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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 523 (Charging System) >> Diagnostic Tests >> DTC B1328: Device Power Circuit High >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. If engine electrical diagnostic system check was performed, go to next step. If engine electrical diagnostic system check was not performed, go to ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK  under ON-VEHICLE TESTING.
  2. Connect scan tool to Data Link Connector (DLC). Start engine. Using scan tool, observe ELECTRONICS BATTERY FD parameter from BCM data list. If scan tool indicates battery voltage is 18.0 volts or more, go to next step. If scan tool indicates battery voltage is less than 18.0 volts, go to step  4 .
  3. Using DVOM measure voltage across battery terminals. If battery voltage is less than 18.0 volts, go to next step. If battery voltage is 18.0 volts or more, go to TEST A: CHARGING SYSTEM TEST  under SYSTEM TESTS.
  4. Replace Body Control Module (BCM). After replacement, reprogram BCM. See BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repair are made, go to next step.
  5. Using scan tool, clear DTCs. Start engine. If DTC B1328 does not reset, system is okay. If DTC B1328 resets, go to step  2 .
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