DTC B2A70-14

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Acura RLX, 2019 Acura RLX, 2018 Acura RLX, 2017 Acura RLX, and 2016 Acura RLX. However, it is still accessible from the selected car via links, so may be relevant.

DTC B2A70-14 : LDW/RDM Switch Signal Circuit Short to Power

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC Description	DTC	Freeze Frame
B2A70-14 LDW/RDM Switch Signal Circuit Short to Power

DTC (IDAS)

Problem verification
-1. Turn the vehicle to the ON mode.

-2. Clear the DTC with the HDS.

-3. Turn the vehicle to the OFF (LOCK) mode.

-4. Turn the vehicle to the ON mode, then wait for at least 2 seconds.

-5. Check for DTCs with the HDS.

Is DTC B2A70-14 indicated?

YES

The failure is duplicated. Go to step 2.

NO

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .
RDM OFF switch check
-1. Turn the vehicle to the OFF (LOCK) mode.

-2. Test the RDM OFF switch .

Is the RDM OFF switch OK?

YES

RDM OFF switch is OK. Go to step 3.

NO

Replace the multi visor switch .

Shorted wire check (LDW OFF SW line to power)

-1. Disconnect the following connector.

Multipurpose camera unit 20P connector

-2. Turn the vehicle to the ON mode.

-3. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Multipurpose camera unit 20P connector: disconnected
Test point 1	Multipurpose camera unit 20P connector No. 8
Test point 2	Body ground

Is there battery voltage?

YES

Repair a short to power in the wire between the RDM OFF switch and the multipurpose camera unit.

The LDW OFF SW wire is OK. Go to step 4.

Multipurpose camera unit check (update)
-1. Turn the vehicle to the OFF (LOCK) mode.

-2. Reconnect the following connector.

Multipurpose camera unit 20P connector

-3. Update the multipurpose camera unit if it does not have the latest software .

-4. Turn the vehicle to the OFF (LOCK) mode.

-5. Turn the vehicle to the ON mode, then wait for at least 2 seconds.

-6. Check for DTCs with the HDS.

Is DTC B2A70-14 indicated?

YES

Check for loose terminals in the multipurpose camera unit 20P connector. If the multipurpose camera unit was updated and the symptom/indication is still present, replace the multipurpose camera unit .

NO

Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTC's troubleshooting.