B18A8

DTC Troubleshooting: B18A8

DTC B18A8:

Right BSI Radar Unit Voltage Input Low

1. Clear the DTCs with the HDS.

2. Press the engine start/stop button to select the ON mode, then wait for 20 seconds.

3. Check for DTCs with the HDS.

Is DTC B18A8 indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.

4. Press the engine start/stop button to select the OFF mode.

5. Check the connection at the right BSI radar unit 6P connector.

Is the connection OK?

YES -

Go to step 6.

NO -

Repair the poor connection, and retest.

6. Disconnect the right BSI radar unit 6P connector.

7. Press the engine start/stop button to select the ON mode.

8. Measure the voltage between right BSI radar unit 6P connector terminals No. 2 and No. 5.





Is there battery voltage?

YES -

Replace the right BSI radar unit BSI Radar Unit Removal/Installation.

NO -

Go to step 9.

9. Measure the voltage between right BSI radar unit 6P connector terminals No. 2 and body ground.





Is there battery voltage?

YES -

Repair an open in the wire between the right BSI radar unit 6P connector and ground (G701).

NO -

Repair an open in the wire between the driver's under-dash fuse/relay box and the right BSI radar unit.