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Home >> Isuzu >> 1999 >> Hombre S, 2.2 4, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Tests (2.2L) >> Diagnostic Trouble Code Identification >> DTC P0106: Map Sensor System Performance >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in SELF-DIAGNOSTICS - INTRODUCTION article. After performing OBD-II system check, go to next step.
  2. Turn ignition off. Install Tech 2 scan tool. Turn ignition on, with engine off. Using scan tool, compare BARO reading with a know-good vehicle. If BARO readings are close to each other, go to next step. If not, go to step  7 .
  3. Start engine while watching MAP sensor value. If MAP sensor value changes while starting engine, go to next step. If MAP sensor value does not, go to step  5 .
  4. With engine still running, snap throttle while watching MAP sensor display on scan tool. If MAP sensor value changes rapidly with throttle position changes, go to step  9 . If MAP sensor value does not change rapidly, go to step  6 .
  5. Disconnect MAP sensor vacuum hose. Install hand-held vacuum pump to MAP sensor. Turn ignition on, with engine off. Apply 15 in. Hg to MAP sensor. Monitor MAP sensor value on scan tool. If MAP sensor value changes, go to next step. If MAP sensor value does not change, go to step  7 .
  6. Remove MAP sensor vacuum hose from manifold port. Inspect both for restriction. Repair as necessary. After repairs, go to step  8 . If no problems were found, go to next step.
  7. Replace MAP sensor. After replacing sensor, go to next step.
  8. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Drive vehicle at a steady speed. Select SPECIFIC DTC function, then enter DTC P0106. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not indicate TEST RAN AND PASSED, repeat step  2 .
  9. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time.
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