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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Power Window System) >> Diagnostic Tests >> DTC B2285: Battery No. 2 Fault (RDCM) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify vehicle starting/charging system is functioning properly. See appropriate article in STARTING & CHARGING SYSTEMS. Repair as necessary. If starting and charging systems are functioning properly, go to next step.
  2. Using scan tool, select RDCM data display and monitor battery No. 2 data. If scan tool display shows 8.5-16.3 volts, go to step  4 . If scan tool display does not show 8.5-16.3 volts, go to next step.
  3. Turn ignition switch to OFF position. Disconnect RDCM Black, 6-pin connector C3. Turn ignition switch to RUN position. Check voltage between RDCM harness connector C3 terminal "A" (Orange wire) and ground. See Figure . If 8.5-16.3 volts exists, go to step  7 . If 8.5-16.3 volts does not exist, go to step  5 .
  4. Using scan tool, select RDCM DTC display. Check for DTC B2273, B2275, B2277 or B2279. If any of these DTCs are stored as history, go to applicable DTC test. If no DTCs are stored in history, go to step  8 .
  5. Repair open or short to ground in instrument panel electrical center, or Orange wire between instrument panel electrical center and RDCM. After repair, go to step  9 .
  6. Replace RDCM. See DOOR CONTROL MODULE (DCM)  under REMOVAL & INSTALLATION. On hardtop models, using scan tool, select RH DCM. Select DCM REPROGRAM. Follow scan tool instructions. On all models, after repair, go to step  9 .
  7. Problem is intermittent, check battery No. 2 circuit for malfunction. See DIAGNOSTIC AIDS  . If a problem was found and repaired, go to step  9 . If no problem was found, go to next step.
  8. Turn ignition switch to OFF position. Reconnect or install any connectors or components that were disconnected or removed. Turn ignition switch to RUN position. Clear any DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under SELF-DIAGNOSTIC SYSTEM. Wait 2 seconds. If DTC B2285 resets, go to step  7 . If DTC B2285 does not reset, system is okay.
  9. Turn ignition switch to OFF position. Reconnect or install any connectors or components that were disconnected or removed. Turn ignition switch to RUN position. Clear any DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS)  under SELF-DIAGNOSTIC SYSTEM. Recheck system operation.
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