Inspect Relay Circuit

Disconnect the relay connector and inspect the connector on the wire harness side as shown in the chart. See Fig 1 and Fig 2 .
Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 3, check that the solenoids operate lock direction. Then, reverse the polarity, check that the solenoids operate unlock direction. If any of the solenoids do not operate, remove and test the solenoid.
If circuit operation is correct, replace the relay.

Fig 1: Identifying Door Lock Control Relay Wire Harness Terminals

Fig 2: Testing Door Lock Control Relay