Fuel Pump Relay: Testing and Inspection

COMPONENTS

INSPECTION

1. REMOVE CIRCUIT OPENING RELAY

2. INSPECT CIRCUIT OPENING RELAY CONTINUITY

DENSO made:




1. Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
2. Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.

BOSCH made:




1. Using an ohmmeter, check that there is continuity between terminals 85 and 86.
If there is no continuity, replace the relay.
2. Check that there is no continuity between terminals 30 and 87.
If there is continuity, replace the relay.

3. INSPECT CIRCUIT OPENING RELAY OPERATION

DENSO made:
1. Apply battery positive voltage across terminals 1 and 2.




2. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.

BOSCH made:
1. Apply battery positive voltage across terminals 85 and 86.




2. Using an ohmmeter, check that there is continuity between terminals 30 and 87.
If there is no continuity, replace the relay.

4. REINSTALL CIRCUIT OPENING RELAY