just curious..... i was reading in my haynes manual about putting a
jumper from the a &b terminal on the obd1 diagnostic port to get the
trouble codes to flash on the instrument panel... i noticed it said to
not turn the engine over or start the vehicle when the jumper was in
place and am just cutious what would happen in that event.
With GM cars it goes into field diagnostic mode where the Service engine light
flashes according to:
1. Open/Closed loop.
2. When in closed loop, the leaness or richness of the mixture. Fast flashing is
rich, slow is lean.
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