chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

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"Service Engine Soon" Light on or Won't Flash Code 12|Page 7332 > < "Service Engine Soon" Light on or Won't Flash Code 12|Page 7330

G 30 Van V8-379 6.2L DSL VIN C FI (1992)

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Malfunction Indicator Lamp: Testing and Inspection
"Service Engine Soon" Light Inoperative

Diagnostic Circuit

Circuit Description:

When the engine is started, the ECM grounds terminal "A10" to turn "OFF" the "Service Engine Soon" light. When ALDL terminal "B" is
grounded it alternately grounds and opens "A10" to flash a code.

"Service Engine Soon" Light on or Won't Flash Code 12|Page 7332 > < "Service Engine Soon" Light on or Won't Flash Code 12|Page 7330