Circuit Opening Relay: Inspection

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

Fig 1: Removing Circuit Opening Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CIRCUIT OPENING RELAY CONTINUITY
1. Using an ohmmeter, check that there is a continuity between terminal 1 and 2.
  If there is no continuity, replace the relay.
2. Check that there is no continuity between terminal 3 and 5.
  If there is a continuity, replace the relay.
  
  Fig 2: Inspecting Circuit Opening Relay Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CIRCUIT OPENING RELAY OPERATION
1. Apply the battery positive voltage across terminal 1 and 2.
2. Using an ohmmeter, check that there is a continuity between terminal 3 and 5.
  If there is no continuity, replace the relay.
REINSTALL CIRCUIT OPENING RELAY
REINSTALL RELAY BOX COVER

Fig 3: Inspecting Circuit Opening Relay Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002