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Home >> Chevrolet >> 1996 >> Monte Carlo LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.1L Engine >> Diagnostic Trouble Codes >> DTC P0706 - Transmission Range Switch Performance >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. If DTC P0705 is also set, go to that DTC for diagnosis. If DTC P0705 is not set, go to next step.
  3. Ignition on. Place gear selector in Park. If scan tool display indicates Park or Neutral, go to next step. If not, go to step 5).
  4. Place gear selector in Neutral. If scan tool display indicates Park or Neutral, see DIAGNOSTIC AIDS. If not, go to next step.
  5. Observe scan tool TR P A B C display. If scan tool display indicates P=0, A=0, B=0 and C=0, go to next step. If not, go to step 8).
  6. Unplug transaxle range switch 4-wire connector. If scan tool display does not changed, go to next step. If display has changes, go to step 8).
  7. Ignition off. Unplug PCM. Check transaxle range switch wiring harness for damage (short to ground). Repair as necessary and go to step 12). If no repairs are required, go to step 11).
  8. Attempt to adjust transaxle range switch. If scan tool transaxle input now reads Park or Neutral with transaxle gear selector in Park or Neutral, go to step 12). If not, go to next step.
  9. Using appropriate wiring diagram (see WIRING DIAGRAMS article), check for improperly wired transaxle range switch. Repair as necessary and go to step 12). If no repairs are required, go to next step.
  10. Replace transaxle range switch. After repairs, go to step 12).
  11. Replace PCM. Reprogram PCM using required equipment. After repairs, go to step 12).
  12. Clear DTCs. Monitor scan tool TR switch parameter and write down gear status while selecting each transaxle gear using gear selector. See DTC P0705 for correct TR PABC display. If display is correct, system is okay. If not, go to step 2).
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