1. Check for continuity between the adaptive cruise control (ACC) unit 20P connector No. 16 terminal and adaptive cruise control (ACC) relay 5P connector No. 3 terminal.

Is there continuity?

YES | - | Go to Step 29 .
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) unit and the adaptive cruise control (ACC) relay.■

1. Install the adaptive cruise control (ACC) relay.

1. Reconnect the adaptive cruise control (ACC) unit.

1. Clear the DTCs with the HDS.

1. Turn the ignition switch ON (II) and the adaptive cruise control (ACC) switch ON.

1. Select the ADAPTIVE CRUISE CONTROL (ACC) from the DRIVING SUPPORT menu, then enter ACC RELAY from the FUNCTION TEST menu.

1. Do the adaptive cruise control (ACC) relay function test.

1. Check for DTCs with the HDS.

Is DTC 30 indicated?

YES | - | Check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit. ■
NO | - | Troubleshoot the indicated DTC. If there is no DTC, the system is OK at this time.■

1. Check for the DTCs with the HDS.

Is DTC 30 indicated?

YES | - | Go to Step 37 .
NO | - | Go to Step 43 .

1. Do the adaptive cruise control (ACC) relay test.

Is the relay OK?

YES | - | Go to Step 38 .
NO | - | Replace the relay and recheck.■

1. Remove the adaptive cruise control (ACC) relay.

1. Disconnect the adaptive cruise control (ACC) unit 20P connector.

1. Disconnect each brake light 4P connector and the high mount brake light 2P connector.