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DTC U2006: Transmitted SPI Clock Output Low: Testing

WARNING: This page is about a different car, the 1998 Oldsmobile Cutlass and 1998 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. If BFC diagnostic system check was performed, go to next step. If BFC diagnostic system check was not performed, see procedures in BFC DIAGNOSTIC SYSTEM CHECK  .
  2. Disconnect BFC Pink 24-pin connector C3. Turn ignition switch to RUN position. Using DVOM, check voltage at BFC harness connector C3, terminal A7 (Pink/Black wire). If battery voltage exists, go to next step. If battery voltage does not exist, go to step 6).
  3. Check for a poor connection at BFC connector C3, terminal A7 (Pink/Black wire). If a poor connection exists, go to next step. If connection is okay, go to step 5).
  4. Repair poor connection at BFC connector C3, terminal A7 (Pink/Black wire). Go to step 13).
  5. Replace BFC. See REMOVAL & INSTALLATION  . Go to step 13).
  6. Disconnect instrument cluster Gray 24-pin connector. Using DVOM, check resistance between BFC harness connector C3, terminal A7 (Pink/Black wire) and instrument cluster harness connector terminal A10 (Pink/Black wire). If resistance is 0-2 ohms, go to next step. If resistance is not 0-2 ohms, go to step 8).
  7. Check resistance between BFC harness connector C3, terminal A7 (Pink/Black wire) and ground. If resistance is infinite, go to step 10). If resistance is not infinite, go to step 9).
  8. Repair open in Pink/Black wire between BFC connector C3 and instrument cluster. Go to step 13).
  9. Repair short to ground in Pink/Black wire between BFC connector C3 and instrument cluster. Go to step 13).
  10. Check for a poor connection at instrument cluster connector terminal A10 (Pink/Black wire). If a poor connection exists, go to next step. If connection is okay, go to step 12).
  11. Repair poor connection at instrument cluster connector terminal A10 (Pink/Black wire). Go to step 13).
  12. Replace instrument cluster. See INSTRUMENT PANEL article. Go to next step.
  13. Clear DTCs. Perform BFC DIAGNOSTIC SYSTEM CHECK  .
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