Used in some models produced after 1990
| Pin |
Description (may be empty) |
| TE1 | Engine self-diagnostic codes |
| E1 | Engine self-diagnostic codes. E1 is the common ground for the Ecu's self diagnosis when atec wants to 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 the gamper wire to check weather the warning and the check engine lamp and wiring circuit are okay for proper functioning which meanes aself chek for the complete warning circuit integrity for this obd 1 |
correct
incorrect