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

MFI RELAY (ASD RELAY) AND FUEL PUMP RELAY CHECK

1. Remove the relay.
2. Check that there is continuity between (4) and (6) terminals.
- Standard value: 35 - 75 ohms

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.


Jumper lead Continuity between terminals No. 2 - 8
Connected Continuity (0 ohms)
Disconnected No continuity (infinite ohms)


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