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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 52 (Automatic Transaxle) >> Automatic Transmission System >> DTC U0100 Lost Communication with ECM / PCM "A" >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0100) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) position and push the Techstream main switch ON.
    3. When you use Techstream:

      Select the item "Powertrain / Engine and ECT / Trouble Codes".

    4. Read the DTCs using the Techstream.

      Result 

      RESULT REFERENCE

      Display (DTC output) Proceed to
      U0100 A
      U0100 and other DTCs B

    B: GO TO DTC CHART 

    A: REPLACE ECM 

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