Toyota Cressida and Van 1983-1990

Circuit Opening Relay

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REMOVAL & INSTALLATION



Locate the relay in the fuse block. Pull the relay out of the fuse block, test and replace if necessary.

TESTING



Cressida


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Fig. Fig. 1 Measure the resistance of the terminals on the circuit opening relay-Cressida

  1. Remove the left kick panel. This relay is located next to the number 1 junction block.
  2.  
  3. Using a voltmeter, check the voltmeter indicates voltage at the Fp terminal during engine cranking and running. Turn the engine OFF.
  4.  
  5. Disconnect the wiring.
  6.  
  7. Using a ohmmeter, measure the resistance between the terminal.
  8.  
  9. The resistance should be as follows:

    Between terminals STA and E1: 17-25 omega
     
    Between terminals +B and Fc: 88-112 omega
     
    Between terminals +B and Fp: infinity ( f )
     

  10.  
  11. If resistance is not as specified, replace the relay.
  12.  

Van


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Fig. Fig. 2 Circuit opening relay wiring schematic-Van



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Fig. Fig. 3 Checking for continuity of the circuit opening relay-Van

  1. Disconnect the wiring.
  2.  
  3. Using an ohmmeter, check the continuity between the terminals.
  4.  
  5. The continuity should be as follows:

    Between terminals STA and E1: continuity
     
    Between terminals B and Fc: continuity
     
    Between terminals B and Fp: no continuity.
     

  6.  
  7. If continuity is not as specified, replace the relay.
  8.  
  9. Apply battery voltage across terminals STA and E1.
  10.  
  11. There should be continuity between terminals B and Fp.
  12.  
  13. Apply battery voltage across terminals B and Fc.
  14.  
  15. There should be continuity between terminals B and Fp.
  16.  
  17. If operation is not as specified, replace the relay.
  18.  

 
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