Used in some models produced after 1990



TE1 Engine self-diagnostic codes
E1 Engine self-diagnostic codes. E1 is the common ground for the Ecu's self diagnosis when attached, will access trouble codes on OBD1 toyota cars
W Engine self-diagnostic codes. W is aself diagnosis for the warning light circuit inside the vehicle gray cover underhood connecter by using a jumper wire to check weather the warning and the check engine lamp and wiring circuit are okay for proper functioning which means a self check for the complete warning circuit integrity for this OBD1
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17 pin Toyota proprietary of Toyota 17 pin old diagnostic connector connector layout
17 pin Toyota proprietary connector
at the Toyota car