DTC Troubleshooting: B2A70-14
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
    

1.
Problem verification:

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, then the ON mode.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
B2A70-14 LDW/RDM Switch Signal Circuit Short to Power
    

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. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
RDM switch internal resistance check:

RDM switch internal resistance check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove and test the RDM switch.

Is the RDM switch OK?

     
YES
     
     
     
RDM switch is OK. Go to step 3.
     
NO
     
     
     
3.
Shorted wire check (LDW OFF SW line to power):

Shorted wire check (LDW OFF SW line to power)
?1.
Install the RDM switch.

?2.
Connect the following connector.
CMBS OFF switch/RDM switch 10P connector

?3.
Disconnect the following connector.
Multipurpose camera unit 20P connector

?4.
Turn the vehicle to the ON mode.

?5.
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 LDW OFF SW wire between the RDM switch and the multipurpose camera unit.?
     
NO
     
     
     
Check for loose terminals and poor connections in the multipurpose camera unit 20P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the multipurpose camera unit.?