Three things to start with:

1) The temperature sensor should be a two pole type, unless the car was originally a California car, in which case the sensor is a four pole type. Proceeding as with a two pole type, each of the pins should show a resistance to ground of between 250 - 5000 ohms, depending on temperature.

2) With the throttle closed, pin #1 on the connector to the throttle valve switch should show 0 ohms resistance to ground.

3) Check the Overvoltage Protection relay (OVP) for a blown fuse. The OVP usually has a red top with a clear cover; fuse under cover.