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DTC B1327: Device Power Circuit Low: Testing

  1. Perform starting and charging diagnostic system check. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS. Go to next step.
  2. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, observe VOLTS parameter in DIM data list. If scan tool displays more than 9.5 volts, go to step  7 . If scan tool displays 9.5 volts or less, go to next step.
  3. Turn ignition off. Disconnect Dash Integration Module (DIM) connector C3. Measure voltage between DIM harness connector C3 terminals A12 (Orange wire) and B12 (Black/White wire). See Figure . If battery voltage exists, go to step  7 . If battery voltage does not exist, go to next step.
  4. Measure voltage between a known good ground and DIM harness connector C3 terminal A12 (Orange wire). If battery voltage exists, go to step  6 . If battery voltage does not exist, go to next step.
  5. Check for open or high resistance in battery positive voltage sense circuit between DIM harness connector C3 terminal A12 (Orange wire) and battery. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Repair circuit as necessary and go to step  9 . If circuit is okay, go to step  7 .
  6. Check for open or high resistance in ground sense circuit between DIM harness connector C3 terminal B12 (Black/White wire) and battery. See GROUND DISTRIBUTION article in WIRING DIAGRAMS. Repair circuit as necessary and go to step  9 . If circuit is okay, go to step  8 .
  7. Inspect DIM connector C3 for poor connections. Repair connector as necessary and go to step  9 . If connector is okay, go to next step.
  8. Replace DIM. See DASH INTEGRATION MODULE under REMOVAL & INSTALLATION. Go to next step.
  9. Using scan tool, clear DTCs. Retest system. If DTC resets, go to step  2 . If DTC does not reset, system is okay.
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