Main Relay (Computer/Fuel System): Testing and Inspection

Main, Fuel Pump, Starting Motor Control and Throttle Actuator Control Relays (Single Type Relay)

1. Disconnect negative cable at battery.
2. Remove main relay (1), fuel pump relay (3), starting motor control relay (2), throttle actuator control relay (4) from fuse box No.2 (5) and/or relay box (6).
3. Check that there is no continuity between terminal "C" and "D". If there is continuity, replace relay.




4. Connect battery positive (+) terminal to terminal "B" of relay. Connect battery negative (-) terminal to terminal "A" of relay. Check for continuity between terminal "C" and "D". If there is no continuity when relay is connected to the battery, replace defective relay.