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Procedures For Determining The Location Of A Malfunction: Pcm

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the display of DTC U0121 and/or U0155, using the SST  (WDS or equivalent). (See DTC TABLE  .)
  2. Referring to the following table, determine the malfunctioning part of the CAN system.
    Fig 1: Malfunction Location Table
    G01344144Courtesy of MAZDA MOTORS CORP.
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