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Body Control Module (BCM) Inspection: Notes

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the following parts:
    1. Front scuff plate (LH) (See FRONT SCUFF PLATE REMOVAL/INSTALLATION .)
    2. Front side trim (LH) (See FRONT SIDE TRIM REMOVAL/INSTALLATION .)
    3. Upper panel (See UPPER PANEL REMOVAL/INSTALLATION .)
    4. Shift knob (MTX) (See MANUAL TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
    5. Selector lever knob (ATX) (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
    6. Shift panel (See SHIFT PANEL REMOVAL/INSTALLATION .)
    7. Side wall (See SIDE WALL REMOVAL/INSTALLATION .)
    8. Console (See CONSOLE REMOVAL/INSTALLATION .)
  2. Set the hood release lever out of the way. (See HOOD LATCH AND RELEASE LEVER REMOVAL/INSTALLATION .)
  3. Remove the lower panel, (driver-side) (See LOWER PANEL REMOVAL/INSTALLATION .)
  4. Set the starter cut relay out of the way. (with advanced keyless entry and push button start system) (MTX) (see STARTER CUT RELAY REMOVAL/INSTALLATION [MTX] .)
  5. Remove the BCM with the connector connected. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
  6. Measure the voltage at each terminal is as indicated in the Terminal Voltage Tables.
    • If the voltage or continuity is not as specified in the Terminal Voltage Table, inspect the parts under "Inspection item (s)".
      • If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BCM.
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