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Home >> Mazda >> 2009 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> External Pages >> Different car >> Section 551 (On-Board Diagnostic [MULTIPLEXCOMMUNICATION System]) >> Procedures For Determining The Location Of A Malfunction [Multiplex Communication System] >> EHPAS Control Module

EHPAS Control Module

WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the display of DTC U0100 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)
    CAUTION:
    • DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).
    NOTE:
    • You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC Service Function" > "Freeze Frame Data" This function is supported on IDS, not PDS.
  2. Referring to the following table, determine the malfunctioning part of the CAN system.
    REFERENCE CHART

    -: Communication error
    Module Communication status Malfunction location
    PCM
    EHPAS control module -
    • Wiring harness A
    • Wiring harness C
    • Wiring harness D
    • Wiring harness E
    • EHPAS control module
    • PCM
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