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Home >> Chevrolet >> 1996 >> Astro Van Cargo, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0106 - Map Sensor System Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Turn ignition on, engine off. Using scan tool, read MAP sensor voltage. Voltage should be 4.0-4.5 volts. If voltage varies 0.4 volt or more from specification, go to next step. If voltage does not vary 0.4 volt or more, go to step 6).
  3. Disconnect and plug MAP sensor vacuum source. Connect a vacuum gauge to MAP sensor. Start engine. Using scan tool, read and record MAP sensor voltage. Observe and record MAP sensor voltage while applying 10 in Hg. If difference between first and second reading is 1.5 volts or more, see DIAGNOSTIC AIDS. If difference is less than 1.5 volts, go to next step.
  4. Check for faulty connection at MAF sensor. If faulty connection is found, go to next step. If connection is okay, go to step 6).
  5. Repair connection as necessary and go to step 7).
  6. Replace MAP sensor and go to next step.
  7. Using scan tool, select DTC, CLEAR INFO function. Start engine and allow it to reach operating temperature. Using scan tool, select DTC, SPECIFIC function and enter DTC P0106. Operate vehicle within conditions required to set DTC. If scan tool displays RAN AND PASSED, go to next step. If scan tool does not display RAN AND PASSED, return to step 2).
  8. Using scan tool, select Read and Record INFO in REVIEW INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs. If no DTCs are displayed, system is okay.
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