Circuit Opening Relay: Inspection

REMOVE RELAY BOX COVER
REMOVE CIRCUIT OPENING RELAY (Marking: C/O)
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 1: Inspecting Circuit Opening Relay Continuity
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.

Fig 2: Inspecting Circuit Opening Relay Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REINSTALL CIRCUIT OPENING RELAY
REINSTALL RELAY BOX COVER