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Home >> Isuzu >> 2007 >> Ascender 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1446 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac Torrent and 2007 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector C1 at the VCIM.
  2. Ignition ON, test for 12.3-12.9 volts between the supply voltage circuit terminal 14 and the low reference circuit terminal 13.
    • If voltage is not within the specified range, replace the BUB.
  3. If all circuits test normal, replace the VCIM.
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