DTC B12D2: Power Control Unit IG2 Circuit Error
NOTE: Make sure aftermarket accessories are not installed.
- 1. 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.
Is DTC B12D2 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- 2. Determine possible failure area (IG2 relay circuit ON problem, IG2 relay circuit OFF problem):
- 1. Check each PCU value with the DATA LIST menu.
- 2. Check the IG2 with the HDS.
Is there battery voltage?
YES
Go to step3.
NO
Go to step 4.
- 3. Under-dash subrelay box test (IG2 relay circuit):
- 1. Do the under-dash subrelay box test (IG2 relay circuit) .
Is IG2 relay circuit OK?
YES
Repair a short to power in the wire.
NO
Faulty IG2 relay circuit, replace the under-dash subrelay box .
- 4. Under-dash subrelay box test (IG2 relay circuit):
- 1. Do the under-dash subrelay box test (IG2 relay circuit) .
Is IG2 relay circuit OK?
YES
Repair an open or high Ω in the wire.
NO
Faulty IG2 relay circuit, replace the under-dash subrelay box .