Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Before commencing troubleshooting, check if the main body ECU is wet. If it is, replace the main body ECU

CHECK WHETHER DTC OUTPUT RECURS
1. Clear the DTCs (see DTC CHECK / CLEAR )
2. Check whether DTC B2277 recurs 30 seconds or more after the power switch is turned ON (IG)
  OK: No DTC is output.
NG: REPLACE MAIN BODY ECU

OK: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH TROUBLESHOOTING ).