Circuit Opening Relay: Inspection

REMOVE CIRCUIT OPENING RELAY

Fig 1: Removing Circuit Opening Relay
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INSPECT EFI MAIN RELAY CONTINUITY
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.

Fig 2: Checking Continuity Between Terminals 1 & 2 Using An Ohmmeter
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INSPECT CIRCUIT OPENING RELAY OPERATION
1. Apply battery 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.
REINSTALL CIRCUIT OPENING RELAY

Fig 3: Checking Continuity Between Terminals 3 & 5 Using An Ohmmeter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002