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Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control >> Dynamic Radar Cruise Control System >> DTC P1631 Communication Error from ECM to VSC >> Inspection Procedure

Inspection Procedure

NOTE: When the ECM is replaced with a new one, initialization must be performed (See INSTALLATION  ).
  1. REPLACE ECM 
    1. Replace the ECM (for 2UR-GSE) (See ECM ).
  2. CHECK DTC 
    1. Clear the DTC (See DTC CHECK / CLEAR  ).
    2. Turn the cruise control main switch on
    3. Drive the vehicle at the require speed (45 km/h (27 mph) or higher).
    4. Check if the same DTC is recorded (See DTC CHECK / CLEAR  )

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTC P1631 is not output A
      DTC P1631 is output B

    B: REPLACE SKID CONTROL ECU  (See SKID CONTROL ECU )

    A: END