HV Battery Cooling: Inspection

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Inspect blower motor operation . See DTC P3077: BATTERY COOLING FAN MOTOR CIRCUIT MALFUNCTION .
Inspect battery fan relay :
1. Remove the battery fan relay.
  
  Fig 1: Locating Battery Fan Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the battery fan relay continuity.
  1. Using an ohmmeter, check that there is continuity between terminals 1 and 2.
    
    Fig 2: Testing Battery Fan Relay Continuity
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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.
3. Inspect the battery fan relay operation.
  1. Apply battery voltage across terminals 1 and 2.
    
    Fig 3: Testing Battery Fan Relay Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
  If there is no continuity, replace the relay.
4. Install the battery fan relay.