DTC Troubleshooting: 112

DTC 112: Lost Communication with the VSA Modulator-Control Unit

1. Check for VSA system DTCs with the HDS.

Are any DTCs indicated?

YES | - | Troubleshoot the indicated VSA system DTC(s).■
NO | - | Go to Step 2 .

1. Clear the DTCs with the HDS.

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

1. Check for DTCs with the HDS.

Is DTC 112 indicated?

YES | - | Go to Step 5 .
NO | - | Intermittent failure. The system is OK at this time. Check for loose or poor connections.■

1. Turn the ignition switch OFF.

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

1. Disconnect the VSA modulator-control unit 47P connector.

1. Check for continuity between the adaptive cruise control (ACC) unit 20P connector No. 10 terminal and the VSA modulator-control unit 47P connector No. 14 terminal.

Is there continuity?

YES | - | Go to Step 9 .
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) unit and the branch of the F-CAN line (CANH).■

1. Check for continuity between the adaptive cruise control (ACC) unit 20P connector No. 20 terminal and the VSA modulator-control unit 47P connector No. 30 terminal.

Is there continuity?

YES | - | Check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit. ■
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) unit and the branch of the F-CAN line (CANL).■