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Home >> Lexus >> 2004 >> RX 330 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 598 (Brake Control) >> Vehicle Stability Control System >> DTC C1203/53 ECM Communication Circuit Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK PART NUMBER (ECM AND BRAKE ACTUATOR ASSEMBLY) 
    1. Check that the proper ECM and brake actuator assembly (skid control ECU) are installed.

      OK: 

      Proper ECUs are installed. 

    NG: REPLACE ECUS WITH PROPER ONES 

    OK: REPLACE ECM (See  REMOVAL  )