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

MFI/Fuel Pump Relay - Bottom View:

1. Remove the relay.

2. Check that there is continuity between (4) and (6) terminals.

Standard value: 35 - 75 ohms

MFI/Fuel Pump Relay Check:

3. Use jumper leads to connect relay terminal No. 6 to the battery (+) terminal and terminal No. 4 to the battery (-) terminal.

Check the continuity between relay terminal No. 2 - 8 while connecting and disconnecting the jumper lead at the battery (-) terminal.

MFI/Fuel Pump Relay Check:

4. If there is a defect, replace the MFI (ASD) relay or fuel pump relay.