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Home >> Geo >> 1996 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> Circuit Test B2-4 - No Communication From Data Link Connector >> Condition

Circuit Test B2-4 - No Communication From Data Link Connector: Condition

Some scan tools require an external power feed. Ensure correct power feed is being used. Try scan tool on another vehicle to ensure scan tool and/or communication cables are not at fault.

NOTE: Start with step 2) if scan tool uses an external power supply.