECM/PCM/
VCM
, and can't be serviced separately.