DTC Troubleshooting: B12D1
DTC B12D1: Power Control Unit IG1B Circuit Error
DTC Description
DTC
B12D1 Power Control Unit IG1B Circuit Error
  

NOTE: Make sure aftermarket accessories are not installed.

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Press the engine start/stop button to select the ON mode.

?3.
Wait 10 seconds.

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

?5.
Wait 5 seconds.

?6.
Check for DTCs with the HDS.
DTC Description
DTC
B12D1 Power Control Unit IG1B Circuit Error
  

Is DTC B12D1 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
Determine possible failure area (IG1b relay circuit ON problem, IG1b relay circuit OFF problem):

Determine possible failure area (IG1b relay circuit ON problem, IG1b relay circuit OFF problem)
?1.
Press the engine start/stop button to select the ON mode

?2.
Select KEYLESS ACCESS CONTROL from the ONE-PUSH START system select menu with the HDS, and enter DATA LIST.


?3.
Check the IG1B with the HDS.

Is there battery voltage?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 4.
3.
Under-dash sub fuse/relay box test (IG1b relay circuit):

Under-dash sub fuse/relay box test (IG1b relay circuit)
?1.
Do the under-dash sub relay box test (IG1b relay circuit).

Is IG1a relay circuit OK?

     
YES
     
     
     
Repair a short to power in the wire.?
     
NO
     
     
     
Faulty IG1b relay circuit, replace the under-dash sub relay box.?
4.
Under-dash sub fuse/relay box test (IG1b relay circuit):

Under-dash sub fuse/relay box test (IG1b relay circuit)
?1.
Do the under-dash sub relay box test (IG1b relay circuit).

Is IG1b relay circuit OK?

     
YES
     
     
     
Repair an open or high resistance in the wire.?
     
NO
     
     
     
Faulty IG1b relay circuit, replace the under-dash sub relay box.?