Circuit Opening Relay: Inspection

REMOVE RELAY BOX COVER
REMOVE CIRCUIT OPENING RELAY (Marking: C/O)

Fig 1: Locating Circuit Opening Relay
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INSPECT CIRCUIT OPENING 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
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CIRCUIT OPENING RELAY OPERATION
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.
REINSTALL CIRCUIT OPENING RELAY
REINSTALL RELAY BOX COVER

Fig 3: Checking Continuity Between Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002