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Home >> Isuzu >> 1997 >> Rodeo LS, 2.6 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.6L >> Circuit Testing >> DTC P0106 - Map Sensor System Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC TESTING article. After performing OBD system check, go to next step.
  2. With ignition on and engine off, review and record FAILURE RECORDS data on scan tool. Operate vehicle within FAILURE RECORDS conditions. If DTCP0106 is set, go to step 4). If it indicates DTC P0106 did not fail, go to next step.
  3. Check for: MAP sensor seal missing of damaged, vacuum hoses (to MAP) disconnected, damaged or incorrectly routed, or intake manifold vacuum leaks, throttle body leaks, EGR valve flange and pipe leaks, or PCV faulty, missing or incorrectly installed. Repair as necessary. Retest system. If no problem was found, see DIAGNOSTIC AIDS  .
  4. Disconnect MAP sensor connector and observe MAP value displayed on scan tool. If value is near 11 kPa, go to next step. If value is not near 11 kPa, go to step 13).
  5. Connect a test light between battery positive and MAP sensor signal circuit at sensor harness connector and observe MAP value on scan tool. If value is near 104 kPa, go to next step. If value is not near 104 kPa, go to step 9).
  6. Jumper 5-volt reference circuit and MAP signal circuit together at sensor harness connector. Observe MAP value displayed on scan tool. If value is near 104 kPa, go to next step. If value is not near 104 kPa, go to step 8).
  7. With ignition off, disconnect PCM and check sensor ground circuit for high resistance, open between PCM and MAP sensor, or poor connection at PCM. Repair as necessary. Retest system. If no problem is found, go to step 11).
  8. Check 5-volt reference circuit for high resistance, open between PCM and MAP sensor, or poor connection at PCM. Repair as necessary. Retest system. If no problem is found, go to step 10).
  9. With ignition off, disconnect PCM. Check MAP sensor signal circuit for high resistance, an open, short to ground, or short to sensor ground circuit. Repair as necessary. Retest system. If no problem is found, go to next step.
  10. Check MAP sensor signal circuit for poor connection at PCM. Repair as necessary. Retest system. If no problem is found, go to step 14).
  11. Check for poor connection at MAP sensor. Repair as necessary. Retest system. If no problem is found, go to next step.
  12. Replace MAP sensor. Retest system.
  13. Turn ignition off and disconnect PCM. With engine off, turn ignition on, check MAP signal circuit for a short to voltage or to 5-volt reference circuit. Repair as necessary. Retest system. If no problem is found, go to next step.
  14. Replace PCM. Program replacement PCM using required equipment. Retest system.
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