mazda Workshop Repair Guides

Mazda Workshop Service and Repair Manuals

Main Relay (Computer/Fuel System) > < Fuel Pump Relay|Locations|Page 3389
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Fuel Pump Relay: Testing and Inspection

RELAY CIRCUIT

Circuit Opening Relay

1.  

Remove the circuit opening relay.

2.  

Check the circuit opening relay as outlined below.

    TERMINAL    CHECKING ITEM        

CORRECT RESULT

    

Fp        Resistance        

0.2-30 Ohms

    

Fc        Continuity (Cranking)    

Infinity

    

B        Voltage (Ign. on)    

Battery Voltage

    

STA        Voltage (Cranking)    

Approx. 9 volts

    

E1        Continuity        

Infinity

CIRCUIT OPENING RELAY

1.  

Apply 12 volts and a ground to the terminals below and check the circuit opening relay as described.

    12 VOLTS    

GROUNDED     CORRECT RESULT

    

STA        

E1        

B-Fp: Continuity

    

B        

Fc        

Fp: Battery Voltage

RESISTANCE

Relay Terminal Identification

1.  

Check the resistance between the terminals with an ohmmeter.

   BETWEEN TERMINALS         RESISTANCE

      STA -- E1            

15-30 Ohms

       B -- Fc            

80-150 Ohms

       B -- Fp            

 Infinity

Main Relay (Computer/Fuel System) > < Fuel Pump Relay|Locations|Page 3389