DTC Troubleshooting: B18C6, B1E76
DTC B18C6: Short to Power in the Left Side BSI Radar Unit Indicator Circuit
DTC B1E76: Short to Power in the Right Side BSI Radar Unit Indicator Circuit
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
B18C6 Short to power in the left side BSI radar unit indicator circuit
  
B1E76 Short to power in the right side BSI radar unit indicator circuit
  

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.

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

?5.
Check for DTCs with the HDS.
DTC Description
DTC
B18C6 Short to power in the left side BSI radar unit indicator circuit
  
B1E76 Short to power in the right side BSI radar unit indicator circuit
  

Is DTC B18C6 or B1E76 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.?
2.
DTC check:

DTC check
?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.
Disconnect the following connector.
Left BSI alert indicator 2P connector
Right BSI alert indicator 2P connector

?5.
Turn the vehicle to the ON mode.

?6.
Check for DTCs with the HDS.
DTC Description
DTC
B18C6 Short to power in the left side BSI radar unit indicator circuit
  
B1E76 Short to power in the right side BSI radar unit indicator circuit
  
B18C7 Open in the left side BSI radar unit indicator circuit
  
B1E77 Open in the right side BSI radar unit indicator circuit
  

Is DTC B18C6 change to DTC B18C7, or B1E76 change to DTC B1E77?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (BSI L IND, BSI R IND line):

Shorted wire check (BSI L IND, BSI R IND line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Left side BSI radar unit 6P connector
Right side BSI radar unit 6P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Left side BSI radar unit 6P connector: disconnected
 
Right side BSI radar unit 6P connector: disconnected
 
Left BSI alert indicator 2P connector: disconnected
 
Right BSI alert indicator 2P connector: disconnected
Test point 1
Left BSI alert indicator 2P connector (female terminals) No. 1:
Test point 2
Body ground

Test point 1
Right BSI alert indicator 2P connector (female terminals) No. 1:
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Repair a short to power between the BSI alert indicator and the BSI radar unit.?
     
NO