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Home >> Dodge and Ram >> 1990 >> Caravan Base, 2.5 K, Standard >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator - Except BOSCH >> Diagnostic Testing >> Charging Circuit Check For Fault Codes

Charging Circuit Check For Fault Codes

  1. Connect DRB-II (C-4805) to engine harness connector. Turn ignition on-off-on-off-on within 5 seconds. Codes 88-12-55 indicate no faults. Proceed to BATTERY TEMPERATURE SENSOR CALIBRATION CHECK .
  2. Code 16 indicates a (battery voltage for charging system) fault. If Codes 88-12-16-55 are displayed, go to CHECKING FOR FAULT CODE 16. Record all codes. Turn ignition off and disconnect and reconnect battery connector.
  3. Start engine and run for 2 minutes. Code 46 or 41-46 indicates an alternator field (charging system output to high) fault. If Codes 88-12-46-55 or 88-12-41-46-55 are displayed, proceed to CHECKING FOR FAULT CODES 41-46 OR 46 .
  4. Code 41 or 41-47 indicates an alternator field (charging system output too low) fault. If Codes 88-12-41-55 or 88-12-41-47-55 are displayed, go to CHECKING FOR FAULT CODES 41 OR 41-47 .
  5. Code 47 indicates an alternator output fault. If Codes 88-12-47-55 are displayed, check fan belt, battery and alternator. Record all codes.
  6. No Code 88 indicates battery voltage for SMEC is low. This will leave system in standby memory. Repair battery feed wire to cavity No. 2 of SMEC connector (Black) open circuit. See Figure.
  7. If the same code appears before and after engine is started and problem still exists, ensure DRB-II is operational and an open circuit does not exist in SMEC-to-diagnostic connector wiring.
  8. If a fault code does not reappear after engine is started, problem no longer exists. Proceed to CHECK FOR INTERMITTENT FAILURES .
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